Adverse effect of Ag treatment on the electrochemical performance of the 5 V nanometric spinel LiNi0.5Mn1.5O4 in lithium cells

被引：27

作者：

Arrebola, J

Caballero, A

Hernán, L

Morales, J

Castellón, ER

机构：

[1] Univ Cordoba, Dept Quim Inorgan & Ingn Quim, Cordoba 14071, Spain

[2] Univ Malaga, Dept Quim Inorgan, E-29071 Malaga, Spain

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2005年 / 8卷 / 06期

关键词：

D O I：

10.1149/1.1911877

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effect of coating the nanometric spinel LiNi0.5Mn1.5O4 with Ag on its rate capability was studied. The X-ray photoelectron spectroscopy (XPS) concentration depth profiles obtained reveal that the intensity of the Ag 3d peak remains unchanged for a long sputtering time, so the spinel particles do not seem to be coated by an Ag layer. The effect is detrimental at high charge/discharge rates and the addition of silver significantly degrades the rate capability of the spinel. Ag oxide nanoclusters formed in the first charge process possibly establish a barrier that hinders transfer of the high ion flux between the electrolyte and electrode. (c) 2005 The Electrochemical Society.

引用

页码：A303 / A307

页数：5

共 24 条

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