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

被引：84

作者：

Mun, Yeongdong ^{[1
]}

Jo, Changshin ^{[1
]}

Hyeon, Taeghwan ^{[2
]}

Lee, Jaehyuk ^{[1
]}

Ha, Kyoung-Su ^{[3
]}

Jun, Ki-Won ^{[3
]}

Lee, Sang-Hyup ^{[4
]}

Hong, Seok-Won ^{[4
]}

Lee, Hyung Ik ^{[5
]}

Yoon, Songhun ^{[6
]}

Lee, Jinwoo ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, World Class Univ Program Chem Convergence Energy, Seoul 151744, South Korea

[3] KRICT, Green Chem Technol Div, Taejon 305600, South Korea

[4] KIST, Ctr Water Resource Cycle Res, Seoul 136791, South Korea

[5] Agcy Def Dev, Taejon 305600, South Korea

[6] Chung Ang Univ, Dept Integrat Engn, Seoul 156756, South Korea

来源：

CARBON | 2013年 / 64卷

基金：

新加坡国家研究基金会;

关键词：

DOUBLE-LAYER CAPACITOR; MESOPOROUS CARBONS; POROUS CARBONS; ACTIVATED CARBONS; MESOPHASE PITCH; PORE STRUCTURE; ELECTRODES; PERFORMANCE; BEHAVIOR; SILICA;

D O I：

10.1016/j.carbon.2013.07.092

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：391 / 402

页数：12