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作者:

Deng, Jianqiu (Deng, Jianqiu.) | Lu, Zhouguang (Lu, Zhouguang.) | Chung, C. Y. (Chung, C. Y..) | Han, Xiaodong (Han, Xiaodong.) (学者:韩晓东) | Wang, Zhongmin (Wang, Zhongmin.) | Zhou, Huaiying (Zhou, Huaiying.)

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EI Scopus SCIE

摘要:

Li4Ti5O12 thin film electrodes are successfully deposited on Pt/Ti/SiO2/Si substrates by pulsed laser deposition (PLD) technique. The microstructure and morphology of Li4Ti5O12 thin films are characterized by XRD and ESEM. The electrochemical properties of Li4Ti5O12 thin film electrodes are evaluated by galvanostatic cycling test. The kinetic behavior of lithium ions in Li4Ti5O12 thin film electrodes is also conducted using cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT), and electrochemical impedance spectroscopy (EIS). Li4Ti5O12 thin film electrodes show favorable specific capacities and cycle performance. The chemical diffusion coefficients are found to be in a range of 10(-15) to 10(-12) cm(2) s(-1) determined by GITT method. The kinetic parameters obtained from impedance spectra as a function of the cell voltage are investigated in details. The decrease of the charge-transfer resistance (R-ct) can be explained by the two-phase transition during lithium insertion into Li4Ti5O12. (C) 2014 Elsevier B.V. All rights reserved.

关键词:

Anode materials Diffusion kinetics Electrochemical performance Lithium ion batteries Thin film

作者机构:

  • [ 1 ] [Deng, Jianqiu]Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Peoples R China
  • [ 2 ] [Wang, Zhongmin]Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Peoples R China
  • [ 3 ] [Zhou, Huaiying]Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Peoples R China
  • [ 4 ] [Lu, Zhouguang]City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
  • [ 5 ] [Chung, C. Y.]City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
  • [ 6 ] [Han, Xiaodong]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100022, Peoples R China

通讯作者信息:

  • [Deng, Jianqiu]Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Peoples R China

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来源 :

APPLIED SURFACE SCIENCE

ISSN: 0169-4332

年份: 2014

卷: 314

页码: 936-941

6 . 7 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:256

JCR分区:1

中科院分区:2

被引次数:

WoS核心集被引频次: 23

SCOPUS被引频次: 24

ESI高被引论文在榜: 0 展开所有

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