Efficient triboelectric nanogenerators with on-demand auxetic structure achieving deformation matching in wearable devices

IF 16.8 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Nano Energy Pub Date : 2025-01-06 DOI:10.1016/j.nanoen.2025.110648
Xinhua Liu , Wei Wang , Xuechuan Wang , Yi Zhou , Linbin Li , Long Xing , Wenlong Zhang , Ouyang Yue
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Abstract

Burgeoning triboelectric nanogenerators (TENGs) receive considerable attentions as versatile and efficient devices for mechanical energy harvesting. Significant challenges remain in enhancing the power-generation efficiency of TENG. Here, an innovative Auxetic Triboelectric Nanogenerator (Auxetic-TENG) incorporating metamaterials with Negative Poisson’s ratio was designed to address the challenges of integrated low power-density and deformation mismatch in complex bending operations. The Auxetic-TENG employs a concave horseshoe-shaped silicone elastomer with synclastic effects as the outer framework of the positive triboelectric layer. The positive triboelectric layer comprises aminated collagen-aggregates composite, while the negative triboelectric layer is constructed from polydimethylsiloxane. The positive and negative triboelectric layers are further enhanced by microstructured convex surface designs, boosting the overall power output. The synclastic effects of the framework induce lateral displacement under uniaxial stretching, significantly improving both electromechanical conversion efficiency and conformability to the human body’s joint-bending. Surprisingly, the Auxetic-TENG derived wearable device achieves an open-circuit voltage of 47 V, which is 2.2 times higher than that of conventional contact-separation TENGs. Additionally, the power density of the Auxetic-TENG can achieve 145.3 mW·m⁻². Comprehensive experimental evaluations confirm the superior performances of the Auxetic-TENG under various bending and stress conditions, demonstrating its promising potential for real-time monitoring applications in healthcare management.

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在可穿戴设备中实现变形匹配的按需形变结构的高效摩擦电纳米发电机
新兴的摩擦电纳米发电机(TENGs)作为一种多功能、高效的机械能量收集装置受到了广泛的关注。在提高TENG发电效率方面仍存在重大挑战。在这里,一种创新的Auxetic摩擦电纳米发电机(Auxetic- teng)结合了负泊松比的超材料,旨在解决复杂弯曲操作中集成低功率密度和变形不匹配的挑战。Auxetic-TENG采用凹形马蹄形有机硅弹性体作为正摩擦电层的外部框架,具有共裂效应。正摩擦电层由酰胺化胶原-聚集体复合材料构成,而负摩擦电层由聚二甲基硅氧烷构成。微结构凸面设计进一步增强了正、负摩擦电层,提高了整体功率输出。框架的共裂效应在单轴拉伸下引起横向位移,显著提高了机电转换效率和对人体关节弯曲的顺应性。令人惊讶的是,auxic - teng衍生的可穿戴设备实现了47 V的开路电压,比传统的触点分离teng高2.2倍。此外,auxica - teng的功率密度可以达到145.3 mW·m⁻²。综合实验评估证实了Auxetic-TENG在各种弯曲和应力条件下的优越性能,显示了其在医疗保健管理中实时监测应用的巨大潜力。
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来源期刊
Nano Energy
Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
30.30
自引率
7.40%
发文量
1207
审稿时长
23 days
期刊介绍: Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.
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