Graphene Oxide Sponge with Gradient Porosity for Moisture-Electric Generator  

作　　者：Hongtao Liu Yifan Han Xiaolong Zhang Yurong Zhang Gang Li Zhen Lin Yifeng Lei Daobing Chen Longjian Xue 

机构地区：[1]School of Power and Mechanical Engineering,Wuhan University,Wuhan,430072,People’s Republic of China [2]The Institute of Technological Science,Wuhan University,Wuhan,430072,People’s Republic of China [3]Hubei Key Laboratory of Electronic Manufacturing and Packaging Integration(Wuhan University),Wuhan University,Wuhan,430072,People’s Republic of China

出　　处：《Journal of Bionic Engineering》2025年第2期783-792,共10页仿生工程学报(英文版)

基　　金：supported by National Natural Science Foundation of China(52373119,52105296,62161160311);National Key R&D Program of China(2022YFB4701000);Open Fund of Hubei Key Laboratory of Electronic Manufacturing and Packaging Integration(Wuhan University)(EMPI2023020).

摘　　要：Moisture can be utilized as a tremendous source of electricity by emerging moisture-electric generator (MEG). The directional moving of water molecules, which can be driven by gradient of functional groups and water evaporation, is vital for the electricity generation. Here, MEG composed of Graphene Oxide (GO-MEG) with gradient channels is constructed by one-step ice-templating technique, achieving a voltage of 0.48 V and a current of ~ 5.64 µA under humid condition. The gradient channels introduce Laplace pressure difference to the absorbed water droplets and electric potential between two side of the GO-MEG, facilitating the charge flow. Output voltage can be easily enhanced by increasing the structural gradient, reducing the channel size, incorporation of chemical gradient, or scaling up the number of GO-MEG units in series. This work not only provides insight for the working mechanism of GO-MEG with structural gradient, which can be applied to other functional materials, but also establishes a convenient and ecofriendly strategy to construct and finely tune the structural gradient in porous materials.

关 键 词：Moisture-electric generator Graphene oxide Ice templating Structural gradient 

分 类 号：TB3[一般工业技术—材料科学与工程]