期刊
CHEMICAL ENGINEERING JOURNAL
卷 355, 期 -, 页码 551-559出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.08.172
关键词
Structural supercapacitor; Multifunctionality; Solid electrolyte; Electrochemical performance; Mechanical property
资金
- National Research Foundation of Korea (NRF) Grant - Ministry of Science and ICT [NRF-2017R1A5A1015311, NRF-2018R1A2B3007806]
- Ministry of Trade, industry & Energy of Korea [10053248]
Structural supercapacitors provide a variety of opportunities for woven carbon fibers in portable electronics, hybrid automobiles and aerospace applications. We describe herein the synthesis of bimetallic Cu-Co selenide nanowires based on woven carbon fibers, and their use as electrodes in supercapacitors. Woven Kevlar fiber is used as separator for the electrodes and a polyester resin with an ionic liquid and lithium salt is used as solid polymer electrolyte. The supercapacitors exhibit efficient energy storage and significant enhancements in mechanical strength (89.38%) and modulus (70.41%) over those of bare woven carbon fiber base supercapacitors. The specific capacitance of these supercapacitors increases from 0.197 F g(-1) to 28.63 F g(-1) after the growth of nanowires, with accordingly high energy density (191.64 mW h kg(-1)) and power density (36.65 W kg(-1)). In situ mechano-electrochemical tests of these supercapacitors yield excellent capacitance retention (77.3%) at the mechanical failure point (481.29 MPa).
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