Textile-Based Asymmetric Hierarchical Systems for Constant Hydrovoltaic Electricity Generation
Textile-Based Asymmetric Hierarchical Systems for Constant Hydrovoltaic Electricity Generation
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DOI：
10.1016/j.cej.2021.133236
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发表时间：
2021-10
影响因子：
15.1
通讯作者：
Jinhao Xie;Yuanfeng Wang;Shiguo Chen
中科院分区：
文献类型：
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作者：
Jinhao Xie;Yuanfeng Wang;Shiguo Chen
将自然资源转化为电力是向可持续能源生产过渡的重要组成部分。蒸发驱动的湿发电机（EMEGs）是一项新兴技术，在收集清洁能源方面显示出巨大的潜力。本文报道了一种基于非对称微纳分层毛细系统在棉织物上装饰的柔性纺织品肌电信号。当水滴遇到这种纺织EMEG时，水在毛细作用下自发流动，无需外部电源，在2cm × 5.5 cm × 0.2 mm的小块样品上恒定产生高达0.65 V的电压和高达8 μA的电流（0.16 mL水可以产生超过3600 s的恒定电输出）。更重要的是，即使在完全湿润或完全浸入水中时，由于其固有的电化学不对称性，EMEG也可以保持其电输出。此外，可以通过集成多个单元来增强输出，产生足够的功率来驱动LED设备，同时能量也可以存储在超级电容器中。该研究对设计多用途发电机以持续获取清洁能源具有重要价值。
Converting natural resources into electricity is an essential part of the transition to sustainable energy generation. Evaporation-driven moist-electric generators (EMEGs) are an emergent technology and show great potential for harvesting clean energy. In this paper, we report a flexible textile EMEG based on the decoration of an asymmetric micro-nano hierarchical capillary system on the cotton fabric. When water droplets encounter this textile EMEG, the water flows spontaneously under capillary action without requiring an external power supply, resulting in a constant generation of voltages up to 0.65 V and currents up to 8 μA on a small piece of sample with size of 2 cm × 5.5 cm × 0.2 mm (0.16 mL of water can induce a constant electric output for more than 3600 s). More importantly, even when fully wetted or totally immersed in water, the EMEG can maintain its electrical output owing to its inherent electrochemical asymmetry. Furthermore, the output can be enhanced by integrating multiple units, generating sufficient power to drive LED devices, while the energy can also be stored in supercapacitors. This study is of high value for designing of versatile electric generator to harvest clean energy constantly.