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    • Significant improvement of electrochemical performance of Cu-coated LiVPO4F cathode material for lithium-ion batteries

      Yu Zhang Xiaolan Bai Cuiling Li

      Regular Articles Volume 127 Issue 8 August 2015 pp 1411-1416

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/127/08/1411-1416

    • Keywords

       

      Lithium-ion batteries; cathode material; LiVPO4F; surface modification.

    • Abstract

       

      In this paper, we reveal that the intrinsic low electronic conductivity of the pristine LiVPO4F is overcome with conductive Cu-coating. The existence of nano-Cu is confirmed with X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The morphology and particle size are observed by scanning electron microscopy (SEM). Galvanostatic charge/discharge test indicates that Cu coating is effective to improve the discharge capacity, cycle performance and rate capability. Analysis of electrochemical impedance spectra (EIS) shows that the addition of nano-Cu markedly decreases the charge transfer resistance of the pristine LiVPO4F electrode.

    • Author Affiliations

       

      Yu Zhang1 Xiaolan Bai2 Cuiling Li1

      1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
      2. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China

    • Dates

       
      Published
      August 2015
      Manuscript received
      17 January 2015
      Manuscript revised
      15 April 2015
      Accepted
      14 May 2015

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