A carbon-coated Li3V2(PO4)3 cathode material with an enhanced high-rate capability and long lifespan for lithium-ion batteries

被引：104
作者：
Su, Jing [1 ]
Wu, Xing-Long [1 ]
Lee, Jong-Sook [2 ]
Kim, Jaekook [2 ]
Guo, Yu-Guo [1 ,2 ]
机构：
[1] Chinese Acad Sci, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
[2] Chonnam Natl Univ WCU, Sch Mat Sci & Engn, Kwangju 500757, South Korea
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 07期
基金：
中国国家自然科学基金;
关键词：
ELECTROCHEMICAL PERFORMANCE; PHYTIC ACID; HYDROTHERMAL SYNTHESIS; VANADIUM PHOSPHATE; COMPOSITES; ELECTRODES;
D O I：
10.1039/c2ta01254e
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：
A facile sol-gel approach combined with a carbon-coating technique via high-temperature thermally decomposing C2H2 has been developed for the synthesis of a Li3V2(PO4)(3)/C (LVP/C) cathode material employing the biomass of phytic acid as an eco-friendly phosphorus source. The effects of the carbon-coating on the structural, morphological and electrochemical properties of LVP have been investigated. Compared with pristine LVP, the LVP/C composite presents a higher discharge capacity of 127 mA h g(-1) at 0.1 C, better rate capability and long-term cyclability in the voltage range of 3.0-4.3 V. Even at a high charge-discharge rate of 5 C, it can still deliver a reversible capacity of 107 mA h g(-1) over 400 cycles without obvious fading, demonstrating great potential as a superior cathode material for lithium-ion batteries.
引用
收藏
页码：2508 / 2514
页数：7
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