Issue 30, 2024

Self-powered VO2 phase transition based on triboelectric nanogenerator

Abstract

The metal–insulator transition (MIT) of vanadium dioxide (VO2), which involves significant changes in electrical, optical, and other properties, has attracted widespread attention. Here, we report a triboelectric nanogenerator (TENG)-based self-powered VO2 phase transition. With the TENG-induced ionic gel gating, the hydrogen ion insertion/detachment in the VO2 lattice can be modulated at room temperature to cause phase transitions that control light transmittance. The phase transition behavior is characterized by X-ray diffraction and Raman spectroscopy. Under the continuous power supply from TENG, the X-ray diffraction peak of VO2 shifts, and the Raman intensities of characteristic peaks decrease, accompanied by a color change from brown to translucent. The electrical conductivity undergoes a significant change by two orders of magnitude and persists overnight, indicating an excellent duration of the phase transition. In addition, a raindrop TENG-induced VO2 phase transition is demonstrated. The infrared transmittance of VO2 is decreased dramatically by 28.1% due to the phase transition, achieving a heat preservation effect that holds promise for adaptive thermal insulation in smart windows during rainfall through raindrop power generation. This work has realized the TENG-based self-powered VO2 phase transition, holding significant application potential in smart homes.

Graphical abstract: Self-powered VO2 phase transition based on triboelectric nanogenerator

Supplementary files

Article information

Article type
Paper
Submitted
31 May 2024
Accepted
25 Jun 2024
First published
26 Jun 2024

J. Mater. Chem. A, 2024,12, 19052-19059

Self-powered VO2 phase transition based on triboelectric nanogenerator

T. Dang, J. Zhao, J. Zeng, T. Bu, J. Li, Y. Dai, Z. Dong, Y. Feng, Y. Chen and C. Zhang, J. Mater. Chem. A, 2024, 12, 19052 DOI: 10.1039/D4TA03773A

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