A Hydrostable Cathode Material Based on the Layered P2@P3 Composite that Shows Redox Behavior for Copper in High-Rate and Long-Cycling Sodium-Ion Batteries

被引：132

作者：

Yan, Zichao ^{[1
]}

Tang, Liang ^{[2
]}

Huang, Yangyang ^{[4
]}

Hua, Weibo ^{[5
]}

Wang, Yong ^{[3
]}

Liu, Rong ^{[7
]}

Gu, Qinfen ^{[6
]}

Indris, Sylvio ^{[5
]}

Chou, Shu-Lei ^{[1
]}

Huang, Yunhui ^{[4
]}

Wu, Minghong ^{[2
]}

Dou, Shi-Xue ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Innovat Campus,Squires Way, North Wollongong, NSW 2522, Australia

[2] Shanghai Univ, Shanghai Inst Appl Radiat, Shanghai 200444, Peoples R China

[3] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China

[4] Tongji Univ, Sch Mat Sci & Engn, Inst New Energy Vehicles, Shanghai 201804, Peoples R China

[5] KIT, IAM, D-76344 Eggenstein Leopoldshafen, Germany

[6] Australian Synchrotron, 800 Blackburn Rd, Clayton, Vic 3168, Australia

[7] Western Sydney Univ, Locked Bag 1797, Penrith, NSW 2751, Australia

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 05期

基金：

中国国家自然科学基金;

关键词：

hydrostable cathodes; layered structures; sodium-ion batteries; zinc; ELECTROCHEMICAL PERFORMANCE; HIGH-VOLTAGE; HIGH-POWER; P2-TYPE; DIFFUSION; LIFE;

D O I：

10.1002/anie.201811882

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Low-cost layered oxides free of Ni and Co are considered to be the most promising cathode materials for future sodium-ion batteries. Biphasic Na0.78Cu0.27Zn0.06Mn0.67O2 obtained via superficial atomic-scale P3 intergrowth with P2 phase induced by Zn doping, consisting of inexpensive transition metals, is a promising cathode for sodium-ion batteries. The P3 phase as a covering layer in this composite shows not only in excellent electrochemical performance but also its tolerance to moisture. The results indicate that partial Zn substitutes can effectively control biphase formation for improving the structural/electrochemical stability as well as the ionic diffusion coefficient. Based on in situ synchrotron X-ray diffraction coupled with electron-energy-loss spectroscopy, a possible Cu2+/3+ redox reaction mechanism has now been revealed.

引用

页码：1412 / 1416

页数：5

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