期刊
SOLID STATE IONICS
卷 255, 期 -, 页码 84-88出版社
ELSEVIER
DOI: 10.1016/j.ssi.2013.12.007
关键词
Lithium cobalt phosphate; Cathode material; High voltage; Lithium-ion batteries; Yttrium doping
资金
- 973 Program [2009CB220100]
- 863 Program [2012AA111401]
- Natural Science Foundation of Jiangsu Province [BK2012293, BK20130482]
- University Natural Science Research Project of Jiangsu Province [13KJB430008]
- Research Foundation for Advanced Talents of Jiangsu University in China [1281120040]
Pure and Y-doped LiCoPO4 samples are prepared by a citric acid-based sol-gel route followed by heat treatment. X-ray diffraction, scanning electron microscopy and charge-discharge tests show that a small amount of Y3+ doping can significantly improve the capacity delivery and cycling properties of LiCoPO4 without affecting its structural properties. Y-doped LiCoPO4 (x = 0.01) cathode material presents a high discharge capacity of 154.3 mAh g(-1) (0.1 C) at room temperature. Cyclic voltammetric and electrochemical impedance spectra tests disclose that the Li-ion diffusion, the reversibility of lithium extraction/insertion, electrical conductivity and electrochemical reaction are significantly improved in Y-doped LiCoPO4. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据