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Carbon Quantum Dots Derived from Spent Local Liberica Coffee Ground for Applications in Electric Double-layer Capacitor (EDLC)

PUBLISHED June 11, 2024 (DOI: https://doi.org/10.54985/peeref.2406p2990568)



Grishika Arora1 , HK Jun1
  1. UTAR

Conference / event

The Peeref International Poster Challenger: Summer 2024, June 2024 (Virtual)

Poster summary

Carbon quantum dots (CQDs) represent a relatively recent advancement in carbon nanomaterials, characterized by a sp2/sp3 conjugated core adorned with abundant functional groups such as aldehyde, hydroxyl, and carboxyl. These particles typically exhibit a quasi-spherical shape and are typically smaller than 10 nm. CQDs possess exceptional compactness compared to other carbon materials, resulting in uniform dispersion, improved electron transfer/reservoir capabilities, and a unique structure. In the context of next-generation energy storage applications, CQDs hold significant promise as electrode materials. This study aims to explore the potential of CQDs derived from locally sourced spent coffee grounds as electrode materials to enhance the performance of flexible electric double-layer capacitors (EDLCs). Our objectives include characterizing the synthesized CQDs, optimizing the fabrication process, and evaluating the electrochemical performance of the fabricated EDLCs.


Carbon quantum dots, Supercapacitor, Polymer electrolyte, Spent coffee ground, Specific capacitance

Research areas

Material Sciences, Nanoengineering, Physics


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Additional information

Competing interests
No competing interests were disclosed.
Data availability statement
The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.
Creative Commons license
Copyright © 2024 Arora et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Arora, G., Jun, H. Carbon Quantum Dots Derived from Spent Local Liberica Coffee Ground for Applications in Electric Double-layer Capacitor (EDLC) [not peer reviewed]. Peeref 2024 (poster).
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