Electrochemical Properties of Monoclinic NaMnO2

被引：552

作者：

Ma, Xiaohua ^{[1
]}

Chen, Hailong ^{[1
]}

Ceder, Gerbrand ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2011年 / 158卷 / 12期

基金：

美国国家科学基金会;

关键词：

X LESS-THAN; STRUCTURAL-CHARACTERIZATION; ELECTRONIC-STRUCTURE; PHASE-STABILITY; LAYERED LIMNO2; DEINTERCALATION; TRANSITION; SODIUM; LI; INTERCALATION;

D O I：

10.1149/2.035112jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Monoclinic alpha- NaMnO2 is re-investigated electrochemically as a positive electrode material for sodium ion batteries. About 0.85 Na can be deintercalated from NaMnO2 and 0.8 Na be intercalated back during potentiostatical intermittent charge and discharge. Galvanostatical cycling between 2.0 V and 3.8 V gives 185 mAh/g discharge capacity for the first cycle at C/10 rate and 132 mAh/g remains after 20 cycles. Charge and discharge curves are significantly different indicating more hysteresis than is typical for lithium intercalation compounds. We also explain the remarkable difference between layered LiMnO2 and NaMnO2 upon alkali removal. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.035112jes] All rights reserved.

引用

页码：A1307 / A1312

页数：6

共 41 条

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