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Temperature-controlled in situ synthesized carbon nanotube-protected vanadium phosphate particle-anchored electrospun carbon nanofibers for high energy density symmetric supercapacitors.
Kim, Hyoju; Prasad Tiwari, Arjun; Mukhiya, Tanka; Kim, Hak Yong.
Afiliação
  • Kim H; Department of Carbon Materials and Fiber Engineering, Jeonbuk National University, Jeonju 561-756, Republic of Korea.
  • Prasad Tiwari A; Carbon Nano Convergence Technology Center for Next Generation Engineers (CNN), Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Republic of Korea; Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 561-756, Republic of Korea. Electronic address: tiwariarjuna@g
  • Mukhiya T; Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 561-756, Republic of Korea.
  • Kim HY; Department of Carbon Materials and Fiber Engineering, Jeonbuk National University, Jeonju 561-756, Republic of Korea; Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 561-756, Republic of Korea. Electronic address: dragon4875@gmail.com.
J Colloid Interface Sci ; 600: 740-751, 2021 Oct 15.
Article em En | MEDLINE | ID: mdl-34052529
Designing a novel composite material with hierarchical nanostructures as a negative electrode material with high capacitance and outstanding stability is challenging. To this end, we synthesized carbon nanotubes (CNTs)-protected vanadium phosphate (VPO) nanoparticles trapped within an electrospun carbon matrix (CNTs@VPO@CNFs) for potential use in energy storage applications. Temperature was found to be the major controlling factor for the fabrication of composites with CNT decoration. CNTs@VPO@CNFs exhibited the highest capacitance of 576.1F g-1 at a current density of 0.66 A g-1 among other corresponding electrode materials. Furthermore, this electrode exhibited outstanding stability of up to 99% after 5000 cycles, which was attributed to the coating of core-forming VPO@CNFs by the CNTs as the sheath material. Interestingly, the as-fabricated material worked in a wide potential range from -1.2 to 0.6, thereby providing the opportunity to assemble a symmetric supercapacitor device (SSCD). The SSCD showed an exceptionally high energy density of 69.1 W h kg-1 at a power density of 3.2 kW h and ~ 90% stability after 5000 cycles. Thus, this work presents a strategy for fabricating a new composite as a negative electrode material that can be used in a symmetrical supercapacitor device with an ultrahigh energy density.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article