Grain Morphology and Microstructure Control in High‐Stable Ni‐Rich Layered Oxide Cathodes

• DOI: 10.1002/adfm.202212849
• Publication Date: 2023-04-26T03:41:50Z
• Authors: Lin Wang; Baofu Zhu; Dongdong Xiao; Xu Zhang; Boya Wang; Haifeng Li; Tianhao Wu; Shiqi Liu; Haijun Yu
• Keywords: Nanometre

Abstract Ni‐rich layered oxides are promising cathode material for high‐energy‐density lithium‐ion batteries (LIBs). However, they suffer from poor capacity retention due to unstable structures. Herein, a strategy of high‐valence W doping is put forward tune the nanometer‐sized crystal domains and reshape primary particle textures, which can stabilize structure against formation microcracks improve electrochemical performance. The oxide with 0.5 mol% doped delivers high‐capacity 91.6% up 300 cycles under 1 C. Such an improved performance ascribed pre‐introduced spinel rock‐salt domains, remarkably stability, radially alignment particles, effectively reduce anisotropic mechanical strain in deep charge states. This study sheds light on design high‐performance Co‐less materials through adjustment microstructures via small amount suitable dopants.