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Updated: Jan 23, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Dual-Window Electrochemical Application of a MoS2@NiFe2O4 Spinel Hybrid Heterostructure: High-Performance Asymmetric
Shatha A Al-Shuayfani1,2, Seyda Tugba Gunday3, Emre Cevik3
1Department of Physics, College of Science, Qassim University, Buraidah, Saudi Arabia.
Abstract:
In this work, MoS2@NiFe2O4 nanocomposites were engineered as electrode materials for both asymmetric (ASSC) and symmetric supercapacitors (SSC). The hybrid electrode combines the layered structure of MoS2 and the redox-active spinel framework of NiFe2O4, offering better electrochemical performance. In the asymmetric configuration, the device demonstrated dual-potential-window functionality over -1.2 to 1.2 V, yielding strong redox activity and pseudocapacitive behavior with a specific capacitance of 102.36 F g- 1 at 10 mV s- 1. In addition, the ASSC attained an energy density of 12.08 Wh kg- 1 at a power density of 750 W kg- 1, exhibiting a Coulombic efficiency of 97.1% and a capacitance retention of 97.22% over 10,000 cycles. A high specific capacitance of 517.57 F g- 1 was achieved at a scan rate of 10 mV s- 1, and 483.42 F g- 1 was recorded using galvanostatic charge-discharge at 1 mA. The SSC achieved an energy density of 67.14 Wh kg- 1 at 750 W kg- 1 and maintained 99.25% of its capacitance after 10,000 cycles, exhibiting remarkably nearly 100% Coulombic efficiency. Mechanical flexibility tests confirmed the device's outstanding structural integrity under bending and twisting, indicating its applicability for flexible energy storage applications.
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