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Graphene-based Supercapacitor Using Microemulsion Electrolyte
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DOI：10.1002/batt.202400305.png)
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Abstract
En 中文
Graphene-like material prepared by a facile combustion synthesis was investigated as an electrode material in a microemulsion electrolyte. Notably, a stable voltage window of 2.2-2.4 V was achieved, surpassing previous reports for aqueous-based electrolytes on similar materials. The fabricated supercapacitor device exhibited a commendable specific capacitance values of 59 F g-1 at 0.1 A g-1 and 32 F g-1 at 5 A g-1, indicating its potential for high-current applications. Mechanistic examination revealed that the charge storage primarily relies on electric double-layer formation, with minor non-capacitive contribution from electrode surface functionalities and the supporting electrolyte. Further analysis showed significant capacitive contributions of 85 % at 2.2 V and 67 % at 2.4 V, underscoring the dominance of the capacitive process. The fabricated supercapacitor's stability indicated a decrease as the non-capacitive process intensified, suggesting that electrode surface functionalities predominantly contribute to cell deterioration at elevated potentials. These results highlight the potential efficacy of microemulsion electrolytes in energy storage applications.
Keywords:
supercapacitor
microemulsion electrolyte
graphene
voltage window
combustion synthesis
Journal
B
IF:
4.7
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1.6K
Citations:
4.8K
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