Preparation of LiCoPO4 and LiFePO4 coated LiCoPO4 materials with improved battery performance

被引：65

作者：

Jang, I. C. ^{[1
]}

Lim, H. H. ^{[1
]}

Lee, S. B. ^{[1
]}

Karthikeyan, K. ^{[1
]}

Aravindan, V. ^{[1
]}

Kang, K. S. ^{[2
]}

Yoon, W. S. ^{[3
]}

Cho, W. I. ^{[4
]}

Lee, Y. S. ^{[1
]}

机构：

[1] Chonnam Natl Univ, Fac Appl Chem Engn, Kwangju 500757, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

[3] Kookmin Univ, Sch Adv Mat Engn, Seoul 136702, South Korea

[4] Korea Inst Sci & Technol, Div Energy & Environm, Seoul 136791, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 497卷 / 1-2期

关键词：

Lithium cobalt phosphate; Lithium ion phosphate; Surface coating; Sol-gel method; Solid-state reaction; LITHIUM-ION BATTERIES; ELECTROCHEMICAL PERFORMANCE; ELECTRODE MATERIALS; ENERGY-STORAGE; FE; NI; CO;

D O I：

10.1016/j.jallcom.2010.03.055

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：

Olivine LiCoPO4 material has been successfully synthesized by solid-state reaction method without any carbon coating. The X-ray diffraction pattern shows that LiCoPO4 has a well developed orthorhombic structure with Prima space group The SEM analysis shows the particulate nature of the prepared materials with <200 nm size. The TEM analysis confirms that a 2-3 nm thick LiFePO4 layer is coated onto LiCoPO4. The LiFePO4 coated LiCoPO4 cell delivers a high initial discharge capacity of 132 mAhg(-1), which is 19 mAhg(-1) higher than the parent LiCoPO4 Furthermore, the LiFePO4 coated LiCoPO4 cell exhibits an improved capacity retention compared to the original LiCoPO4 during cycling Crown Copyright (C) 2010 Published by Elsevier B V. All rights reserved

引用

页码：321 / 324

页数：4

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