Preparation of activated carbon decorated with carbon dots and its electrochemical performance

Su Jin Jang, Yun Chan Kang, Kwang Chul Roh

Research output: Contribution to journalArticle

Abstract

Activated carbon decorated with carbon dots (ACD) was synthesized using an alkali activation process, in which metallic potassium expands the layer stacks and scissored turbostratic-structured carbon surface into nanosized particles. In addition, we demonstrated a capacitive effect in supercapacitors based on ACD, which has a high electrical conductivity because of the electronic pathway between the surface defects on activated carbon. The cyclic voltammogram curve was less distorted when the scan rate was increased to 100 mV s-1. Improved additional volumetric capacitance of up to 123.2 F cc-1 was achieved because the carbon dots provided additional capacitance resulting from intercalation into the graphitic carbon structure. The results obtained herein pave new ways for application of nanocarbons in energy storage.

Original languageEnglish
Pages (from-to)383-389
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume82
DOIs
Publication statusPublished - 2020 Feb 25

Fingerprint

Activated carbon
Carbon
Capacitance
Surface defects
Alkalies
Intercalation
Energy storage
Potassium
Chemical activation

Keywords

  • Activated carbon
  • Alkali activation
  • Carbon dot
  • Supercapacitor

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Preparation of activated carbon decorated with carbon dots and its electrochemical performance. / Jang, Su Jin; Kang, Yun Chan; Roh, Kwang Chul.

In: Journal of Industrial and Engineering Chemistry, Vol. 82, 25.02.2020, p. 383-389.

Research output: Contribution to journalArticle

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