Polyethylene oxide/garnet-type Li6.4La3Zr1.4Nb0.6O12 composite electrolytes with improved electrochemical performance for solid state lithium rechargeable batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

12 Scopus Citations
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Author(s)

  • Chenglin Chen
  • Rong Fan
  • Chen Liu
  • Chengzhu Liao
  • Jiaoning Tang

Detail(s)

Original languageEnglish
Pages (from-to)28-34
Journal / PublicationComposites Science and Technology
Volume175
Online published28 Feb 2019
Publication statusPublished - 3 May 2019

Abstract

Next generation lithium batteries require new electrolytes with good safety, excellent ionic conductivity, high electrochemical stability and good cycling performance. Herein, we first report a solid composite polymer electrolyte comprises of Li6.4La3Zr1.4Nb0.6O12 fillers and polyethylene oxide matrix. The ionic conductivity of the solid composite electrolyte is significantly improved to 1.4 × 10−3 S cm−1 (60 °C) and the electrochemical window is enhanced to 5.2 V, respectively, by incorporation of Li6.4La3Zr1.4Nb0.6O12 powder at a weight ratio of 0.5:1 with respect to polyethylene oxide. The solid batteries employing the composite electrolytes are able to work at room temperature and have a capacity retention of 99% after cycle. The performance improvement is primarily due to the combined functions of each component in the composite: (i) the incorporation of fillers effectively decreases the crystallinity of PEO, providing more amorphous region for ion conduction; (ii) Li6.4La3Zr1.4Nb0.6O12 serves as a fast ion conductor in the composite and enhance the electrochemical stability; (iii) the polymer matrix forms intimate surface contact with fillers and electrodes, reducing the bulk and interfacial resistance. The composite polymer electrolyte in this work would be a competitive alternative for the next generation solid state lithium rechargeable batteries.

Citation Format(s)

Polyethylene oxide/garnet-type Li6.4La3Zr1.4Nb0.6O12 composite electrolytes with improved electrochemical performance for solid state lithium rechargeable batteries. / He, Kangqiang; Chen, Chenglin; Fan, Rong; Liu, Chen; Liao, Chengzhu; Xu, Yi; Tang, Jiaoning; Li, Robert K.Y.

In: Composites Science and Technology, Vol. 175, 03.05.2019, p. 28-34.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal