期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 557, 期 -, 页码 617-627出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.09.065
关键词
Supercapacitors; Polypyrrole; Interfacial polymerization; Melamine foam; Compressible device
资金
- Qingdao Innovation Leading Expert Program [13-CX-6]
- China Postdoctoral Science Fonundation [RZ1900011127]
- Qingdao Basic & Applied Research project [15-9-1-100-jch]
Compressible and flexible supercapacitors have aroused enormous interest of many scientific researchers for potential applications in wearable electronic products. However, the design and construction of the electrode with superior mechanical as well as electrical properties still face a lot of challenges. In present work, melamine foamipolypyrrole (MF/PPy) electrode with high deformation-tolerance and excellent electrochemical performance is prepared by in-situ interfacial polymerization of polypyrrole on commercial melamine foam, where PPy nanoparticles with size of 700 nm are uniformly anchored on the MF skeletons. The electrochemical characterizations show that the electrode exhibits excellent specific area capacitance of 2.685 F cm(-2) at 2 mA cm(-2) and good cyclic stability with more than 80% of capacitance remained after 3000 cycles. Furthermore, a symmetrical aqueous supercapacitor is assembled and exhibits an excellent energy density up to 75.95 mu Wh cm(-2) at the power density of 5.82 mW cm(-2) and excellent cycling stability as the current density increases by 10 times. Even under a high strain of 70%, about 95.76% of the initial capacitance is retained after 500 consecutive compressions. These outstanding performances enable the MF/PPy composite a promising candidate for potential applications in compressible and flexible electrochemical energy storage devices. (C) 2019 Elsevier Inc. All rights reserved.
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