Effects of Sn doping on the structural and electrochemical properties of LiNi0.8Co0.2O2 cathode materials

被引：24

作者：

Ma, Xiaoling ^{[1
]}

Wang, Chiwei ^{[1
]}

Cheng, Jinguo ^{[1
]}

Sun, Jutang ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

SOLID STATE IONICS | 2007年 / 178卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

lithium-ion batteries; Sn doping; rheological phase reaction method; cathode materials; defects;

D O I：

10.1016/j.ssi.2006.11.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

LiNi0.8Co0.2O2 and Sn-doped LiNi0.8Co0.2O2 cathode materials are synthesized via a rheological phase reaction method. They are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), particle size analysis and electrochemical tests. The effects of Sn doping on the structural and electrochemical properties are investigated. The Sn4+ ion occupies the Ni3+ (or CO3+) ion site to form Sn-Ni(or Sn-Co) defects, at the same time, part of the Ni ions are reduced to form Ni-Ni defects to make electric charge compensation in the crystal lattice, which is beneficial for stabilizing the structure, reducing the resistance and increasing conductivity of LiNi0.8Co0.2O2. (c) 2006 Elsevier B.V All rights reserved.

引用

页码：125 / 129

页数：5

共 20 条

[1] Synthesis by a soft chemistry route and characterization of LiNixCo1-xO2 (0<=x<=1) cathode materials [J].