Kinetic analysis on LiFePO4 thin films by CV, GITT, and EIS

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	Kinetic analysis on LiFePO4 thin films by CV, GITT, and EIS
	Tang, K ; Yu, XQ ; Sun, JP ; Li, H ; Huang, XJ
刊名	ELECTROCHIMICA ACTA
	2011
卷号	56 期号:13 页码:4869
关键词	CHEMICAL DIFFUSION-COEFFICIENT PULSED-LASER DEPOSITION LITHIUM-ION BATTERIES PHASE-TRANSITIONS INSERTION ELECTRODES CATHODE MATERIAL SOLID-SOLUTION INTERCALATION TRANSPORT MODEL
ISSN号	0013-4686
通讯作者	Huang, XJ: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	LiFePO4 thin films were deposited on Ti substrates by pulsed laser deposition (PLD). The apparent chemical diffusion coefficients of lithium in the films, D-Li, were measured by cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT), and electrochemical impedance spectroscopy (EIS). The average D-Li values calculated from CV results were in the order of 10(-14) cm(2) s(-1). The D-Li values obtained by GITT, and EIS techniques were in the range of 10(-14)-10(-18) cm(2) s(-1), 10(-14)-10(-18) cm(2) s(-1), respectively.The D-Li values obtained by the two methods show a minimum point at x similar to 0.5 for Li1-xFePO4. However, the overpotential values of the LiFePO4 thin film electrodes obtained from the GITT results and the diffusion impedance deduced from the impedance spectra also show the minimum values at x similar to 0.5 for Li1-xFePO4. This contradict could be caused by the improper use of GITT and EIS techniques for measuring the chemical diffusion coefficient of Li in Li1-xFePO4 which constitutes two phase, i.e., LiFePO4 and FePO4 in this region. (C) 2011 Elsevier Ltd. All rights reserved.
收录类别	SCI
资助信息	CAS [KJCX2- YW-W26]; NSFC [50730005]; "863" project [2009AA033101]
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40455]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Tang, K,Yu, XQ,Sun, JP,et al. Kinetic analysis on LiFePO4 thin films by CV, GITT, and EIS[J]. ELECTROCHIMICA ACTA,2011,56(13):4869.
APA	Tang, K,Yu, XQ,Sun, JP,Li, H,&Huang, XJ.(2011).Kinetic analysis on LiFePO4 thin films by CV, GITT, and EIS.ELECTROCHIMICA ACTA,56(13),4869.
MLA	Tang, K,et al."Kinetic analysis on LiFePO4 thin films by CV, GITT, and EIS".ELECTROCHIMICA ACTA 56.13(2011):4869.