Facile fabrication of flexible all solid-state micro-supercapacitor by direct laser writing of porous carbon in polyimide

被引:207
|
作者
Bin In, Jung [1 ,2 ]
Hsia, Ben [3 ]
Yoo, Jae-Hyuck [1 ]
Hyun, Seungmin [2 ]
Carraro, Carlo [3 ]
Maboudian, Roya [3 ]
Grigoropoulos, Costas P. [1 ]
机构
[1] Univ Calif Berkeley, Dept Mech Engn, Laser Thermal Lab, Berkeley, CA 94720 USA
[2] Korea Inst Machinery & Mat, Dept Nanomech, Taejon 305343, South Korea
[3] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA
基金
美国国家科学基金会;
关键词
ELECTROCHEMICAL CAPACITORS; ENERGY-STORAGE; ELECTRICAL-CONDUCTIVITY; HIGH-PERFORMANCE; ABLATION; GRAPHENE; FILMS; ELECTRONICS; RADIATION; POLYMERS;
D O I
10.1016/j.carbon.2014.11.017
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:144 / 151
页数:8
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