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Updated: Sep 12, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Critical role of quantum and electrical double layer capacitance in 2D electrode/ionic-liquid electrolyte based
Kalyani Mohanty1, Amritha Prabhu1, Ashwath Subrahmanya Subrahmanya Panjikallu1
1Department of Physics, National Institute of Technology Karnataka, Srinivasnagar, Surathkal, Mangalore, Karnataka 575025, India.
Abstract:
This work examines graphene and MXene electrodes integrated with three imidazolium-based ionic liquid electrolytes for supercapacitor applications. Quantum capacitance and electric double-layer capacitance were systematically analyzed to evaluate electrode-electrolyte performance. MXenes exhibited nearly an order of magnitude higher quantum capacitance than multilayer graphene, highlighting their superior suitability. Among the electrolytes, EMIM-TCB showed limited applicability with peak capacitance confined to zero potential. In contrast, BMIM-PFand BMIM-BFdisplayed strong compatibility, particularly with MXenes, delivering enhanced capacitance across a wide potential range due to favorable structural and electrostatic interactions. Overall, the MXene-BMIM-PFcombination emerges as a promising candidate among the investigated materials for high-performance supercapacitors, while the study emphasizes the critical role of interfacial engineering in the design of next-generation energy storage systems.
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