插层(化学)
阴极
过渡金属
离子
材料科学
相变
氧化物
金属
组态熵
化学工程
化学物理
化学
无机化学
纳米技术
热力学
物理化学
冶金
物理
工程类
催化作用
有机化学
生物化学
作者
Chenglong Zhao,Feixiang Ding,Yaxiang Lu,Liquan Chen,Yong‐Sheng Hu
标识
DOI:10.1002/anie.201912171
摘要
Abstract Material innovation on high‐performance Na‐ion cathodes and the corresponding understanding of structural chemistry still remain a challenge. Herein, we report a new concept of high‐entropy strategy to design layered oxide cathodes for Na‐ion batteries. An example of layered O3‐type NaNi 0.12 Cu 0.12 Mg 0.12 Fe 0.15 Co 0.15 Mn 0.1 Ti 0.1 Sn 0.1 Sb 0.04 O 2 has been demonstrated, which exhibits the longer cycling stability (ca. 83 % of capacity retention after 500 cycles) and the outstanding rate capability (ca. 80 % of capacity retention at the rate of 5.0 C). A highly reversible phase‐transition behavior between O3 and P3 structures occurs during the charge‐discharge process, and importantly, this behavior is delayed with more than 60 % of the total capacity being stored in O3‐type region. Possible mechanism can be attributed to the multiple transition‐metal components in this high‐entropy material which can accommodate the changes of local interactions during Na + (de)intercalation. This strategy opens new insights into the development of advanced cathode materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI