A green process for recycling and synthesis of cathode materials LiMn₂O₄ from spent lithium-ion batteries using citric acid.

ABSTRACT: In view of the reducing reagent consumption and secondary pollution caused by recycling spent lithium-ion batteries (LIBs), a relatively green process has been proposed, because the complex process to separate metals and the use of a large number of environmentally unfriendly chemical reagents are not involved. This process combines acid leaching with the resynthesis of the cathode material to recycle LiMn₂O₄ (LMO) from spent LIBs. The leaching efficiencies of Li and Mn exceeded 94% under the conditions of 1.0 M citric acid concentration, solid-liquid ratio of 60 g L^-1, and 60 min leaching time. After the leaching process, spinel LMO was successfully resynthesized by the sol-gel process using leachate. The sample calcined at 700 °C has the best electrochemi

SUBMITTER: Wang J 

PROVIDER: S-EPMC9389622 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature