Key Laboratory for Advanced Materials Processing Technology, Ministry of Education of China, State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
Adv Mater. 2019 Jan;31(2):e1805705. doi: 10.1002/adma.201805705. Epub 2018 Nov 15.
Moisture-triggered electricity generation has attracted much attention because of the effective utilization of the water-molecule diffusion process widely existing in atmosphere. However, the monotonous and rigid structures of previously developed generators have heavily restricted their applications in complex and highly deformable working conditions. Herein, by a rational configuration design with a versatile laser processing strategy, graphene-based hygroelectric generators (GHEGs) of sophisticated architectures with diversified functions such as rollable, stretchable, and even multidimensional transformation are achieved for the first time. More importantly, a wide range of 3D deformable generators that can automatically assemble and transform from planar geometries into spacial architectures are also successfully fabricated, including cubic boxes, pyramids, Miura-ori, and footballs. These GHEGs demonstrate excellent electricity-generation performance in curling and elongating states. The generated voltages are easily up to 1.5 V under humidity variation in atmosphere, powering a variety of commercial electronic components. These deformable GHEGs can be applied on complicated surfaces, human bodies, and many more beyond those demonstrated in this work.
由于有效利用了广泛存在于大气中的水分子扩散过程，水分触发的发电技术引起了广泛关注。然而，以前开发的发电机结构单调且僵硬，严重限制了它们在复杂和高度可变形工作条件下的应用。在此，通过合理的配置设计和多功能激光加工策略，首次实现了具有复杂结构和多样化功能的基于石墨烯的湿发电（GHEG），例如可卷曲、可拉伸，甚至多维转换。更重要的是，还成功制造了一系列广泛的 3D 可变形发电机，它们可以从平面形状自动组装和转换为空间结构，包括立方盒、金字塔、宫原式褶皱和足球。这些 GHEG 在卷曲和拉伸状态下表现出优异的发电性能。在大气湿度变化下，可产生高达 1.5V 的电压，为各种商用电子元件供电。这些可变形 GHEG 可以应用于复杂表面、人体等，超出了本工作所展示的应用范围。
