期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 5, 页码 2226-2233出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta06062h
关键词
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资金
- Fundamental R&D Program for Core Technology of Materials
- Industrial Strategic Technology Development Program - Ministry of Knowledge Economy, Republic of Korea
- Centre for Materials Architecting of the Korea Institute of Science and Technology (KIST)
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.
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