期刊
GLOBAL CHALLENGES
卷 4, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/gch2.201900086
关键词
binder-free flexible carbon films; in situ N-doping; polyindole; porous carbons; supercapacitors
资金
- National Natural Science Foundation of China [51862011, 51662012]
- Jiangxi Outstanding Young Talent Fund Projects [20171BCB23076]
- Natural Science Foundation of Jiangxi Province [20171BAB206013]
- Innovation Driven 5511 Project of Jiangxi Province [20165BCB18016]
- Jiangxi Science and Technology Normal University [2016QNBJRC001]
The low specific capacitance and energy density of carbon electrode has extremely limited the wide application of supercapacitors. For developing a high-performance carbon electrode using a simple and effective method, a fishnet-like, N-doped porous carbon (FNPC) film is prepared by calcining the KOH-activated polyindole precoated on carbon cloths. The FNPC film is tightly anchored on carbon cloths without any binder. The FNPC film with 3.8 at% N content exhibits a fairly high specific capacitance of 416 F g(-1) at 1.0 A g(-1). Moreover, the assembled button-type cell with two FNPC film electrodes shows a high energy density of 16.4 Wh kg(-1), a high power density of 67.4 kW kg(-1), and long-term cyclic stability of 92% of the initial capacitance after 10 000 cycles at 10 A g(-1). The high performances mainly came from the integration of pseudocapacitance and electrical double-layer capacitance behavior, wettability, fishnet-like nanostructure, as well as the low interfacial resistivity. This strategy provides a practical, uncomplicated, and low-cost design of binder-free flexible carbon materials electrode for high-performance supercapacitors.
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