Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 21, Pages 7997-8002Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00570h
Keywords
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Funding
- China Scholarship Council [201206170078]
- National Science Foundation
- National Science Foundation through Center of Integrated Nanomechanical Systems [EEC-0832819]
- Siemens CKI
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We report on the fabrication of an all solid-state micro-supercapacitor using patterned photoresist-derived porous carbon electrodes and an ionogel electrolyte. The interdigitated finger electrodes are synthesized via pyrolysis of the SPR-220 photoresist, which results in high surface area porous carbon via a highly scalable technique. The ionogel electrolyte is formed using 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ionic liquid hybridized with fumed silica nanopowder. The fabricated device has an excellent long-term cycling stability. The maximum energy density obtained is about 3 mW h cm(-3), higher than that of commercial Li-ion thin film batteries, with the maximum achieved power density of 26 W cm(-3). Our results indicate that the novel combination of the pyrolyzed photoresist with an ionogel electrolyte holds promise for applications in integrated energy storage for all solid-state microsystems technologies.
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