Na2/3Ni1/3Ti2/3O2: "Bi-Functional" Electrode Materials for Na-Ion Batteries

被引：53

作者：

Shanmugam, Rengarajan ^{[1
]}

Lai, Wei ^{[1
]}

机构：

[1] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA

来源：

ECS ELECTROCHEMISTRY LETTERS | 2014年 / 3卷 / 04期

关键词：

SODIUM-ION; ENERGY-STORAGE; OXIDES; DIFFRACTION; STABILITY;

D O I：

10.1149/2.007404eel

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this paper, we demonstrate the electrochemical properties of a P2-type layered oxide, Na-x(Ni2+)(1/3)(Ti4+)(2/3)O-2 (x = 2/3), as "bi-functional" electrode material for room temperature, non-aqueous Na-ion batteries. Making use of the high-voltage redox couple Ni2+/Ni3+ or the low-voltage redox couple Ti4+/Ti3+, we substantiate Na2/3Ni1/3Ti2/3O2 can function either as a cathode with an average voltage of 3.7 V and 75 mAh/g at C/20 or a anode with an average voltage of 0.7 V and 75 tnAh/g at C/20. The cathodic Na2/3Ni1/3Ti2/3O2 displays reversible sodium insertion/extraction but has a lower rate capability compared with anodic Na2/3Ni1/3Ti2/3O2. (C) 2014 The Electrochemical Society. All rights reserved.

引用

页码：A23 / A25

页数：3

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