煅烧
阴极
电化学
材料科学
烧结
钠
化学工程
锂(药物)
离子
无机化学
化学
电极
冶金
物理化学
催化作用
有机化学
内分泌学
工程类
医学
作者
Shilin Su,Xiaoyu Bai,Lei Ming,Zhiming Xiao,Chunhui Wang,Bao Zhang,Cheng Liao,Xing Ou
标识
DOI:10.1016/j.jssc.2022.122916
摘要
Sodium-ion batteries are thought to be ideal alternatives to Lithium-ion batteries due to their similar electrochemical properties. However, several technique obstacles in cathode materials still impede the commercialized adoption of Sodium-ion batteries. Herein, the Mg-doping P2-type Na0.67Mn0.7Ni0.2Mg0.1O2 cathode materials were synthesized via a two-step process, including sol-gels and solid-state reaction method. This paper pays much attention to the optimal calcination temperature in the synthesis procedure and its effects are subsequently investigated. According to the results, under a series of calcination temperatures from 800 to 950 °C, Na0.67Mn0.7Ni0.2Mg0.1O2 cathode materials shows different particle sizes and crystalline structures, exhibiting varied electrochemical properties. Among them, samples calcinated at 900 °C display a high specific discharge capacity of 120.9 mAh g−1, and a stable cycling performance of 67.2% retention at 1 C rate for 100 cycles. The results suggest that calcination temperature at approximately 900 °C could effectively promote the electrochemical performance, which provides a good reference for the synthesis of cathode materials in sodium-ion batteries.
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