氧化还原
阴极
氧气
合理设计
材料科学
氧化物
纳米技术
结构母题
化学
无机化学
物理化学
有机化学
生物化学
冶金
作者
Jiajie Liu,Rui Qi,Changjian Zuo,Cong Lin,Wenguang Zhao,Ni Yang,Jianyuan Li,Junliang Lu,Xin Chen,Jimin Qiu,Mihai Chu,Ming‐Jian Zhang,Cheng Dong,Yinguo Xiao,Haibiao Chen,Feng Pan
出处
期刊:Nano Energy
[Elsevier BV]
日期:2021-06-16
卷期号:88: 106252-106252
被引量:38
标识
DOI:10.1016/j.nanoen.2021.106252
摘要
The capacity of the layered oxide cathode in a sodium ion battery can be increased by harnessing anionic redox. However, the extra capacity induced by anionic redox comes at the expense of reversibility due to the irreversible oxidation and subsequent loss of oxygen. Here, we report a universal strategy of improving the reversibility of oxygen redox in sodium layered oxides by regulating the superstructural motifs. The intrinsic chemical properties of superstructural motifs can be directionally altered by modulating the interionic interactions, and the rational integration of selected superstructural motifs can result in advanced materials with target performance. As a demonstration, a novel cathode comprising both [email protected]6 and [email protected]6 superstructural motifs is designed and synthesized with inherently inhibited oxygen loss and significantly improved cyclic reversibility. Detailed characterizations on the atomic-level structure and chemistry of materials revealed that the pinning effect of the [email protected]6 superstructural motif is critical to maintain a stable layered structure. The findings from this work open up new routes for the design and development of next-generation high energy cathodes with target performance.
科研通智能强力驱动
Strongly Powered by AbleSci AI