Surface phase composition of nanosized LiFePO4 and their enhanced   electrochemical properties

doi:10.1039/c3ta10390k

CORC > 北京大学 > 工学院

	Surface phase composition of nanosized LiFePO4 and their enhanced electrochemical properties
	Shang, Huaifang ; Chu, Wangsheng ; Cheng, Jie ; Pan, Fangfang ; Cheng, Dongming ; Xia, Dingguo ; Wang, Wenlou ; Wu, Ziyu
刊名	journal of materials chemistry a
	2013
关键词	LITHIUM-ION BATTERIES ABSORPTION FINE-STRUCTURE ALPHA-FE2O3 SUPERSTRUCTURES ELECTRODE MATERIALS CATHODE MATERIALS HIGH-POWER PERFORMANCE NANOCOMPOSITE SPECTROSCOPY GLASSES
DOI	10.1039/c3ta10390k
英文摘要	Despite the great achievement in understanding the materials properties of LiFePO4, the surface phase composition of nanosized LiFePO4 has been almost ignored. The present study reports the synthesis of nanosized core-shell LiFePO4 with size of about 50 nm by one step solvothermal route using Polyethylene glycol 600 as solvent. The structural characterization of the surface of nanosized core-shell LiFePO4 particles has been investigated using soft X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and transmission electron microscopy. The nanosized LiFePO4 is well-covered by an amorphous LiFeP2O7 layer containing trace carbon. Density functional theory (DFT) calculation is used to illustrate the origin of amorphous LiFeP2O7 layer. The nanosized core-shell LiFePO4 exhibits excellent charge transfer kinetics and charge/discharge performance. These new investigations shed new insight into the surface phase composition of nano-particles. The synthesis of the nanosized core-shell LiFePO4 paves an effective way to develop cathode materials with high rate capabilities for use in Li-ion batteries.; Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary; SCI(E); EI; 2; ARTICLE; 22; 6635-6641; 1
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/228198]
专题	工学院
推荐引用方式 GB/T 7714	Shang, Huaifang,Chu, Wangsheng,Cheng, Jie,et al. Surface phase composition of nanosized LiFePO4 and their enhanced electrochemical properties[J]. journal of materials chemistry a,2013.
APA	Shang, Huaifang.,Chu, Wangsheng.,Cheng, Jie.,Pan, Fangfang.,Cheng, Dongming.,...&Wu, Ziyu.(2013).Surface phase composition of nanosized LiFePO4 and their enhanced electrochemical properties.journal of materials chemistry a.
MLA	Shang, Huaifang,et al."Surface phase composition of nanosized LiFePO4 and their enhanced electrochemical properties".journal of materials chemistry a (2013).