Bimetallic copper cobalt selenide nanowire-anchored woven carbon fiber-based structural supercapacitors
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- Bimetallic copper cobalt selenide nanowire-anchored woven carbon fiber-based structural supercapacitors
- Deka, Biplab K.; Hazarika, Ankita; Kim, Jisoo; Kim, Namhun; Jeong, Hoon Eui; Park, Young-Bin; Park, Hyung Wook
- Issue Date
- ELSEVIER SCIENCE SA
- CHEMICAL ENGINEERING JOURNAL, v.355, no.1, pp.551 - 559
- 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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