The research team led by Professor Yan Wang from Worcester Polytechnic Institute in the US published a groundbreaking battery recycling technology in *Energy Storage Materials*, developing a new scalable hydrometallurgical process that efficiently converts nickel-poor mixed cathode materials from spent lithium-ion batteries into high-performance nickel-rich polycrystalline cathodes. This technology achieves a recovery rate of over 92% for key metals such as nickel, cobalt, and manganese. The performance of batteries made from recycled materials is comparable to that of those made from virgin materials. After 500 cycles, commercial pouch batteries retain 88% of their capacity, and after 900 cycles, they still maintain over 85%. Meanwhile, this technology saves 8.6% more energy and reduces carbon emissions by 13.9% compared to traditional processes. This innovative technology, which combines environmental protection with economic benefits, not only addresses the challenge of battery waste disposal but also provides crucial technological support for building a sustainable battery supply chain by establishing a closed-loop cycle of "waste-to-high-performance materials". It is expected to significantly reduce reliance on the mining of key raw materials and promote the green development of the clean energy industry.
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