L R AS Published on Monday 5 July 2021 - n° 369 - Categories:R&D
R & D Highlights - 2: More powerful cathode at Berkeley, new CRIS membrane in Hong Kong; better recycled perovskite
R & D Highlights - 2: More powerful cathode at Berkeley, new CRIS membrane in Hong Kong; better recycled perovskite
A group of scientists led by Lawrence Berkeley National Laboratory
in the US has been working with a type of material called disordered rock salt with excess lithium (DRX). They have developed a cathode design that relies on a different type of reaction than the lithium-ion batteries produced today, which could potentially hold more lithium ions, and create a range of potential materials to reduce reliance on cobalt, nickel and other expensive materials.
DRX materials have enormous compositional flexibility. This is very powerful because you can use all sorts of abundant metals in a DRX cathode
https://www.pv-magazine.com/2021/06/30/new-cathode-design-promises-battery-sustainability/
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Researchers in Hong Kong have applied a new charge-reforced, ion-selective membrane (CRIS) to a polysulphide-iodide-based redox flow battery. The redox flow battery showed a capacity degradation rate of only 0.005% per day for 1,200 cycles, fifteen consecutive hours of autonomy, and a lifetime of 2,000 cycle hours, or about three months.
https://www.pv-magazine.com/2021/06/30/sulphur-based-redox-flow-battery-with-15-consecutive-hours-of-runtime/
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If a proper recycling strategy was applied to perovskite cells and a better recycled perovskite cell architecture was developed, therovskite cells, the energy payback time could be reduced to one month, compared to 1.3 to 2.4 years for crystalline silicon panels.
The scientists attempted to show that recycling strategies could improve the durability and energy payback time of photovoltaic panels, given the current pace of technological development. Energy payback is the time it takes for solar panels to produce the same amount of energy as was used to manufacture them. Perovskite panels generally last longer than their energy recovery time.
https://www.pv-magazine.com/2021/06/30/proper-recycling-could-help-perovskite-modules-to-outcompete-rivals/
