Gelatin-assisted synthesis of LiNi0.5Mn1.5O 4 cathode material for 5V lithium rechargeable batteries

Mingyue Mo, Chengcong Ye, Ke Lai, Zhenze Huang, Licai Zhu, Guozheng Ma, Hongyu Chen, K. S. Hui

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16 Citations (Scopus)

Abstract

In this work, gelatin is for the first time utilized to conduct polymer-assisted synthesis of LiNi0.5Mn1.5O4 as the cathode material for 5 V lithium rechargeable batteries. The effect of different amounts of gelatin on structural and morphological properties, electrochemical characterization of the obtained products are investigated by XRD, SEM, charge/discharge testing, cyclic voltammograms (CV) and electrochemical impedance spectroscopy (EIS), respectively. It's found that with the addition of moderate amount of gelatin, the sample displays a higher degree of crystallinity and phase purity, more uniform shape and monodispersed nanometric size. As a result, electrochemical cycling stability and rate performance are significantly enhanced. CV and EIS measurements further demonstrate that using an optimal amount of gelatin can improve electrochemical performance due to the reversible reaction, faster insertion/extraction of Li ions in the spinel structure and decreased interface independence.

Original languageEnglish
Pages (from-to)635-640
Number of pages6
JournalApplied Surface Science
Volume276
Early online date23 Mar 2013
DOIs
Publication statusPublished - 1 Jul 2013

Keywords

  • Electrochemical impedance spectroscopy
  • Electrode materials
  • Gelatin
  • LiNiMnO
  • Scanning electron microscopy

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