| CPC H01M 10/54 (2013.01) [C22B 1/24 (2013.01); C22B 7/007 (2013.01); C22B 23/0423 (2013.01); C22B 23/043 (2013.01); C22B 23/0438 (2013.01); C22B 26/22 (2013.01)] | 13 Claims |

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1. A method of forming a cathode material comprising:
forming an aqueous acidic solution of cathode material salts comprising nickel salts, manganese salts, and cobalt salts, each having a respective concentration, the aqueous acidic solution formed from aggregate cathode materials and anode materials of spent cells of a lithium ion battery recycling stream;
adjusting the concentration of the cathode metal salts with additional metal salts to obtain a selected ratio; and
precipitating a cathode material precursor from the aqueous acidic solution,
wherein the cathode material salts are obtained from leaching a granular mass of crushed exhausted lithium ion batteries with an acidic leach agent.
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