Ultra-Thin AlPO₄ Layer Coated LiNi_0.7Co_0.15Mn_0.15O₂ Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries.

ABSTRACT: Side-reactions in LiNi_1-x-yCo _x Mn _y O₂ (0≤_- x+y≤1) cathode materials are one kind of the problems that would deteriorate the surface structure and the electrochemical stabilities of the cathodes, especially when they are working at high cut-off voltages and high temperatures. In this study, an ultrathin (~10 nm) AlPO₄ coating layer was fabricated through a two-step "feeding" process on LiNi_0.7Co_0.15Mn_0.15O₂ (NCM) cathode materials. The structure and chemical composition of the AlPO₄ coating were studied by XRD, SEM, TEM, and XPS characterizations. Further electrochemical testing revealed that the AlPO₄-coated LiNi_0.7Co

SUBMITTER: Li W 

PROVIDER: S-EPMC7378848 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature