Anionic Redox Reaction-Induced High-Capacity and Low-Strain Cathode with Suppressed Phase Transition

被引：437

作者：

Rong, Xiaohui ^{[1
,2
]}

Hu, Enyuan ^{[3
]}

Lu, Yaxiang ^{[1
]}

Meng, Fanqi ^{[1
]}

Zhao, Chenglong ^{[1
]}

Wang, Xuelong ^{[1
,3
]}

Zhang, Qinghua ^{[1
]}

Yu, Xiqian ^{[1
,2
]}

Gu, Lin ^{[1
]}

Hu, Yong-Sheng ^{[1
,2
,6
]}

Li, Hong ^{[1
,6
]}

Huang, Xuejie ^{[1
]}

Yang, Xiao-Qing ^{[3
]}

Delmas, Claude ^{[4
,5
]}

Chen, Liquan ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Lab Adv Mat & Electron Microscopy,Inst Phys, Key Lab Renewable Energy,Beijing Key Lab New Ener, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100190, Peoples R China

[3] Brookhaven Natl Lab, Div Chem, Upton, NY 11973 USA

[4] CNRS, ICMCB, 87 Ave Dr Albert Schweitzer, F-33608 Pessac, France

[5] Univ Bordeaux, 87 Ave Dr Albert Schweitzer, F-33608 Pessac, France

[6] Yangtze River Delta Phys Res Ctr Co Ltd, Liyang 213300, Peoples R China

来源：

JOULE | 2019年 / 3卷 / 02期

基金：

中国国家自然科学基金;

关键词：

ION BATTERIES; OXYGEN; DEINTERCALATION; PARTICIPATION; INTERCALATION; EVOLUTION; P2-TYPE; ORIGIN;

D O I：

10.1016/j.joule.2018.10.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Layered metal oxides have attracted widespread attention as cathodes for Na-ion batteries (NIBs) because of easy synthesis, high specific capacity, and high energy density. However, most reported layered oxides suffer from complex phase transitions upon a large amount of Na deintercalation. Here we report a P2-type Na-0.72[Li0.24Mn0.76]O-2, exhibiting exceptionally high initial charge capacity of similar to 210 mAh/g (0.72 Na) based on a pure anionic redox reaction (ARR). Surprisingly, global P2 structure can be maintained with minimal volume change (1.35%) upon complete removal of Na+ ions. This is due to the reduced Coulombic repulsion associated with ARR and consequent suppression of the phase transition as observed in other P2 materials. Here we reveal for the first time that ARR has the functionality of stabilizing the structure, in addition to its role in increasing its already known capacity. This would pave the way for the further improvement of high-energy-density NIBs.

引用

页码：503 / 517

页数：15

共 35 条

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