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Nanoenergy Adv., Volume 5, Issue 1 (March 2025) – 2 articles

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34 pages, 14567 KiB  
Review
Perovskite-Based Triboelectric Nanogenerator and Its Application Towards Self-Powered Devices
by Zhangsiyuan Jin, Hening Xing, Yian Hu and Yuljae Cho
Nanoenergy Adv. 2025, 5(1), 2; https://doi.org/10.3390/nanoenergyadv5010002 - 30 Jan 2025
Viewed by 444
Abstract
Research on triboelectric nanogenerators (TENGs) and self-powered devices has rapidly grown in recent years since its first report in 2012 by Prof. Wang’s group. Triboelectric polymers have been a frontier of the research, attributed to their high surface potential and consequently high voltage [...] Read more.
Research on triboelectric nanogenerators (TENGs) and self-powered devices has rapidly grown in recent years since its first report in 2012 by Prof. Wang’s group. Triboelectric polymers have been a frontier of the research, attributed to their high surface potential and consequently high voltage output. To further advance the field, in recent years, photoactive semiconductor materials have been introduced which offer an additional current generation mechanism under light excitation, boosting the output current of the TENG. In addition, the semiconductor-based TENG further provides an ability to detect photo-signals beyond mechanical signals, adding high value towards advanced multi-functional sensor applications. In this regard, this article aims to review the recent progress in semiconductor-based TENGs, particularly on metal-halide perovskites, and their applications to self-powered electronics. Finally, the prospects and challenges of the perovskite-based TENG are discussed. Full article
8 pages, 1737 KiB  
Communication
First-Principle Insights into Positive Triboelectrification of Polyoxymethylene Through Homolytic Bond Rupture
by Giulio Fatti, Hyunseok Ko and Sung Beom Cho
Nanoenergy Adv. 2025, 5(1), 1; https://doi.org/10.3390/nanoenergyadv5010001 - 14 Jan 2025
Viewed by 520
Abstract
Understanding the mechanism underlying triboelectrification (TE) in polymers is crucial for developing cheap and effective triboelectric nanogenerators. Finding out how a polymer becomes tribopositive is especially relevant, as most polymers tend to charge negatively, reducing the power output and the range of applications. [...] Read more.
Understanding the mechanism underlying triboelectrification (TE) in polymers is crucial for developing cheap and effective triboelectric nanogenerators. Finding out how a polymer becomes tribopositive is especially relevant, as most polymers tend to charge negatively, reducing the power output and the range of applications. Thus far, it has remained unclear whether TE in polymers is to be attributed to homolytic ion transfer, heterolytic material transfer, or electronic transfer. Investigating the triboelectrification mechanism of polyoxymethylene by first-principle investigations, this study reveals a novel pathway driven by homolytic bond rupture. Our study demonstrates that the homolytic cleavage of a C–H bond upon contact with a metal surface drives a rearrangement in the oxidation state of the carbon atom, leading its dangling bond to cede an electron to the countersurface, leading to significant positive charging of the POM. This mechanism aligns with the triboelectric series and experimental observations. These insights suggest that TE mechanisms can be more complicated than heterolytic material transfer, depending on material-specific composition and chemistry. This study potentially paves the way for designing materials with tailored triboelectric properties for enhanced nanogenerator performance. Full article
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