Electrochemical performance of the carbon coated Li3V2(PO4)(3) cathode material synthesized by a sol-gel method
文献类型：期刊论文
| 作者 | Q. Q. Chen ; J. M. Wang ; Z. Tang ; W. C. He ; H. B. Shao ; J. Q. Zhang |
| 刊名 | Electrochimica Acta
 |
| 出版日期 | 2007 |
| 卷号 | 52期号:16页码:5251-5257 |
| 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 |
| ISSN号 | 0013-4686 |
| 中文摘要 | 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. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/33454]  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。