Researcher at TU Graz demonstrates in Nature Materials that it is possible to combine the high-energy density of batteries with the high-power output of super capacitors in a single system – thanks to liquid energy storage materials.
Batteries and super capacitors are electrochemical energy storage media, but they are as different as night and day. Both are capable of energy storage and targeted energy release – and yet there are major differences between the two. Batteries store very large amounts of energy that is released slowly but constantly. By contrast, super capacitors can only store small amounts of energy, but they release this energy much faster and more powerfully with large short-term peak currents.
Stefan Freunberger at TU Graz together with a group of researchers from Université de Montpellier in Southern France had a sudden flash of insight. Why not exploit the benefits of batteries and super capacitors simultaneously and combine them in some kind of energy hybrid, they asked themselves. In the current issue of renowned scientific journal Nature Materials the group introduces its approach, describing a liquid energy storage material for the first time in a European Research Council (ERC) sponsored study. While the energy density of this material is comparable to that of a battery, its power output equals that of a super capacitor.
Ions with an urge to move
“Batteries release energy so slowly and take so long to charge because their energy storage materials are solid. This make it difficult for the ions to move. But as the ions in a super capacitor move in a liquid, they are much more mobile than in a solid body,” explains Stefan Freunberger from the Institute of Chemistry and Technology of Materials at TU Graz. The novel redox active ionic liquid developed by Freunberger in co-operation with the French colleagues consists of an organic salt that is liquid at a temperature of just below 30 °C – only slightly above room temperature. Similar to a solid storage medium this liquid can store many ions, but allows them to be much more mobile.
The sudden flash of insight of Freunberger and colleagues culminated in a first approach to create an integrated energy supply system that offers a constant energy supply with high-power output. In some cases we are still faced with an either/or decision. Automatic doors, for example in trams or trains, are typical candidates for super capacitors. Energy is only needed for a very short time but when it is, a high-power output is of the essence. In other cases batteries are clearly the first choice. “But our principle of an energy hybrid can offer enormous advantages, for example when applied in electric vehicles. So far, electric vehicles often carry a combination of different battery types or battery systems together with super capacitors. If we had a single system that combines the benefits of both energy storage types, we could save considerable space and resources,” remarks Freunberger.
Learn more: Energy hybrid: Battery meets supercapacitor
Receive an email update when we add a new ENERGY HYBRID article.
The Latest on: Energy hybrid
via Google News
The Latest on: Energy hybrid
- Hybrid boilers with domestic waste to energy units nearer production on December 17, 2018 at 9:39 am
- Origin Energy to redeem €1bn hybrid with bank debt on December 16, 2018 at 11:49 pm
This content is available to IFRAsia.com subscribers. Please login if you have a subscription. Alternatively, you can request a trial, or contact your IFRAsia account manager for more information. If ... […]
- ‘Create hybrid source of new energy’ on December 14, 2018 at 2:37 pm
Nagpur: For a sustainable tomorrow, the nation should not just rely on renewable energy and completely discard fossil fuels, but find ingenious solutions to use them both, said scientist RR Sonde ... […]
- Hybrid and fully electric vehicles now considered as serious alternatives to petrol on December 13, 2018 at 10:14 pm
More than half (52.2%) of Australian drivers would now seriously consider buying a hybrid vehicle, up from 48.8% over the last year. Fully electric vehicles are also showing increased interest, up fro... […]
- ENGIE team up with Arval to simplify access to EVs on December 13, 2018 at 4:02 am
Global energy and EV charging infrastructure company ENGIE has partnered with global specialist in corporate vehicle fleet leasing Arval to announce the launch of a new green transport offer that aims ... […]
- 48V Micro Hybrid Market 2018 Global Analysis By Key Players – Audi, BMW, Toyota, BYD Auto, Daimler, Daimler on December 11, 2018 at 2:50 am
The 48V Micro Hybrid industry has also suffered a certain impact, but still maintained a relatively optimistic growth, the past four years, 48V Micro Hybrid market size to maintain the average annual ... […]
- Outlander plug-in hybrid shows why we need to home in on 'electric' on December 7, 2018 at 5:30 pm
But there are legitimate issues and I think no review of an 'electrified' car (in this case a plug-in hybrid) would be relevant without ... decide how much regenerative braking energy you wish to capt... […]
- Just two bidders for India’s 1.2 GW wind-solar hybrid project on December 6, 2018 at 4:58 am
Softbank-backed SB Energy was awarded 450 MW at Rs 2.67/kWh (US$0.038), while Adani Green Energy won 390 MW at Rs 2.69/kWh. These were the only two bidders for the 1.2 GW wind-solar auction. A total o... […]
- Adani Green Energy, SB Energy win 840 MW at wind-solar hybrid auction on December 5, 2018 at 10:46 pm
Adani Green Energy and SB Energy have reportedly won 840 MW of the 1,200 MW put on sale at the first wind-solar hybrid auction conducted by the Solar Energy Corporation of India (SECI). The company ha... […]
via Bing News