Gel polymer electrolytes for lithium-sulfur batteries. (2018)

• Record Type: Journal Article
• Authors: Aishova, A.; Mentbayeva, A.; Isakhov, B.; Batyrbekuly, D.; Zhang, Y.; Bakenov, Z.
• Is Part Of: Materials today. Volume 5:Number 11(2018)Part 1
• Page Start: 22882
• Page End: 22888
• Publication Date: 2018
• Subjects: Llithium-sulfur polymer battery -- gel-polymer electrolytes -- PNIPAM, clay mineral; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2018.07.104
• Languages: English
• ISSNs: 2214-7853

Abstract

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