Zhao Ye, Wang Leiyang, Li Guo, Rao Chenlu, Pan Yuqi, Chen Borong, Xu Haihong, Mugele Frieder, Wu Hao
School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China.
Physics of Complex Fluids, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, Enschede, 7500 AE, The Netherlands.
Adv Sci (Weinh). 2025 Jul 29:e06517. doi: 10.1002/advs.202506517.
Liquid-based nanogenerators (L-NGs) have emerged as a promising solution for clean energy, appreciated for their minimal friction and effective contact at solid-liquid interfaces. Enclosed L-NGs, in particular, offer the benefits of enhanced durability and versatility. However, a key issue with enclosed L-NGs is the low charge density resulting from triboelectrification at the liquid-solid interface. In this study, this challenge is addressed by employing an electrowetting-assisted charge injection (EWCI) approach to significantly enhance the charge output of the enclosed nanogenerator, which this study refers to as the EW-NG. After EWCI treatment, the charge density has been enhanced by approximately ninefold, achieving a volumetric output charge density of 19.1 mC m, surpassing previous reports. The EWCI also ensures stable charge retention, contributing to the device's exceptional robustness, as evidenced by no significant degradation during intermittent testing over six months. Moreover, the high flexibility of the water within the device allows for operation in various modes and the generation of power from diverse mechanical energy sources. The EW-NG has been successfully demonstrated to power an LCD screen with a size of 10 inches. This adaptability highlights the device's significant potential for applications in energy harvesting and self-powered electronic systems in the field of the Internet of Things.
基于液体的纳米发电机（L-NGs）已成为一种有前景的清洁能源解决方案，因其在固液界面具有极小的摩擦力和有效的接触而受到青睐。特别是封闭式L-NGs，具有增强的耐用性和多功能性等优点。然而，封闭式L-NGs的一个关键问题是液固界面摩擦起电导致的电荷密度低。在本研究中，通过采用电润湿辅助电荷注入（EWCI）方法来显著提高封闭式纳米发电机的电荷输出，本研究将其称为EW-NG，从而解决了这一挑战。经过EWCI处理后，电荷密度提高了约九倍，实现了19.1 mC m的体积输出电荷密度，超过了先前的报道。EWCI还确保了电荷的稳定保留，这有助于提高器件的卓越稳健性，在六个月的间歇测试中未出现明显降解即可证明。此外，器件内水的高柔韧性允许其在各种模式下运行，并从多种机械能来源发电。EW-NG已成功展示可为一个10英寸的液晶显示屏供电。这种适应性突出了该器件在物联网领域的能量收集和自供电电子系统应用中的巨大潜力。
