New active titanium oxyphosphate material for lithium batteries

被引：42

作者：

Belharouak, I ^{[1
]}

Amine, K ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2005年 / 7卷 / 07期

关键词：

lithium batteries; Ni0.5TiOPO4; oxyphosphate;

D O I：

10.1016/j.elecom.2005.04.014

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Ni0.5TiOPO4 oxyphosphate has been identified in the (NiO-TiO2-P2O5) ternary diagram as a new insertion compound for lithium batteries. The 3-dimensional structure of this material consists of corner sharing octahedra [TiO6], isolated [PO4] tetrahedra, and [NiO6] octahedra located between the titanium chains. The material also contains octahedral vacant sites that constitute favorable sites for lithium insertion. The Ni0.5TiOPO4 electrode intercalates three lithium atoms during the first discharge with an equivalent specific capacity of 415 mAh/g. The cell based on this new cathode material operates at 1.8 V vs. metallic lithium and exhibits low area specific impedance values. The large observed capacity and the fairly good cycling characteristics of the cell based on this new cathode material make this system an excellent system for applications that require low voltage and high energy density. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：648 / 651

页数：4

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