Electrochemical performance of the carbon coated Li3V2(PO4)(3) cathode material synthesized by a sol-gel method

IMR OpenIR

	Electrochemical performance of the carbon coated Li3V2(PO4)(3) cathode material synthesized by a sol-gel method
	Q. Q. Chen; J. M. Wang; Z. Tang; W. C. He; H. B. Shao; J. Q. Zhang
	2007
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	52 期号:16 页码:5251-5257
摘要	A carbon coated Li3V2(PO4)(3) cathode material for lithium ion batteries was synthesized by a sol-gel method using V2O5, H2O2, NH4H2PO4, LiOH and citric acid as starting materials, and its physicochemical properties were investigated using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) spectroscopy, scanning electron microscopy (SEM), energy dispersive analysis of X-ray (EDAX), transmission electron microscope (TEM), and electrochemical methods. The sample prepared displays a monoclinic structure with a space group of P2(1)/n, and its surface is covered with a rough and porous carbon layer. In the voltage range of 3.0-4.3 V, the Li3V2(PO4)(3) electrode displays a large reversible capacity, good rate capability and excellent cyclic stability at both 25 and 55 degrees C. The largest reversible capacity of 130 mAh g(-1) was obtained at 0.1C and 55 degrees C, nearly equivalent to the reversible cycling of two lithium ions per Li3V2(PO4)(3) formula unit (133 mAh g(-1)). It was found that the increase in total carbon content can improve the discharge performance of the Li3V2-(PO4)(3) electrode. In the voltage range of 3.0-4.8 V, the extraction and reinsertion of the third lithium ion in the carbon coated Li3V2(PO4)(3) host are almost reversible, exhibiting a reversible capacity of 177 mAh g(-1) and good cyclic performance. The reasons for the excellent electrochemical performance of the carbon coated Li3V2(PO4)(3) cathode material were also discussed. (c) 2007 Elsevier Ltd. All rights reserved.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese acad sci, state key lab corros & protect, shenyang 110015, peoples r china.;wang, jm (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;wjm@zju.edu.cn
关键词	Li3v2(Po4)(3) Sol-gel Method Carbon Surface Layer Electrochemical Performance Lithium-ion Batteries Carbothermal Reduction Method State Synthesis Routine Vanadium Fluorophosphate Electrode Materials Phosphates Lifepo4 Li3fe2(Po4)(3) Composites Insertion
URL	查看原文
WOS记录号	WOS:000246292100015
引用统计	被引频次：123[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33454
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. Q. Chen,J. M. Wang,Z. Tang,et al. Electrochemical performance of the carbon coated Li3V2(PO4)(3) cathode material synthesized by a sol-gel method[J]. Electrochimica Acta,2007,52(16):5251-5257.
APA	Q. Q. Chen,J. M. Wang,Z. Tang,W. C. He,H. B. Shao,&J. Q. Zhang.(2007).Electrochemical performance of the carbon coated Li3V2(PO4)(3) cathode material synthesized by a sol-gel method.Electrochimica Acta,52(16),5251-5257.
MLA	Q. Q. Chen,et al."Electrochemical performance of the carbon coated Li3V2(PO4)(3) cathode material synthesized by a sol-gel method".Electrochimica Acta 52.16(2007):5251-5257.