Synthesis and research of (Ni _{0. 1} Co _{0 . 3} Mn _{0 .6} ) ₃ O ₄ as lithium‐ion battery conversion‐type anode using spent LiNi _{0 . 6} Co _{0 . 2} Mn _{0 . 2} O ₂ batteries

Abstract

LiNi1-x-yCoxMnyO2 lithium-ion battery, as the most installed battery of new energy vehicles, is facing the problem of large-scale scrap. In this paper, (Ni0.1Co0.3Mn0.6)3O4 anode material with a microsphere structure was successfully synthesized by carbonate coprecipitation method, which was obtained by recycling spent LiNi0.6Co0.2Mn0.2O2 lithium-ion batteries through hydrometallurgy technology. This method eliminates the cumbersome separation steps, reduces the process cost, and realizes efficient recovery of valuable metals. The (Ni0.1Co0.3Mn0.6)3O4 anode material was characterized by inductively coupled plasma, X-ray photoelectron spectroscopy, X-ray diffraction analysis, scanning electron microscopy, and electrochemical measurements. The results show that (Ni0.1Co0.3Mn0.6)3O4 anode material has a microsphere structure with high crystallinity and exhibits a high discharge capacity (1575 mAh·g−1 at 100 mA·g−1) and a good cycling performance (659 mAh·g−1 at 100 mA·g−1 after 50 cycles). This work provides a new idea for the recycling of spent LiNi1-x-yCoxMnyO2 batteries.