文献类型：期刊文献

英文题名：Supercapacitor electrode materials with hierarchically structured pores from carbonization of MWCNTs and ZIF-8 composites

作者：Li, Xueqin[1,2];Hao, Changlong[2];Tang, Bochong[2];Wang, Yue[2,4];Liu, Mei[2,4];Wang, Yuanwei[1];Zhu, Yihua[1];Lu, Chenguang[2,3];Tang, Zhiyong[2,3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Natl Ctr Nanosci & Technol, CAS Key Lab Nanosyst & Hierarchy Fabricat, Beijing 100190, Peoples R China;[3]Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China;[4]China Univ Petr, Beijing 102249, Peoples R China

年份：2017

卷号：9

期号：6

起止页码：2178

外文期刊名：NANOSCALE

收录：;EI(收录号：20170703349623);WOS:【SCI-EXPANDED(收录号:WOS:000395626600010)】；

基金：This work was supported financially by Chinese ministry of science and technology (no. 2016 YFA0200700), National Key Basic Research Program of China (2014CB931801, Z. Y. T.), National Natural Science Foundation of China (21676093, Y. H. Z.; 21471056, Y. H. Z.; 21473044, C. G. L.; 21475029 and 91427302, Z. Y. T.), Instrument Developing Project of the Chinese Academy of Sciences (YZ201311, Z. Y. T.), CAS-CSIRO Cooperative Research Program (GJHZ1503, Z. Y. T.), and "Strategic Priority Research Program" of Chinese Academy of Sciences (XDA09040100, Z. Y. T.).

语种：英文

外文关键词：Electric conductivity - Carbonization - Electrochemical electrodes - Capacitance - Cyclic voltammetry - Doping (additives) - Multiwalled carbon nanotubes (MWCN) - Supercapacitor

摘要：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.