Problem to be solved: to provide a method of recovering graphite from a lithium ion cell or battery.A method of recovering graphite from a lithium ion cell or battery is a method of including the followingForming a disassembled lithium ion cell or battery by dissolving the lithium ion cell or battery and isolating the anode from the cathode;The decomposed lithium-ion cell or battery is mixed with acid at temperatures of 10 to 100 degrees Celsius to contain graphite and lithium, and optionally soluble organic matter, soluble metal (lithium).Forming an acid solution containing at least one of the suspended solids; and The acid has a pH of 2.5 or less and contains hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid, or combinations thereof; AndSeparating graphite from said acid solution.No selection
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