Alkaline Excess Strategy to NASICON-Type Compounds towards Higher-Capacity Battery Electrodes

被引：42

作者：

de Boisse, Benoit Mortemard ^{[1
,2
]}

Ming, Jun ^{[1
,2
]}

Nishimura, Shin-ichi ^{[1
,2
]}

Yamada, Atsuo ^{[1
,2
]}

机构：

[1] Univ Tokyo, Sch Engn, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Kyoto Univ, Elements Strategy Initiat Catalysts & Batteries, Nishikyo Ku, Kyoto 6158245, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2016年 / 163卷 / 07期

关键词：

SODIUM-ION BATTERIES; CARBON-COATED NA3V2(PO4)(3); ELECTROCHEMICAL PERFORMANCE; CATHODE MATERIAL; MECHANISM;

D O I：

10.1149/2.0041608jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The sodium excess strategy was applied to NASICON-type compound to form Na3+xM2-x3+Mx'(2+)(PO4)(3), towards a new family of sodium-ion battery cathode materials with increased reversible capacity. Here we chose M3+ = V3+ and M'(2+) = Fe2+ and successfully synthesized sodium enriched mixed valence compounds up to x = 0.5, i.e., Na3.5V1.53+Fe0.52+(PO4)(3). It shows reversible Na+ (de) intercalation centred at 3.4 V vs. Na/Na+, involving the Fe3+/Fe2+, V4+/V3+ and V5+/V4+ redox couples, demonstrating that the excess sodium contributes to the electrode reaction. (C) 2016 The Electrochemical Society. All rights reserved.

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页码：A1469 / A1473

页数：5

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