Gel polymer electrolytes for lithium-sulfur batteries

A. Aishova, A. Mentbayeva, B. Isakhov, D. Batyrbekuly, Y. Zhang, Z. Bakenov

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Gel polymer electrolytes (GPE) consisting of a solution of lithium (trifluoromethane)sulfonimide (LiTFSI) dispersed in poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/poly(methyl methacrylate) (PMMA)/poly(N-isopropylacrylamide) (PNIPAM) matrix were prepared. Effect of montmorillonite clay mineral additives to stability and electrochemical performance was studied. GPEs exhibited up to 800 wt% electrolyte uptake, high electrochemical and thermal dimensional stability compared to Celgard separator. Li/S cells assembled with S/C composite cathode and PVDF-HFP/PMMA/PNIPAM GPE delivered initial discharge capacities of 1,300 and 850 mAh g-1 in the first and 15th cycles at 0.1 C, respectively, along with high coulombic efficiency (about 100 %) over 100 cycles. The coulombic efficiency was attributed to the suppression of shuttle effect by the gel polymer electrolyte leading to the higher sulfur utilization in the cell.

Original languageEnglish
Pages (from-to)22882-22888
Number of pages7
JournalMaterials Today: Proceedings
Volume5
Issue number11
DOIs
Publication statusPublished - Jan 1 2018
Event5th International Conference on Nanomaterials and Advanced Energy Storage Systems, INESS 2017 - Astana, Kazakhstan
Duration: Aug 9 2017Aug 11 2017

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Keywords

  • gel-polymer electrolytes
  • Llithium-sulfur polymer battery
  • PNIPAM, clay mineral

ASJC Scopus subject areas

  • Materials Science(all)

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