TY - JOUR
T1 - Cable-like double-carbon layers for fast ion and electron transport
T2 - An example of CNT@NCT@MnO2 3D nanostructure for high-performance supercapacitors
AU - Wang, Yinghui
AU - Zhang, Deyang
AU - Lu, Yang
AU - Wang, Weixiao
AU - Peng, Tao
AU - Zhang, Yingge
AU - Guo, Yan
AU - Wang, Yange
AU - Huo, Kaifu
AU - Kim, Jang Kyo
AU - Luo, Yongsong
N1 - Funding Information:
This work is financially supported by the National Natural Science Foundation of China (Nos. 51502257 , 61574122 , 21373107 and U1304108 ), the Innovative Research Team (in Science and Technology) in Universities in Henan Province (No. 13IRTSTHN018 ), and the program for Science & Technology Innovation Talents in Universities of Henan Province (No. 15HASTIT018 ).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/3
Y1 - 2019/3
N2 - A unique nanostructure consisting of CNTs as carbon matrix, and were sequentially coated with silicon dioxide, N-doped porous carbon tube (NCT) and MnO2 nanoflowers, the final CNT@NCT@MnO2 composites with large internal voids between CNT and NCT. CNT@NCT@MnO2 combines the nanostructural advantages of internal voids and the N-doped porous carbon, presenting fast diffusion paths for ions and electrons, high conductivity and large surface areas. When used as an anode material in supercapacitors, the CNT@NCT@MnO2 tube-in-tube hierarchical nanostructure exhibite a remarkably excellent electrochemical behavior with a specific capacitance (Csp) of 210 F g−1 at the current density of 0.5 A g−1. Moreover, all-solid-state asymmetrical supercapacitors (ASCs) were fabricated using the CNT@NCT@MnO2 composites as anode and the CNT@NCT as cathode, Na2SO4/PVA gel as the electrolyte and the separator. The all-solid-state ASCs also show the superior performance, such as high energy density of ∼14 Wh kg−1 and a power density of ∼3.6 kW kg−1.
AB - A unique nanostructure consisting of CNTs as carbon matrix, and were sequentially coated with silicon dioxide, N-doped porous carbon tube (NCT) and MnO2 nanoflowers, the final CNT@NCT@MnO2 composites with large internal voids between CNT and NCT. CNT@NCT@MnO2 combines the nanostructural advantages of internal voids and the N-doped porous carbon, presenting fast diffusion paths for ions and electrons, high conductivity and large surface areas. When used as an anode material in supercapacitors, the CNT@NCT@MnO2 tube-in-tube hierarchical nanostructure exhibite a remarkably excellent electrochemical behavior with a specific capacitance (Csp) of 210 F g−1 at the current density of 0.5 A g−1. Moreover, all-solid-state asymmetrical supercapacitors (ASCs) were fabricated using the CNT@NCT@MnO2 composites as anode and the CNT@NCT as cathode, Na2SO4/PVA gel as the electrolyte and the separator. The all-solid-state ASCs also show the superior performance, such as high energy density of ∼14 Wh kg−1 and a power density of ∼3.6 kW kg−1.
UR - https://www.scopus.com/pages/publications/85059297641
U2 - 10.1016/j.carbon.2018.11.034
DO - 10.1016/j.carbon.2018.11.034
M3 - Article
AN - SCOPUS:85059297641
SN - 0008-6223
VL - 143
SP - 335
EP - 342
JO - Carbon
JF - Carbon
ER -