材料科学
纳米技术
气凝胶
水分
生物相容性
纳米孔
纳米材料
膜
化学工程
复合材料
化学
生物化学
工程类
冶金
作者
Weiqing Yang,Xiankai Li,Han Xiao,Weihua Zhang,Zengbin Wang,Xiaomin Ma,Mingjie Li
出处
期刊:Nano Energy
[Elsevier]
日期:2020-05-01
卷期号:71: 104610-104610
被引量:84
标识
DOI:10.1016/j.nanoen.2020.104610
摘要
Artificial asymmetric ionic membranes have attracted great interests in harvesting electricity from ubiquitous water activities, while mostly based on delicately-designed nanopores/nanochannels, either to harness saline water in mimic of cytomembranes or to harness moisture with carbon nanomaterials. Herein, fully biological asymmetric ionic aerogels were fabricated from biological oppositely-charged nanofibrils through a facile freeze-casting method. When exposing to moisture, these nanofibrils may be hydrated by capturing moisture and thus simulate the charged nanochannels for ion transport. Ion dissociation and diffusion ions would induce directional movement of charges, thereby leading to a potential up to 115 mV. With sustainability, biocompatibility and biodegradability, these biological nanogenerators may promise a low-cost and high-efficiency electricity harvest strategy from moist air, being capable of serving as self-powered wearable, biomedical and miniaturized electronic devices.
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