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

Yeongdong Mun, Changshin Jo, Taeghwan Hyeon, Jinwoo Lee, Jaehyuk Lee, Kyoung Su Ha, Ki Won Jun, Sang Hyup Lee, Seok Won Hong, Hyung Ik Lee, Songhun Yoon

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)

Abstract

Hierarchical structure with macropores interconnecting mesopores of carbon material can remarkably improve the rate performance of electric double layer capacitor. However, pre-formed 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.

Original languageEnglish
Pages (from-to)391-402
Number of pages12
JournalCarbon
Volume64
DOIs
Publication statusPublished - 2013 Nov

Bibliographical note

Funding Information:
This work was supported by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education, Science and Technology, Korea. This research was also supported by a National Research Foundation of Korea grant funded by the Korean Government (2012R1A2A2A01002879). This work was further financially supported by the KRICT OASIS Project from Korea Research Institute of Chemical Technology and by the second stage of the BK 21 program of Korea. Additionally, this study was supported by financially supported by the Korea Institute of Science and Technology (KIST) Institutional Program (2E22853-12-105) and supported by Defense Acquisition Program Administration and Agency for Defense Development under the contract UD110090GD. This work was also supported by a grant of the Korea Health 21 R&D Project Ministry of Health & Welfare (A121631).

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science

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