A Microwire Embedded with a NiSe<sub>2</sub>/MoSe<sub>2</sub> Microsupercapacitor with Photoinduced Ultrahigh-Energy Amplification.
basic_science · Level V
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- Record sourced from PubMed, PMID 40750329.
- Also identified by DOI 10.1021/acs.nanolett.5c03238.
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Abstract
Microsupercapacitors (MSCs) have emerged as promising miniaturized energy-storage devices for self-powered electronics. However, their practical adoption is hindered by insufficient energy density, poor stability, and short lifespan, necessitating solutions for improved practicability. Herein, we report a novel microwire embedded NiSe<sub>2</sub>/MoSe<sub>2</sub> (NMS) heterostructure MSC that addresses these challenges through photoenhanced energy storage. The device showcases a remarkable performance with a volumetric capacitance of ∼1014 F cm<sup>-3</sup>, an energy density of ∼140 mWh cm<sup>-3</sup>, and a power density of ∼1.6 W cm<sup>-3</sup>. Density functional theory calculations reveal 33-fold higher quantum capacitance and 16-fold lower OH<sup>-</sup> ion adsorption energy compared to pristine monometallic counterparts. Notably, the device powers a red light-emitting diode for 3 min after 1 min of charging, supports a healthcare monitoring device for up to 6 h, and retains ∼100% capacitance over 60000 cycles with 95% Columbic efficiency. Overall, this strategy offers a viable pathway to improve the MSC performance for next-generation microelectronics and biomedical applications.