Electrokinetic Supercapacitor for Simultaneous Harvesting and Storage of Mechanical Energy
Electrokinetic Supercapacitor for Simultaneous Harvesting and Storage of Mechanical Energy
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用于同时收集和存储机械能的动电超级电容器
DOI：
10.1021/acsami.7b18640
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发表时间：
2018
影响因子：
9.5
通讯作者：
Zhou Jun
中科院分区：
文献类型：
--
作者：
Yang Peihua;Qu Xiaopeng;Liu Kang;Duan Jiangjiang;Li Jia;Chen Qian;Xue Guobin;Xie Wenke;Xu Zhimou;Zhou Jun
能量收集和存储是两个不同的过程，通常使用基于不同物理和化学原理的两个独立部分来实现。在这里，我们报告了一种自充电电动超级电容器，它直接将能量收集和存储过程耦合到一个设备中。该装置由两个相同的碳纳米管/钛电极组成，由一片阳极氧化铝纳米通道膜隔开。压力驱动的电解质流过纳米通道产生流动电势，其可用于对电容电极充电，从而实现同时的能量产生和存储。该装置在2.5 bar的压力下完全充电后存储0.4 mC cm-2的电荷密度。本文的工作为开发新型自供电系统的能量单元提供了思路。
Energy harvesting and storage are two distinct processes that are generally achieved using two separated parts based on different physical and chemical principles. Here we report a self-charging electrokinetic supercapacitor that directly couples the energy harvesting and storage processes into one device. The device consists of two identical carbon nanotube/titanium electrodes, separated by a piece of anodic aluminum oxide nanochannels membrane. Pressure-driven electrolyte flow through the nanochannels generates streaming potential, which can be used to charge the capacitive electrodes, accomplishing simultaneous energy generation and storage. The device stores electric charge density of 0.4 mC cm–2after fully charging under pressure of 2.5 bar. This work may offer a train of thought for the development of a new type of energy unit for self-powered systems.