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A bismuth oxide nanosheet-coated electrospun carbon nanofiber film: a free-standing negative electrode for flexible asymmetric supercapacitors
- Li, Lu, Zhang, Xitian, Zhang, Zhiguo, Zhang, Mingyi, Cong, Lujia, Pan, Yu, Lin, Shuangyan
- Journal of materials chemistry A 2016 v.4 no.42 pp. 16635-16644
- bismuth, carbon nanofibers, electrochemistry, electrodes, energy density, light emitting diodes, nanocomposites
- The development of a negative electrode for supercapacitors is very critical for the next-generation of energy-storage devices while it remains a great challenge. Herein, a flexible and free-standing nanocomposite electrode of Bi₂O₃-decorated electrospun carbon nanofibers (ESCNFs) was prepared via electrospinning technology and a simple solvothermal method. The electrochemical performance of the nanocomposite electrode was investigated. An asymmetric supercapacitor (ASC) device made of the ESCNF@Bi₂O₃ negative electrode and CF@NiCo₂O₄ positive electrode was developed. It achieved excellent electrochemical properties including high energy density, high power density, and outstanding cycling stability. Moreover, the ability to power light-emitting diodes also indicates the feasibility for practical use. This work holds great promise for developing next-generation supercapacitors with high energy density.