Ni-rich LiNi0.6Co0.2Mn0.2O2 microrod with hierarchical structure synthesized by template reaction as cathode material for lithium-ion battery.

In this work, one-dimensional Ni-rich LiNi_0.6Co_0.2Mn_0.2O₂ microrod cathode material for lithium-ion battery has been firstly prepared by a simple stepwise oxalate co-precipitation method. Rod-like CoC₂O₄·2H₂O formed in the first process is served as template for the formation of MC₂O₄·2H₂O (M=Ni, Co, Mn) precursor, and the morphology of rod-like is maintained after the heat treatment with Li₂CO₃. The crystalline structure and morphology of the samples are characterized by XRD, SEM, and TEM/HRTEM. The electrochemical performances are evaluated by galvanostatic charge/discharge tests. With the beneficiation of micro/nanostructure, the LiNi_0.6Co_0.2Mn_0.2O₂ microrod cathode material shows an initial discharge capacity of 162, 134, 117, and 105 mAh g⁻¹ at 0.1 °C, 1 °C, 3 °C, and 5 °C, respectively, and maintains 72.8% of its initial discharge capacity after 100 cycles at 1 °C. [ABSTRACT FROM AUTHOR]