期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 32, 页码 16534-16539出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm33496h
关键词
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资金
- Tufts University Faculty Research Awards Committee
- National Science Foundation [ECS-0335765]
The development of an ionic liquid-rich (similar to 94% bymass), mechanically compliant, silica-supported ionogel (ionic liquid-based gel electrolyte) is described. This new form of ionogel was created using a straightforward sol-gel process with a novel formulation of reactants, resulting in a versatile, stable, and high-performance solid electrolyte. The mechanically compliant ionogels described herein show both capacitance and ionic conductivity values at room temperature nearly equivalent to those of the neat ionic liquid (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, EMI TFSI), in addition to exhibiting a wide window of electrochemical stability. Compliant ionogels (elastic modulus of similar to 5 kPa) show markedly different mechanical character than previously reported silica ionogels, which are mechanically brittle and exhibit lower ionic conductivity and double-layer capacitance. The silica microstructure is shown to be tunable by simple alterations of the reagent formulation. Compliant ionogels may be suitable for in situ fabrication of flexible, thin-film energy storage devices such as supercapacitors.
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