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 language | English |
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Pages (from-to) | 383-389 |
Number of pages | 7 |
Journal | Journal of Industrial and Engineering Chemistry |
Volume | 82 |
DOIs | |
Publication status | Published - 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