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Simple synthesis of hierarchically structured partially graphitized carbon by emulsion/block-copolymer co-template method for high power supercapacitors

Cited 68 time in Web of Science Cited 70 time in Scopus
Authors
Mun, Yeongdong; Jo, Changshin; Hyeon, Taeghwan; Lee, Jaehyuk; Ha, Kyoung-Su; Jun, Ki-Won; Lee, Sang-Hyup; Hong, Seok-Won; Lee, Hyung Ik; Yoon, Songhun; Lee, Jinwoo
Issue Date
2013-11
Citation
Carbon, Vol.64, pp.391-402
Abstract
Hierarchical structure with macropores interconnecting mesopores of carbon material can remarkably improve the rate performance of electric double layer capacitor. However, preformed hard templates such as silica particles or polymer beads have been used in most synthetic procedures for them, resulting in an increase of manufacturing cost and time. Herein, we report novel method for synthesizing hierarchically structured macro/mesoporous partially graphitized carbon (MMPGC) for high power supercapacitor electrode material without pre-formed hard template. Instead of hard template, emulsion/block co-polymer co-template was used for generating macropores and mesopores, respectively. As a supercapacitor electrode material, MMPGC showed higher capacity retention at high current than ordered mesoporous carbon, which is characterized by cyclic voltammetry, galvanostatic charge discharge. In addition, the effect of macropores and partially graphitized wall on reducing resistance of supercapacitor electrode was analyzed in detail with electrochemical impedance spectroscopy fitting method. (C) 2013 Elsevier Ltd. All rights reserved.
ISSN
0008-6223
URI
https://hdl.handle.net/10371/166178
DOI
https://doi.org/10.1016/j.carbon.2013.07.092
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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