Nitrogen doped carbon derived from polyimide/multiwall carbon nanotube composites for high performance flexible all-solid-state supercapacitors

Title
Nitrogen doped carbon derived from polyimide/multiwall carbon nanotube composites for high performance flexible all-solid-state supercapacitors
Authors
유남호김남동Dae Kyom KimSeung-Keun ParkKwang-dong SeongYuanzhe PiaoMinsik Hwang
Keywords
Amine functionalized multiwall carbon; Flexible supercapacitor; nanotube; Polyimide; Nitrogen doped carbon; Carbon textile
Issue Date
2018-03
Publisher
Journal of power sources
Citation
VOL 380-63
Abstract
Flexible all-solid-state supercapacitors are desirable as potential energy storage systems for wearable technologies. Herein, we synthesize aminophenyl multiwall carbon nanotube (AP-MWCNT) grafted polyimide precursor by in situ polymerization method as a nitrogen-doped carbon precursor. Flexible supercapacitor electrodes are fabricated via a coating of carbon precursor on carbon cloth surface and carbonization at high temperature directly. The as-obtained electrodes, which can be directly used without any binders or additives, can deliver a high specific capacitance of 333.4 F g− 1 at 1 A g− 1 (based on active material mass) and excellent cycle stability with 103% capacitance retention after 10,000 cycles in a three-electrode system. The flexible all-solid-state supercapacitor device exhibits a high volumetric capacitance of 3.88 F cm− 3 at a current density of 0.02 mA cm− 3. And also the device can deliver a maximum volumetric energy density of 0.50 mWh cm− 3 and presents good cycling stability with 85.3% capacitance retention after 10,000 cycles. This device cell can not only show extraordinary mechanical flexibilities allowing folding, twisting, and rolling but also demonstrate remarkable stable electrochemical performances under their forms. This work provides a novel approach to obtain carbon textile-based flexible supercapacitors with high electrochemical performance and mechanical flexibility.
URI
http://pubs.kist.re.kr/handle/201004/67304
ISSN
0378-7753
Appears in Collections:
KIST Publication > Article
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