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All-Graphene Quantum Dot-Derived Battery: Regulating Redox Activity Through Localized Subdomains
Cited 4 time in
Web of Science
Cited 3 time in Scopus
- Authors
- Issue Date
- 2023-11
- Publisher
- Wiley - V C H Verlag GmbbH & Co.
- Citation
- Small, Vol.19 No.44
- Abstract
- In the quest for materials sustainability for grid-scale applications, graphene quantum dot (GQD), prepared via eco-efficient processes, is one of the promising graphitic-organic matters that have the potential to provide greener solutions for replacing metal-based battery electrodes. However, the utilization of GQDs as electroactive materials has been limited; their redox behaviors associated with the electronic bandgap property from the sp(2) carbon subdomains, surrounded by functional groups, are yet to be understood. Here, the experimental realization of a subdomained GQD-based anode with stable cyclability over 1000 cycles, combined with theoretical calculations, enables a better understanding of the decisive impact of controlled redox site distributions on battery performance. The GQDs are further employed in cathode as a platform for full utilization of inherent electrochemical activity of bio-inspired redox-active organic motifs, phenoxazine. Using the GQD-derived anode and cathode, an all-GQD battery achieves a high energy density of 290 Wh kg(cathode)(-1) (160 Wh kg(cathode+anode)(-1)), demonstrating an effective way to improve reaction reversibility and energy density of sustainable, metal-free batteries.
- ISSN
- 1613-6810
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