Fabrication of promising LiFePO4/C composite with a core-shell structure by a moderate in situ carbothermal reduction method

doi:10.1016/j.electacta.2012.02.102

	Fabrication of promising LiFePO4/C composite with a core-shell structure by a moderate in situ carbothermal reduction method
	Kong, Ling-Bin 1,2; Zhang, Peng 1; Liu, Mao-Cheng 1; Liu, Hong 1; Luo, Yong-Chun 2; Kang, Long 2
刊名	ELECTROCHIMICA ACTA
	2012-05-30
卷号	70 页码:19-24
关键词	LiFePO4/C composite Lithium ion batteries Carbothermal reduction Core-shell structure
ISSN号	0013-4686
DOI	10.1016/j.electacta.2012.02.102
英文摘要	How to improve the power density of olivine LiFePO4 has recently become one of the most attractive topics of both scientific and industrial interests. Therefore, nanostructured electrodes have been widely investigated to satisfy such needs. However, the complicated and high-temperature sintering process is usually involved for preparing high-performance cathode materials based on high-quality crystals. In order to solve these problems, here, a promising LiFePO4/C composite electrode material is synthesized by an in situ carbothermal reduction method at low temperature using a low-cost Fe3+ salt as the iron source, soluble starch sol as carbon sources and reducing agent. The synthesized LiFePO4/C composite shows highly crystalline, ultrafine sphere-like particles and a desirable core-shell structure with uniform carbon film on the surface of nano-crystal LiFePO4, which could inherit the morphology of FePO4 precursor. Galvanostatic battery testing shows that LiFePO4/C composite delivers 161 and 122 mAh/g at 0.2 C and 5 C rates, respectively, and exhibits desirable capacity retention after 500 cycles at 5 C. Remarkably, even at a high current density of 20 C, the cell still presents good cycle retention. (C) 2012 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[21163010] ; Lanzhou University of Technology[J201102]
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000304497000003
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34906]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Kong, Ling-Bin
作者单位	1.Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Kong, Ling-Bin,Zhang, Peng,Liu, Mao-Cheng,et al. Fabrication of promising LiFePO4/C composite with a core-shell structure by a moderate in situ carbothermal reduction method[J]. ELECTROCHIMICA ACTA,2012,70:19-24.
APA	Kong, Ling-Bin,Zhang, Peng,Liu, Mao-Cheng,Liu, Hong,Luo, Yong-Chun,&Kang, Long.(2012).Fabrication of promising LiFePO4/C composite with a core-shell structure by a moderate in situ carbothermal reduction method.ELECTROCHIMICA ACTA,70,19-24.
MLA	Kong, Ling-Bin,et al."Fabrication of promising LiFePO4/C composite with a core-shell structure by a moderate in situ carbothermal reduction method".ELECTROCHIMICA ACTA 70(2012):19-24.