Synthesis of carbon-coated LaFeO3 and electrochemical properties of the composites in alkaline solution

doi:10.3724/SP.J.1077.2012.12171

	Synthesis of carbon-coated LaFeO3 and electrochemical properties of the composites in alkaline solution
	Qi, Wen-Juan 1; Luo, Yong-Chun 1,2; Kang, Long 1; Zhang, Guo-Qing 1
刊名	Wuji Cailiao Xuebao/Journal of Inorganic Materials
	2012-12-01
卷号	27 期号:12 页码:1243-1250
关键词	Amorphous carbon Coatings Crystal structure Electric discharges Electrochemical properties Glass ceramics Iron compounds Nanostructures Perovskite Sol-gel process Sol-gels Carbon coating Carbon-coated composites Discharge capacities Electrochemical measurements ELectrochemical methods Electrochemical performance Exchange current densities Raman spectroscope
ISSN号	1000324X
DOI	10.3724/SP.J.1077.2012.12171
英文摘要	LaFeO3 nanostructure powders oxide was synthesized by sol-gel method and then LaFeO3/C composite materials containing different amounts of carbon were prepared by heat treatment using sucrose as a carbon source. The crystal structure, surface morphologies and electrochemical properties of the obtained composites coated with various carbon contents were investigated by the techniques of XRD, SEM, TEM, Raman spectroscope and electrochemical method. It was found that single phase nanostructure with perovskite-type LaFeO3 was obtained by Sol-Gel method and the crystal structure of LaFeO3/C could not be changed after coating carbon. Under high temperature, sourose was decomposed into amorphous carbon, which coated on the surface of LaFeO3 particles and formed network-like structure between LaFeO3 particles. Electrochemical measurements showed that the carboncoated composites were superior in the electrochemical performance to the LaFeO3. LaFeO3/C electrodes possessed high discharge capacities, among which the sample adding with 5wt% carbon had the largest discharge capacity of 390 mAh/g. With increasing amount of carbon coated, the exchange current density I0 significantly enhanced, while effect of the coated carbon on the diffusion coefficient of ions was not obvious.
WOS研究方向	Materials Science
语种	中文
出版者	Science Press
WOS记录号	WOS:000313396600002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/111099]
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
作者单位	1.College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2.State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Qi, Wen-Juan,Luo, Yong-Chun,Kang, Long,et al. Synthesis of carbon-coated LaFeO3 and electrochemical properties of the composites in alkaline solution[J]. Wuji Cailiao Xuebao/Journal of Inorganic Materials,2012,27(12):1243-1250.
APA	Qi, Wen-Juan,Luo, Yong-Chun,Kang, Long,&Zhang, Guo-Qing.(2012).Synthesis of carbon-coated LaFeO3 and electrochemical properties of the composites in alkaline solution.Wuji Cailiao Xuebao/Journal of Inorganic Materials,27(12),1243-1250.
MLA	Qi, Wen-Juan,et al."Synthesis of carbon-coated LaFeO3 and electrochemical properties of the composites in alkaline solution".Wuji Cailiao Xuebao/Journal of Inorganic Materials 27.12(2012):1243-1250.