Ni-rich LiNi 0.6 Co 0.2 Mn 0.2 O 2 microrod with hierarchical structure synthesized by template reaction as cathode material for lithium-ion battery

In this work, one-dimensional Ni-rich LiNi 0.6 Co 0.2 Mn 0.2 O 2 microrod cathode material for lithium-ion battery has been firstly prepared by a simple stepwise oxalate co-precipitation method. Rod-like CoC 2 O 4 ·2H 2 O formed in the first process is served as template for the formation of MC 2 O 4 ·2H 2 O (M=Ni, Co, Mn) precursor, and the morphology of rod-like is maintained after the heat treatment with Li 2 CO 3 . 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 0.6 Co 0.2 Mn 0.2 O 2 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.