中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 31 No. 7 July 2021 |
（Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Recycling, College of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China）
Abstract:P2-type Na2/3Fe1/2Mn1/2O2 was synthesized by a facile sol-gel method, and the effect of calcination temperature on the structure, morphology and electrochemical performance of samples was investigated. The results show that the sample obtained at 900 °C is pure P2-type Na2/3Fe1/2Mn1/2O2 phase with good crystallization, which consists of hexagon plate-shaped particles with the size and thickness of 2-4 μm and 200-400 nm, respectively. The sample exhibits an initial specific discharge capacity of 243 mA·h/g at a current density of 26 mA/g with good cycling stability. The high specific capacity indicates that P2-type Na2/3Fe1/2Mn1/2O2 is a promising cathode material for sodium- ion batteries.
Key words: sodium-ion battery; cathode material; Na2/3Fe1/2Mn1/2O2; electrochemical performance; sol-gel method
