Lee, Jin Hong Lee, Albert S. Lee, Jong-Chan Hong, Soon Man Hwang, Seung Sang Koo, Chong Min 2024-01-20T08:00:36Z 2024-01-20T08:00:36Z 2021-09-04 2015-02 2050-7488 https://pubs.kist.re.kr/handle/201004/125827 Hybrid ionogels fabricated using 1 M LiTFSI in N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide (BMPTFSI) crosslinked with ladder-like structured poly(methacryloxypropyl) silsesquioxane (LPMASQ) were investigated as high temperature ionogel electrolytes for lithium ion batteries. In addition to the exceedingly low crosslinker concentration (similar to 2 wt%) required to completely solidify the ionic liquids, which provided high ionic conductivities comparable to the liquid state ionic liquid, these hybrid ionogels exhibited superior thermal stabilities (>400 degrees C). Rigorous lithium ion battery cells fabricated using these hybrid ionogels revealed excellent cell performance at various C-rates at a variety of temperatures, comparable with those of neat liquid electrolytes. Moreover, these hybrid ionogels exhibited excellent cycling performance during 50 cycles at 90 degrees C, sustaining over 98% coulombic efficiency. Highly advantageous properties of these hybrid ionogels, such as high ionic conductivity in the gel state, thermal stability, excellent C-rate performance, cyclability and non-flammability, offer opportunities for applications as high temperature electrolytes. English ROYAL SOC CHEMISTRY COMPOSITE POLYMER ELECTROLYTES IONIC LIQUIDS MECHANICALLY COMPLIANT SOL-GEL POLYSILSESQUIOXANE CHALLENGES POLYPHENYLSILSESQUIOXANE NETWORKS Hybrid ionogel electrolytes for high temperature lithium batteries Article 10.1039/c4ta06062h 1 JOURNAL OF MATERIALS CHEMISTRY A, v.3, no.5, pp.2226 - 2233 JOURNAL OF MATERIALS CHEMISTRY A 3 5 2226 2233 scie scopus 000348146600059 2-s2.0-84921665763 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article COMPOSITE POLYMER ELECTROLYTES IONIC LIQUIDS MECHANICALLY COMPLIANT SOL-GEL POLYSILSESQUIOXANE CHALLENGES POLYPHENYLSILSESQUIOXANE NETWORKS ionogel polysilsesquioxane battery electrolyte