基于双电层作用的环境湿度差发电机理研究
Mechanism Investigation on Humidity Gradient Power Generation Based on the Double-layer Effect in Nanomaterial
严湖平 1刘珍 1綦戎辉1
作者信息
- 1. 华南理工大学化学与化工学院,广州 510640
- 折叠
摘要
环境湿度分布不均在自然界中普遍存在,其中包含着大量可用能量.利用湿度差驱动纳米材料中的电子或自由离子的定向运动、从而产生电能是很有发展前景的.然而,自由离子在纳米材料内部通道中的传递过程尚不明确.为此,本文构建了考虑通道双电层作用的湿度驱动发电理论模型,通过Comsol Multiphysics软件数值求解并进行了实验验证.结果显示,纳米材料内部通道对流经通道的自由离子具有选择透过性,其表面电位越大,离子选择性越强,电压输出越大.同时,通道长度越大,湿度差驱动下的电压输出性能越大,与实际发电器件的运行结果一致.该模拟可通过分析纳米通道内的离子分布,以预测不同种类和尺寸纳米颗粒的电压输出,为后续研究中的材料选择和装配提供指导.
Abstract
The uneven distribution of environmental humidity is commonly observed in nature and contains a significant amount of available energy.The utilization of humidity gradient to drive the di-rectional movement of electrons or free ions in nanomaterials,thereby generating usable electrical en-ergy,holds great development potential.However,the process of free ion transport in nano-channels remains unclear.In this study,we established theoretical model for humidity-driven power gener-ation,which considers the double layer effect in micro-nano channels.The model was numerically solved using Comsol Multiphysics software and experimentally validated.The results demonstrated that nano-channels exhibit selective permeability to the free ions flowing through them,with greater surface potential leading to stronger ion selectivity and higher voltage output.Furthermore,the longer the length of the channels,the greater the voltage output under humidity-driven conditions,consistent with the practical performance of power generators.This simulation can be utilized to analyze the ion distribution within nanomaterial and predict the voltage output of different types and sizes of nanoparticles,providing guidance for the material selection and fabrication in future.
关键词
发电/湿度差/双电层/模拟/纳米通道Key words
power generation/humidity gradient/double-layer effect/simulation/nanochannels引用本文复制引用
基金项目
国家自然科学基金(52122605)
国家自然科学基金(51936005)
广东省高层次人才项目(2017GC010226)
出版年
2024
NETL
NSTL
维普
万方数据