Category Archives: Renewable Energy

Fly high and far with Asia’s first fully solar-powered quadcopter drone created by NUS students


Aircraft that can take off and land directly without the need for a runway – such as helicopters and quadcopters – are attractive for personal, commercial and military applications as they require less physical space and infrastructure compared to traditional fixed wing planes. A team from the National University of Singapore (NUS) has achieved a major step forward in stretching the capabilities of quadcopter drones by powering the flight solely by natural sunlight.

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The quadcopter drone developed by the NUS Engineering team can be powered solely by sunlight and has flown above 10 metres in test flights.

A first in Asia, the current prototype has flown above 10 metres in test flights – higher than a typical three storey building – utilising solar power with no battery or other energy storage on board.

This solar-powered drone, which was developed as a student project under the Innovation & Design Programme (iDP) at NUS Faculty of Engineering, can take-off and land vertically without a runway. Constructed using lightweight carbon fibre material, the quadcopter drone weighs only 2.6 kg, and has a surface area of about 4 sqm. It is fitted with 148 individually characterised silicon solar cells and supported by a frame equipped with four rotors.

A major aviation feat

Rotary winged aircraft are significantly less efficient at generating lift compared to their fixed wing counterparts. Hence, while there have been examples of solar airplanes in recent years, a viable 100 per cent solar rotary aircraft that can take-off and land vertically remains a major engineering challenge to date.

“Our aircraft is extremely lightweight for its size, and it can fly as long as there is sunlight, even for hours. Unlike conventional quadcopter drones, our aircraft does not rely on on-board batteries and hence it is not limited by flight time. Its ability to land on any flat surface and fly out of the ground effect in a controlled way also makes it suitable for practical implementation,” said Associate Professor Aaron Danner from the Department of Electrical and Computer Engineering at NUS Faculty of Engineering, who supervised the project.

The solar-powered quadcopter drone can be controlled by remote control or programmed to fly autonomously using a GPS system incorporated into the aircraft. The aircraft can potentially be used as a ‘flying solar panel’ to provide emergency solar power to disaster areas, as well as for photography, small package delivery, surveillance and inspection. Batteries can be incorporated to power the aircraft when there is no sunlight or for charging to take place during flight to enable operation when it is cloudy or dark. Other hardware such as cameras can also be included for specific applications.

Since 2012, eight NUS student teams have made successive design improvements and worked towards a fully-solar powered aircraft under the supervision of Assoc Prof Danner, who also holds a joint appointment at the Solar Energy Research Institute of Singapore at NUS. The first solar-assisted quadcopter drone developed by students in 2012 could only achieve 45 per cent of flight power from solar cells and the rest from on-board batteries.

The latest team, comprising then-final year NUS Engineering students Mr Goh Chong Swee, Mr Kuan Jun Ren and Mr Yeo Jun Han, made further refinements to the earlier prototypes of the quadcopter drone. They eventually achieved a fully solar-powered flight with their latest prototype. The team members, who have just graduated from NUS in July 2018, were jointly supervised by Mr Brian Shohei Teo from the iDP programme for this project.

Mr Yeo said, “We encountered many engineering challenges when building the drone. These included finding an optimal number of solar cells efficient and light enough to power the propulsion system, which in turn has to be light and at the same time able to produce sufficient thrust to lift the aircraft. Other issues we faced included tuning and calibration of flight controls to enhance flight stability, as well as designing a frame that is lightweight yet sufficiently rigid. This has been an excellent learning opportunity for us.”

“To be able to make something fly under control for a long time is a very complex engineering problem. Our students have attained flight in its purest form, powered by natural sunlight. This is an amazing achievement,” said Mr Teo.

The team will continue to fine-tune the aircraft to further improve its efficiency. With these enhancements, they hope to bring the technology closer to commercialisation.

Source: National University of Singapore (NUS).

Cutting Edge Energy Storage Solution For Manchester Science Park

MSP looks to the future with industry-leading advanced energy storage

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THE most advanced commercial energy storage solution currently available has been unveiled by Manchester Science Partnerships (MSP).

In a UK industry-leading move, the country’s leading science and technology park operator has invested more than £400,000 in its advanced energy strategy.

This investment includes the installation of a Tesla Powerpack system outside its flagship HQ, the Bright Building, at Manchester Science Park, along with two new charging points for electric vehicles.

The move will help insulate MSP from shifting commercial tariffs and escalating non-commodity prices, while also allowing it to substantially reduce its carbon footprint through wider use of renewable energy.

With buildings accounting for more than a third of total UK greenhouse gas emissions, this latest investment is further evidence of both MSP’s, and majority shareholder Bruntwood’s, commitment to operating sustainably and addressing the world’s environmental challenges head-on.

Crucially, the Tesla Powerpack also allows MSP to offer customers operating in R&D-heavy sectors unrivalled assurances in resilience and business continuity.

It can kick-in in less than a second should primary power fail – a marked improvement on previous industry norms of up to 30 minutes.

The Powerpack system at the Bright Building has been installed with four Powerpacks and one inverter. It is a flexible, scalable battery system, with, in this case, the ability to have up to sixteen additional Powerpacks added to it if the requirements for the building increase on a power and/or energy level.

This ability to expand, as future requirements and the energy markets change, provides another level of resilience and reassurance, with the potential for the building to run all day on its energy storage system, if required.

It will give MSP the future capability ability to store power from renewable sources – such as solar energy generated during the day – and distribute it efficiently and judiciously at peak times, reducing reliance on the National Grid.

Tom Renn, MSP managing director, said: “As the only UK science and technology park operator to be offering this kind of advanced energy innovation, it’s something we’re understandably very excited about.

“MSP and Bruntwood are committed to investing in our buildings, utilising cutting-edge technology to both improve the experience of our customers and reduce our carbon footprint.

“This pilot installation marks a key milestone in our advanced energy strategy. It also makes good on a commitment to invest in sustainable improvements to our campuses, signed up to as part of our green funding package with Lloyds Bank.

“We have bold plans to harness the opportunities provided by advanced energy. We envisage that within 12 months, the Bright Building will be an energy island – self-sufficient and operating without reliance on the National Grid.”

Bev Taylor, Bruntwood’s Head of Energy, said: “The cost and feasibility of implementing lithium-ion batteries has changed markedly in recent years, making commercial energy storage viable.

“We’ll be monitoring the cost savings and CO2 reduction in the coming months, with a view to installing further units at other Bruntwood buildings and developments, such as Circle Square, Alderley Park and Innovation Birmingham.”

The pioneering project has received grant funding from CityVerve – Innovate UK’s smart city demonstrator project in which MSP is a lead partner.

Earlier this year MSP agreed a three-year finance package with Lloyds Bank in line with the lender’s Commercial Real Estate’s Green Lending Initiative.

Under the terms of its loan, which is the first of its kind to be completed by the bank in the North West of England, MSP has agreed to a series of ‘green covenants’.

This includes committing to spend more than £600,000 investment in sustainable improvements to its existing campuses, reducing annual energy intensity of all its assets by 3.5 per cent a year and increasing the amount of energy its buildings use from renewable sources by a further 10 per cent.

Source: Manchester Sience Park

Tesla to pair world’s largest lithium ion battery with Neoen wind farm in SA

 

The South Australian Government has teamed up with Tesla to roll out the world's largest virtual...

The world’s largest lithium ion battery will be installed in South Australia under a historic agreement between French renewable energy company Neoen, US sustainable energy company Tesla and the South Australian Government.

The energy storage systems from Tesla will be paired with Neoen’s Hornsdale Wind Farm and installed before summer.

Confirming the commitment from Tesla CEO Elon Musk to deliver the battery within 100 days or it is free, it has been agreed between Tesla and the South Australian Government that the starting date for the 100 days will be once the grid interconnection agreement has been signed.

After leading the nation in renewable energy, the 100MW / 129MWh battery places South Australia at the forefront of global energy storage technology.

The battery will operate at all times providing stability services for renewable energy, and will be available to provide emergency back-up power if a shortfall in energy is predicted.

The deal will also bring other investments by both Neoen and Tesla into South Australia’s economy, with details to be announced in the future.

The selection of Neoen will also strengthen South Australia’s links with France’s high-tech sector and reinforce the State’s world-leading role in tackling global warming.

 

Wind power with battery storage has been recommended through the Finkel Review as well as AEMO’s recent reports to provide energy system security services – this plan delivers on these objectives.

Neoen was selected on a merit basis after a multi-stage procurement process attracted around 90 responses to the Expression of Interest, with 14 proponents invited to supply, and 5 shortlisted for detailed assessment.

The consortium demonstrated it is capable of delivering 100MW of capacity by December 1 and provided a highly competitive commercial offer with the best value for money.

Neoen and Tesla have a track record in comparable scale projects, and are committed to deliver on time at the lowest cost with a suite of value-adding initiatives.

In March, the State Government announced a plan for South Australia to take charge of its energy future, ensuring our State would become more self-reliant.

Find out more about this project at hornsdalepowerreserve.com.au

Hytera provide Communications for Galloper Offshore Wind Farm

Supporting the Evolution of Offshore Comms Systems

Scheduled to become operational in 2018, Galloper Offshore Wind Farm is currently under construction 50km off the Suffolk coast. As Galloper will become one of the biggest offshore Wind Farms in British waters, reliable communications are essential not just to organise work, but also to ensure the health and safety of employees.

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Enabling Offshore Communications

Galloper’s Principal Marine Services contractor, James Fisher Marine Services, selected Lowestoft-based Fern Communications, an authorised Hytera dealer, to develop a purpose-built Hytera radio communication solution for the area.

FernCom was initially tasked with enabling communications along the Galloper transit routes and across the Galloper Field, which they achieved by installing a multi-site, multi-channel Hytera system. Soon after however, they were challenged by other subcontractors to develop a similar communications solution, which was when they conceptualised Wavecom.

This digital trunked radio system is powered by a Hytera Tier III solution and provides coverage to all existing and future planned wind farm sites. Designed to deliver multiple operators and subcontractors with reliable communications across a wide area, Hytera’s digital trunked radio solution is intended to manage high radio traffic, maximising available capacity across user groups along the single and multi-site geographies.

Why Digital Trunking is Different

Conventional systems operate dedicated channels, each of which is allocated to a specific user group. If you want to communicate with a particular group you need to manually select the correct channel.

With a trunked system however, radio channels can be pooled by multiple user groups and if one users wants to speak to another in a different group, the system dynamically finds and assigns a free radio channel.

Integrated System

The Wavecom System is integrated with a range of Hytera portable radios with Marine VHF, data messaging and dispatcher workstations.

The chosen radio handset is the Hytera PD755, which was selected due it its digital display and rugged, waterproof design – all fundamental given the working environment.

The inclusion of the Hytera SmartXPT dispatcher console provides a centralised control hub to manage and direct the DMR radio fleet; the Management Team can also benefit from a wide range of features such as text messaging capabilities to single or multiple handsets and voice transmission recording. Another exclusive feature offered by SmartXPT is crosspatch that allows two separate companies working on site to communicate through a private channel for inter-company coms.

A Purpose-Built System that Delivers

Wavecom offers a high level of redundancy and is monitored by a comprehensive diagnostic alarm control system designed and built by FernCom to monitor the environmental conditions in which the communications equipment is kept. Sensors are set-up to identify issues with power, cables or antenna and any problems will trigger an alert to the dedicated support team who can resolve the issue as quickly as possible.

Siemens Games, Wavecom’s first customer, is using the system to integrate their offshore Marine Control Centre with portables and vessel radios working in the ports, the transit routes and the Galloper Field. The users have always had difficulty operating the hand portable radios inside turbine towers at sea, but Wavecom’s unique solution and the Hytera devices ensure they can now communicate with the wider system.

FernCom – Industry Thought leaders

Thanks to the thought leadership and innovation at FernCom, combined with the leading Hytera digital solutions, offshore coverage for radio comms is now supported.

To recognise the outstanding work undertaken in developing Wavecom, FernCom engineer James Cleverly was recently awarded the Hytera Engineering Award – launched to recognise the skill of the top engineers in the radio industry.

Source: Hytera

NFC Transit Card The Smart Way For Payments On Singapore’s Transport System

Solar Power Could Be Harvested In Space And Beamed Back To Earth

Space Age Solar Power

Solar installations have increasingly become popular here on Earth. In some cities, it appears that almost every roof is covered by at least a solar water heater and in other locations solar electricity generation setups have sprung up like wildfire. But one idea is to move large scale power generation out into space where there is plenty of room and little limitation on the supply of solar energy.

The basic concept sounds workable. A giant power station in orbit around the earth traps ever present sunlight with the help of thousands of photovoltaic (PV) panels. 24 hour sunshine is guaranteed because of the orbit. The light is converted into electricity and then a technological breakthrough is required to transfer the power down to Earth. Obviously the idea of having a huge, dangling transmission wire connecting he space based power station and a collection point on Earth is totally impractical, in part because of the relative movement of the power station and the planet.

The breakthrough would be to beam the power down in the form of microwaves, almost like giant versions of what is used every day for communication by satellite. The power stations would be about 20,000 miles up in space which is around the same distance that orbiting satellites are located. This would entail huge antennas on Earth to capture the energy carried by the microwaves and convert it back into usable electricity. From there, the distribution to transformers and utility grids would be taken care of by existing technology.

Public suspicion of what the health issues are with microwaves emanating from space of the size envisaged should be countered by the fact that the energy levels of the microwave beams would actually be quite low.

The main obstacle that would need to be surmounted is more of a financial one. The cost of putting solar power stations would be very high and the only way to make space solar economic would be to cut down the weight of the equipment much more than it is at the moment.

Several companies are working on solar space power stations and think that the first commercially viable one may be ready for operation in around a decade.

Source: Solar Action Alliance

Lampposts to Charge Electric Cars

 

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Street lights would double up as charging points for electric cars under a scheme to cut vehicle emissions, which is in line for government funding.

The so-called light and charge technology has been developed by BMW and is due to be tried out in Germany next year.

It could also be tested here after being shortlisted for funding as part of a £35m Department for Transport scheme to create “ultra low emission” eco-cities.

Also among the dozen ideas under consideration are smartphone-style charging points with internet access; tax breaks for employees who buy low emission cars through salary sacrifice schemes; electric car pools; and scrappage schemes encouraging drivers to swap their vehicles for low-emission versions.

The transport minister, Andrew Jones, said: “We are determined to maintain international leadership on the uptake of ultra low-emission vehicles.”

 

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“Light and Charge is a simple and innovative solution which aims to seamlessly integrate a smoothly functioning charging station network into the urban landscape,” said Peter Schwarzenbauer, Member of the Board of Management of BMW AG, speaking at the official inauguration of the first two integrated street light / charging station systems. “The BMW i ChargeNow card already offers access to the world’s largest network of charging stations, and now it gives us great pleasure, in cooperation with our partners, to further expand this network with the help of the Light and Charge project. After all, a seamless charging infrastructure is essential if we want to see more electric vehicles on the road in our cities in the future.”

With its modular LED design, the Light and Charge street light is much more energy-efficient than conventional street lighting and provides more effective illumination. It can be installed anywhere and its modular design can to be tailored to different locations. Up to four LED modules can be used to provide night-time lighting on main roads, while one or two modules are sufficient to provide agreeable lighting on side streets and in residential areas. As is already the case with vehicle headlights, LED technology allows more targeted light distribution with less unnecessary and ecologically undesirable “scatter”.

With the development of the Light and Charge system, the BMW Group has signalled its commitment to the deployment of a seamless charging station infrastructure for electric vehicles. The solution it is developing in cooperation with the city of Munich can be grafted straight onto the existing local authority street lighting infrastructure, substantially increasing the number of public charging stations at a stroke. The pilot project will be launched in Munich next year. EV charging stations can be set up at any location where suitable parking is available, simply by replacing conventional street lights with Light and Charge systems.

The EV charging cable connects to a standard connector on the Light and Charge street light. The integrated control panel allows drivers to start charging with a simple press of a button. The electricity used is billed via the BMW i ChargeNow network – a system already familiar to users of the large numbers of public charging stations already participating in this network. Worldwide, the ChargeNow network already offers BMW i customers approximately 18,000 charging stations. In Europe, the concept of provider-independent charging can be further optimised with the help of the Hubject “e-roaming” platform. The Light and Charge systems presented and in use in Munich have been designed from the start for integration into the ChargeNow network and the Hubject platform. That will allow these additional charging stations to be used by as many drivers as possible, regardless of vehicle model and electricity provider.

Source: The Sunday Times/BMW

 

Ubitricity opens up new avenues in electric mobility using Vodafone M2M

 

 

Ubiquitous electricity. That’s the idea behind this Berlin-based energy company — to make electric mobility more efficient and affordable for electric car owners.

Business Need

Electricity is available almost everywhere but it is not given away for free in most places. What is missing is an economical solution for accessing the power supply and billing for the energy consumed.

Solution

Ubitricity operates a virtual grid, and has developed a billing platform and smart network as part of the package it provides. Vodafone has worked with ubitricity to develop this innovative solution, using its Global M2M Platform. A Vodafone M2M SIM card is permanently installed in the intelligent charging cables. It communicates with the ubitricity back- end via the Vodafone Global M2M Platform and controls the activation and billing of the respective charging process.

For the implementation of the innovative ubitricity concept, Vodafone individually adapted the M2M platform to the requirements of intelligent charging management to the ubitricity billing system. The international availability of the Vodafone Global M2M Platform allows ubitricity to offer and operate its solution not only in Germany but also abroad – which in turn is an important prerequisite for the acceptance of such a mobility concept.

Business Benefits

  • The intelligent ubitricity solution offers charging-point provider’s savings of up to 90 percent both in terms of acquisition and ongoing operating cost.
  • Powerful, reliable and flexible M2M platform
  • Individual adaptation of the platform to the requirements of the intelligent charging solution for electric cars has been realised.
  • International availability and Worldwide network coverage
 The flexible and powerful M2M platform of Vodafone is a central component of our solution and our business model in Germany. Knut Hechtfischer, CEO and co-founder, ubitricity

SolarCity & Tesla create residential solar battery backup system

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SolarCity incorporates new Tesla battery to create turnkey residential solar battery backup system – system cost reductions are over 60% lower than previous product; cost breakthrough also results in greater savings for business and government customers.

In an important step toward the distributed electricity grid of the future, SolarCity will make more affordable battery storage available to residential, business and government customers across the U.S., and remote communities around the world. SolarCity Co-founder and Chief Technology Officer Peter Rive provided additional detail about the rollout tonight in a post on the company’s blog.

For businesses and government organizations, SolarCity will incorporate the new Tesla battery into its DemandLogic energy storage system to significantly increase the utility cost savings customers can realize from using stored solar electricity.  DemandLogic, which is being adopted by several of the largest retail, biotech and Internet companies in the U.S., allows businesses to reduce energy costs by using stored electricity to reduce peak demand, and can also provide backup power during grid outages. DemandLogic’s management software automates the discharge of stored energy to optimize savings on utility demand charges for customers.

For remote communities around the world, SolarCity will incorporate the new Tesla battery into its GridLogicmicrogrid service. GridLogic combines distributed energy resources—solar energy systems, batteries and controllable load—to enable a cleaner, more resilient and more affordable way of providing power. SolarCity’s microgrid service will ensure that any community anywhere in the world vulnerable to power outages and high energy costs—including remote or island communities, hospitals and military bases—can have dependable, clean power off-grid, when the grid is down. GridLogic can operate either in conjunction with or independently of the utility grid.

For residential solar customers, SolarCity will provide a turnkey battery backup service that includes permitting, installation and ongoing monitoring. Equipment includes Tesla’s home battery, the Tesla Powerwall, which consists of an advanced hybrid solar/battery, inverter and monitoring and control systems. The fully-installed system stores electricity generated from the solar power system, using that power to automatically provide backup power during utility grid outages. SolarCity’s battery backup service replaces noisy, dirty fossil fuel generators with zero-emission storage technology. Roughly the size of a suitcase, the sleek, enclosed pack can be easily mounted on indoor or outdoor walls.  When a power outage occurs, the control system immediately begins feeding power to the home from the solar system and the battery to continue operating the most commonly needed, eligible circuits selected by the customer, including the refrigerator, lighting, computer, alarm system and electrical outlets. When the battery is depleted, it can be recharged by solar power even if the outage continues for multiple days.

Incorporating Tesla’s new battery technology, SolarCity is now able to configure a solar system (along with other energy management technologies) as a stand-alone, off-grid power supply.  SolarCity plans to first offer these off-grid systems to eligible Hawaii customers that might otherwise be prevented from using solar power.

The combination of solar power generation and battery storage will make the utility grid safer and less susceptible to service interruptions, and will also lower the cost to expand and maintain the grid. SolarCity’s energy storage rollout supports efforts already underway in multiple states to integrate aggregated storage capacity with existing grid resources. A distributed network of solar power systems and energy storage devices can also make renewable energy available on demand to utilities and their customers. In the future, distributed solar and storage resources are likely to become marketable assets, and homeowners and businesses may be able to collect revenues by providing self-generated, clean energy to others.

SolarCity will begin taking orders for the new energy storage systems on May 1st and expects to begin installing customers in October. SolarCity will initially make its battery backup options available only to new solar customers in the company’s current service area, and will accommodate customers on a first-come, first-served basis. The company plans to make the battery backup system available to its existing solar customers later this year. Off-grid solutions offered in Hawaii are expected to become available in the first half of 2016. Potential customers can call 888-765-2489 or visit www.solarcity.com/batterybackup to inquire about pricing or reserve a system.

Contractor licenses: www.solarcity.com/company/contractor-licenses

 

New lithium-ion battery design that’s 2,000 times more powerful, recharges 1,000 times faster

Researchers at the University of Illinois at Urbana-Champaign have developed a new lithium-ion battery technology that is 2,000 times more powerful than comparable batteries. According to the researchers, this is not simply an evolutionary step in battery tech, “It’s a new enabling technology… it breaks the normal paradigms of energy sources. It’s allowing us to do different, new things.”

Currently, energy storage is all about trade-offs. You can have lots of power (watts), or lots of energy (watt-hours), but you can’t generally have both. Supercapacitors can release a massive amount of power, but only for a few seconds; fuel cells can store a vast amount of energy, but are limited in their peak power output. This a problem because most modern applications of bleeding-edge tech — smartphones, wearable computers, electric vehicles — require large amounts of power and energy. Lithium-ion batteries are currently the best solution for high-power-and-energy applications, but even the best li-ion battery designs demand that industrial designers and electronic engineers make serious trade-offs when creating a new device.

Which brings us neatly onto the University of Illinois’ battery, which has a higher power density than a supercapacitor, and yet comparable energy density to current nickel-zinc and lithium-ion batteries. According to the university’s press release, this new battery could allow for wireless devices to transmit their signals 30 times farther — or, perhaps more usefully, be equipped with a battery that’s 30 times smaller. If that wasn’t enough, this new battery is rechargeable — and can be charged 1,000 times faster than conventional li-ion batteries. In short, this is a dream battery. (See: DoE calls for a chemical battery with 5x capacity, within 5 years – can it be done?)

Diagram illustrating the University of Illinois' 3D anode/cathode fabrication

These huge advances stem from a brand new cathode and anode structure, pioneered by the University of Illinois researchers. In essence, a standard li-ion battery normally has a solid, two-dimensional anode made of graphite and a cathode made of a lithium salt. The new Illinois battery, on the other hand, has a porous, three-dimensional anode and cathode. To create this new electrode structure, the researchers build up a structure of polystyrene (Styrofoam) on a glass substrate, electrodeposit nickel onto the polystyrene, and then electrodeposit nickel-tin onto the anode and manganese dioxide onto the cathode. The diagram above does a good job of explaining the process.

The end result is that these porous electrodes have a massive surface area, allowing for more chemical reactions to take place in a given space, ultimately providing a massive boost to discharge speed (power output) and charging. So far, the researchers have used this tech to create a button-sized microbattery, and you can see in the graph below how well their battery compares to a conventional Sony CR1620 button cell. The energy density is slightly lower, but the power density is 2,000 times greater. On the opposite end of the bleeding-edge spectrum — increased energy density, but lower power density — thenIBM’s lithium-air battery currently leads the pack.

Energy density vs. power density for a variety of battery technologies, including University of Illinois' new microstructured anode/cathode li-ion battery

In real-world use, this tech will probably be used to equip consumer devices with batteries that are much smaller and lighter — imagine a smartphone with a battery the thickness of a credit card, which can be recharged in a few seconds. There will also be plenty of applications outside the consumer space, in high-powered settings such as lasers and medical devices, and other areas that normally use supercapacitors, such as Formula 1 cars and fast-recharge power tools. For this to occur, though, the University of Illinois will first have to prove that their technology scales to larger battery sizes, and that the production process isn’t prohibitively expensive for commercial production. Here’s hoping.

Research paper: doi:10.1038/ncomms2747 – “High-power lithium ion microbatteries from interdigitated three-dimensional bicontinuous nanoporous electrodes”

Source: Sebastian Anthony

Co-Star supply Power-Sonic Rechargeable batteries