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A High-Performance Supercapacitor Based on KOH Activated 1D C70 Microstructures

Zheng, Shushu ; Ju, Hui ; Lu, Xing

Advanced energy materials, 2015-11, Vol.5 (22), p.n/a [Periódico revisado por pares]

Weinheim: Blackwell Publishing Ltd

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  • Título:
    A High-Performance Supercapacitor Based on KOH Activated 1D C70 Microstructures
  • Autor: Zheng, Shushu ; Ju, Hui ; Lu, Xing
  • Assuntos: bimodal pores ; fullerenes ; functionalization ; KOH activation ; supercapacitors
  • É parte de: Advanced energy materials, 2015-11, Vol.5 (22), p.n/a
  • Notas: ark:/67375/WNG-TNQ4KDCR-3
    National Thousand Talents Program of China
    Program for Changjiang Scholars and Innovative Research Team in University - No. IRT1014
    istex:6CC766001A85D5B32FA9A30232685B2F18FA0C65
    NSFC - No. 21171061; No. 51472095
    HUST
    ArticleID:AENM201500871
  • Descrição: Fullerenes are of tremendous interest from fundamental researches to applied perspectives in the past decades. However, their application in supercapacitors has been underdeveloped for a long time. Here, the KOH activation of C70 microtubes is reported at high temperatures, which provides activated samples exhibiting excellent capacitive properties. The improved capacitive performance can be attributed to three aspects: the generation of macropores and micropores, the introduction of oxygen functionalities, and the formation of graphitic carbons from ellipsoidal fullerenes. The optimum activated state for supercapacitor application is achieved at 600 °C, at which the product exhibits the best electrochemical behavior with a gravimetric capacitance of 362.0 F g−1 at 0.1 A g−1 and excellent cycling stability with capacitance retention of 92.5% over 5000 cycles at 1 A g−1. High‐temperature KOH activation of C70 microtubes produces corresponding 3D carbon materials containing both macropores and micropores, which exhibit excellent capacitive performances with typical capacitances of as high as 362.0 F g−1. This is much better than that of the original microtubes (3.7 F g−1), opening a wide avenue toward the applications of fullerenes the energy storage.
  • Editor: Weinheim: Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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