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All-solid-state interpenetrating network polymer electrolytes for long cycle life of lithium metal batteries

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Abstract

A star-shape polymer of 3-armed poly(ethylene glycol) methyl ether methacrylate-co-glycidyl methacrylate copolymer (3PPEGM-co-GMA) was synthesized using an atom transfer radical polymerization (ATRP) technique. All-solid-state interpenetrating network polymer electrolytes (INSPEs) were fabricated by simultaneous reaction of 3PPEGM-co-GMA and bisphenol A diglycidyl ether (BPDE) with polyetherdiamine (ED2003) in the presence of lithium bis(trifluoromethane) sulfonamide (LiTFSI). The INSPEs exhibited ionic conductivities higher than 10−5 S cm−1 at room temperature, a high oxidation stability of 4.5 vs. Li/Li+ and remarkable stability towards lithium metal. Li metal batteries with LiFePO4 as the cathode and INSPEs as the electrolyte cycled at a current rate of 0.1C at 60 °C showed a high initial discharge capacity of 156.2 mA h g−1 and a stable cycling performance over 200 cycles with a high coulombic efficiency of 99%. The results demonstrate that the interpenetrating network polymer electrolytes are promising electrolytes for next generation lithium-based batteries with high ionic conductivity, improved safety, and stable electrochemical performance.

Graphical abstract: All-solid-state interpenetrating network polymer electrolytes for long cycle life of lithium metal batteries

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Publication details

The article was received on 03 Apr 2018, accepted on 02 Jul 2018 and first published on 03 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA03062F
Citation: J. Mater. Chem. A, 2018, Advance Article
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    All-solid-state interpenetrating network polymer electrolytes for long cycle life of lithium metal batteries

    Y. Tong, H. Lyu, Y. Xu, B. Prasad Thapaliya, P. Li, X. Sun and S. Dai, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA03062F

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