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A Microwire Embedded with a NiSe2/MoSe2 Microsupercapacitor with Photoinduced Ultrahigh-Energy Amplification
Shumile Ahmed Siddiqui1, Sunil Batesar2, Harini Em1
1Institute of Nanoscience and Technology, Knowledge City, Sector-81, SAS Nagar, 140306 Mohali, Punjab, India.
Nano Letters
|August 1, 2025
Summary
Researchers developed novel microwire embedded NiSe2/MoSe2 heterostructure microsupercapacitors (MSCs) for enhanced energy storage. This photoenhanced device offers high performance and stability for microelectronics and biomedical applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Microsupercapacitors (MSCs) are crucial for self-powered electronics but face limitations in energy density, stability, and lifespan.
- Addressing these limitations is key for practical adoption in miniaturized devices.
Purpose of the Study:
- To develop a novel microsupercapacitor (MSC) with improved energy storage capabilities.
- To investigate the potential of photoenhanced energy storage using a NiSe2/MoSe2 (NMS) heterostructure.
Main Methods:
- Fabrication of a microwire embedded NiSe2/MoSe2 (NMS) heterostructure for MSCs.
- Performance characterization including capacitance, energy density, and power density measurements.
- Density functional theory (DFT) calculations to understand ion adsorption and quantum capacitance.
Main Results:
- The NMS MSC achieved a volumetric capacitance of ~1014 F cm⁻³, energy density of ~140 mWh cm⁻³, and power density of ~1.6 W cm⁻³.
- DFT calculations showed significantly enhanced quantum capacitance and reduced ion adsorption energy compared to monometallic materials.
- The device demonstrated practical application by powering an LED and a healthcare monitoring device, retaining ~100% capacitance over 60,000 cycles.
Conclusions:
- The novel NMS heterostructure MSC effectively addresses key limitations of conventional MSCs.
- Photoenhanced energy storage in this NMS MSC offers a promising strategy for advanced microelectronics and biomedical applications.
- This work provides a viable pathway for developing high-performance energy storage solutions.
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