期刊
CARBON
卷 83, 期 -, 页码 144-151出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.11.017
关键词
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资金
- NSF SINAM NSEC
- National Science Foundation [EEC-0832819]
- R&D Convergence Program of MSIP (Ministry of Science, ICT and Future Planning)
- ISTK (Korea Research Council for Industrial Science and Technology) of Republic of Korea [B551179-13-01-03]
- Korean Research Council for Industrial Science and Technology [SC1010]
- National Research Foundation of Korea [SC1010] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We demonstrate the fabrication of flexible micro-supercapacitors based on laser carbonization of polyimide sheets. Localized pulsed laser irradiation rapidly converts the pristine polyimide surface into an electrically conductive porous carbon structure in ambient conditions. Thus, the polyimide sheet acts as both a precursor for the carbonization and a flexible substrate. Effects of various laser parameters are examined to enhance electrical properties and morphology of the carbonized structures. The interdigitated electrode patterns are produced directly on the polyimide sheets by programmed laser scanning. A solid-state polyvinyl alcohol-phosphoric acid gel electrolyte is introduced into the active electrode area to realize a flexible all solid-state microcapacitor assembly. Cyclic voltammetry measurements exhibit the expected electrical double layer behavior. The specific capacitance of the supercapacitors reaches similar to 800 mu F/cm(2) at a voltage scan rate of 10 mV/s with good capacitance retention under mechanical bending. The proposed laser-based approach enables facile fabrication of flexible micro-supercapacitors without tedious photolithographic patterning of porous carbon and metal current collectors. (C) 2014 Elsevier Ltd. All rights reserved.
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