Ribbon-like activated carbon with a multi-structure for supercapacitors

Mok Hwa Kim, Kwang Bum Kim, Kisuk Kang, Joong Tark Han, Kwang Chul Roh

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ribbon-like activated carbon (RAC) has been successfully developed by a two-step activation process based on alkali activation and an electrochemical activation route. The multi-structure of the RAC features a porous graphitic structure with the coexistence of micropores and graphitic structures, mainly originating from the loose packing of the graphite sheets as a result of the degree of graphitization controlled by the carbonization conditions. RAC provides the tremendous benefits of excellent cycle life, high power (3.2 kW kg-1), and high energy density (43.5 W h kg-1) for electric double-layer capacitors, because of its graphitic architecture comprised of micropores and ring-shaped crystalline structures. In addition to investigating the improved electrochemical performance, we observed an interesting feature of the RAC: the obtained RAC has a high structural stability as shown by ex situ high-resolution transmission electron microscopy (HR-TEM). These extraordinary results are attributed to the unique structure of RAC.

Original languageEnglish
Pages (from-to)14008-14012
Number of pages5
JournalJournal of Materials Chemistry A
Volume1
Issue number44
DOIs
Publication statusPublished - 2013 Jan 1

Fingerprint

Activated carbon
Chemical activation
Graphitization
Graphite
Carbonization
Alkalies
High resolution transmission electron microscopy
Supercapacitor
Life cycle
Crystalline materials

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Kim, Mok Hwa ; Kim, Kwang Bum ; Kang, Kisuk ; Han, Joong Tark ; Roh, Kwang Chul. / Ribbon-like activated carbon with a multi-structure for supercapacitors. In: Journal of Materials Chemistry A. 2013 ; Vol. 1, No. 44. pp. 14008-14012.
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Ribbon-like activated carbon with a multi-structure for supercapacitors. / Kim, Mok Hwa; Kim, Kwang Bum; Kang, Kisuk; Han, Joong Tark; Roh, Kwang Chul.

In: Journal of Materials Chemistry A, Vol. 1, No. 44, 01.01.2013, p. 14008-14012.

Research output: Contribution to journalArticle

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