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 journalArticlepeer-review

    19 Citations (Scopus)

    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

    Bibliographical note

    Funding Information:
    This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) ( 20183030032010 ). And this work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) ( 20172410100150 ). Appendix A

    Publisher Copyright:
    © 2019

    Keywords

    • Activated carbon
    • Alkali activation
    • Carbon dot
    • Supercapacitor

    ASJC Scopus subject areas

    • General Chemical Engineering

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