An approach to overcome first cycle irreversible capacity in P2-Na2/3[Fe1/2Mn1/2]O2

被引：121

作者：

Singh, Gurpreet ^{[1
]}

Acebedo, Begona ^{[1
]}

Casas Cabanas, Montse ^{[1
]}

Shanmukaraj, Devaraj ^{[1
]}

Armand, Michel ^{[1
]}

Rojo, Teofilo ^{[1
]}

机构：

[1] CIC ENERGIGUNE, Minano 01510, Spain

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2013年 / 37卷

关键词：

Sodium ion battery; Layered oxide; Cathode; Irreversible capacity; NA-ION BATTERIES; ENERGY-STORAGE; SODIUM; INTERCALATION;

D O I：

10.1016/j.elecom.2013.10.008

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The Earth-abundant high capacity Na-2/3[Fe1/2Mn1/2]O-2 sodium-ion battery cathode material has been synthesized by conventional solid state synthesis. X-ray diffraction measurement shows the formation of the single phase Na-2/3[Fe1/2Mn1/2]O-2. Scanning electron microscopy shows particle size in the micron range having hexagonal morphology with high aspect ratio. To circumvent the first cycle irreversible capacity loss in Na-2/3[Fe1/2Mn1/2]O-2, NaN3 has been used as a source of extra Na ions added to the cathode mix. While pristine P2 type Na-2/3[Fe1/2Mn1/2]O-2 exhibits an irreversible capacity of 59 mAh/g, it reduces to 27 mAh/g after adding 5 wt.% NaN3 with concomitant nitrogen evolution in the half cell configuration. With further optimization, the combination of Na-2/3[Fe1/2Mn1/2]O-2 with NaN3 is promising for a viable sodium-ion cell. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：61 / 63

页数：3

共 14 条

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