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  • Supercapacitor electrode materials with hierarchically structured pores from carbonization of MWCNTs and ZIF-8 composites

    Author(s)
    Li, Xueqin
    Hao, Changlong
    Tang, Bochong
    Wang, Yue
    Liu, Mei
    Wang, Yuanwei
    Zhu, Yihua
    Lu, Chenguang
    Tang, Zhiyong
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2017
    Metadata
    Show full item record
    Abstract
    Due to their high specific surface area and good electric conductivity, nitrogen-doped porous carbons (NPCs) and carbon nanotubes (CNTs) have attracted much attention for electrochemical energy storage applications. In the present work, we firstly prepared MWCNT/ZIF-8 composites by decoration of zeolitic imidazolate frameworks (ZIF-8) onto the surface of multi-walled CNTs (MWCNTs), then obtained MWCNT/NPCs by the direct carbonization of MWCNT/ZIF-8. By controlling the reaction conditions, MWCNT/ZIF-8 with three different particle sizes were synthesized. The effect of NPCs size on capacitance performance has been evaluated ...
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    Due to their high specific surface area and good electric conductivity, nitrogen-doped porous carbons (NPCs) and carbon nanotubes (CNTs) have attracted much attention for electrochemical energy storage applications. In the present work, we firstly prepared MWCNT/ZIF-8 composites by decoration of zeolitic imidazolate frameworks (ZIF-8) onto the surface of multi-walled CNTs (MWCNTs), then obtained MWCNT/NPCs by the direct carbonization of MWCNT/ZIF-8. By controlling the reaction conditions, MWCNT/ZIF-8 with three different particle sizes were synthesized. The effect of NPCs size on capacitance performance has been evaluated in detail. The MWCNT/NPC with large-sized NPC (MWCNT/NPC-L) displayed the highest specific capacitance of 293.4 F g-1 at the scan rate of 5 mV s-1 and only lost 4.2% of capacitance after 10 000 cyclic voltammetry cycles, which was attributed to the hierarchically structured pores, N-doping and high electrical conductivity. The studies of symmetric two-electrode supercapacitor cells also confirmed MWCNT/NPC-L as efficient electrode materials that have good electrochemical performance, especially for high-rate applications.
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    Journal Title
    Nanoscale
    Volume
    9
    Issue
    6
    DOI
    https://doi.org/10.1039/c6nr08987a
    Subject
    Physical sciences
    Chemical sciences
    Science & Technology
    Physical Sciences
    Technology
    Chemistry, Multidisciplinary
    Nanoscience & Nanotechnology
    Publication URI
    http://hdl.handle.net/10072/408317
    Collection
    • Journal articles

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