Used EV batteries can be turned into fertilizers with this new method

Researchers at the University of Wisconsin-Milwaukee, led by Professor Deyang Qu, have developed a novel method to recycle used lithium iron phosphate (LFP) electric vehicle (EV) batteries into fertilizers. This process employs an ion-exchange technique to recover lithium by replacing it with potassium, leaving behind key fertilizer components such as phosphorus, potassium, and nitrogen. The innovation addresses the growing challenge of EV battery waste, particularly as conventional recycling is costly and yields limited value beyond lithium recovery. By converting battery materials into fertilizers, the method not only reduces environmental waste but also supports agriculture, offering a potentially sustainable economic solution. The research, supported by UWM and the USDA Agricultural Research Service, aims to scale up fertilizer production for field testing, including planned trials on tomato crops. This approach could create a domestic supply of essential fertilizer minerals, currently mostly imported, while reducing the energy footprint associated with mining and transportation. The method is particularly relevant given the expected surge in expired lithium-ion batteries after about a decade