Research: efficiency of lithium-ion batteries increases by 53% after recycling

New research from the US Advanced Battery Consortium (USABC) and A123 Systems finds that recycled lithium-ion batteries

batteries are becoming more efficient thannew. According to their findings, published in the journal Joule, batteries with recycled cathodes may perform as well as or better than batteries using modern materials.

The research team tested the batteries withrecycled cathodes NMC111 - the most common type of cathodes containing nickel, manganese and cobalt. The cathodes were manufactured using a patented recycling technology by Battery Resourcers.

The recycled material has a more porous structure, which allows lithium ions to pass through better. Therefore, the life of recycled batteries has increased by 53%.

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Recycled batteries have been tested inindustrial production. The researchers made standard cells charged with materials with the same density as batteries for electric vehicles. The results were no worse than those of modern batteries.

Their technology involves shredding batteries andremoval of steel cases, aluminum and copper wires, plastics for subsequent processing. The remaining mass dissolves, and graphite, carbon and impurities are filtered or chemically separated. Using a patented chemical technology, nickel, manganese and cobalt are mixed in the right proportions to produce cathode powder.

The next stage of development for researchers iscreating a battery for electric vehicles. Most large companies recycle for consumer electronics, but recycling for electric vehicles is considered too complex and expensive. USABC researchers want to present their method by 2023.

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