Three-electron reversible redox for a high-energy fluorophosphate cathode: Na3V2O2(PO4)2F

被引：19

作者：

Peng, Manhua ^{[1
]}

Zhang, Dongtang ^{[1
]}

Wang, Xiayan ^{[1
]}

Xia, Dingguo ^{[2
]}

Sun, Yugang ^{[3
]}

Guo, Guangsheng ^{[1
]}

机构：

[1] Beijing Univ Technol, Dept Chem & Chem Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China

[2] Peking Univ, Coll Engn, Key Lab Theory & Technol Adv Batteries Mat, Beijing 100871, Peoples R China

[3] Temple Univ, Dept Chem, Philadelphia, PA 19122 USA

来源：

CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 27期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

ION BATTERY CATHODES; ELECTROCHEMICAL PERFORMANCE; GRAPHENE; 1ST-PRINCIPLES; NANOPARTICLES;

D O I：

10.1039/c9cc00504h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A three-electron structural reaction for Na3V2O2(PO4)(2)F (Na3VOPF) in space group I4/mmm shows a priori stabilisation in terms of long-life in the voltage range of 2.0-4.5 V, with embedding of more than one sodium ion to generate Na5VOPF upon discharge to 1.0 V in the first cycle, thereby increasing the specific capacity from approximate to 170 mA h g(-1). The capacity of the crystals was 180 mA h g(-1) after 20 cycles. The results provide a probable route to improve fluorophosphate cathode performance.

引用

页码：3979 / 3982

页数：4

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