Efficient moisture energy harvesting through electronegativity enhancement and dual-gradient asymmetric structural design

被引：0
作者：
Jing, Mingxing [1 ,2 ]
Fu, Yiyang [1 ,2 ]
Yang, Yu [1 ,2 ]
Zhu, Hongyuan [1 ,2 ]
Wang, Wensheng [1 ,2 ]
Wu, Han [1 ,2 ]
Sun, Zhuangzhi [1 ,2 ]
机构：
[1] Province Key Laboratory of Forestry Intelligent Equipment Engineering, College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin
[2] Key Laboratory of Biobased Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin
来源：
Journal of Environmental Chemical Engineering | 2025年 / 13卷 / 04期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Asymmetric structure; Dual gradient; Electronegativity; Moisture energy harvesting; Wood aerogel;
D O I：
10.1016/j.jece.2025.117391
中图分类号：
学科分类号：
摘要：
Currently, low counter-ion adsorption due to low surface charge density of solids and slow ion flow due to lack of gradient structure are still the key factors restricting the performance of moisture energy harvesters (MEHs). In this study, an efficient MEH based on wood aerogel is developed through electronegativity enhancement and dual-gradient asymmetric structure design. The negative potential of the internal channel is successfully enhanced by introducing ionization groups, resulting in an electric double layer (EDL) with higher counterion concentration. Meanwhile, the rapid movement of ions is further induced by the dual-gradient of water and ion concentration triggered by the surface porous structure and the asymmetry of the overall ionization groups. At 80% relative humidity, the device achieved a peak open-circuit voltage of 650mV and a short-circuit current of 22 μA, approximately 9.1 times the average current of most biomass-based MEHs. In addition, we also designed a forest fire early warning system that is sensitive and can accurately assess the scale of the fire. These groundbreaking findings not only provide innovative ways to develop simple and effective environmental energy harvesting strategies, but also have the potential to expand its application range. © 2025 Published by Elsevier Ltd.
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