Extracting Renewable Energy from a Salinity Difference Using a Capacitor
Extracting Renewable Energy from a Salinity Difference Using a Capacitor
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DOI：
10.1103/physrevlett.103.058501
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发表时间：
2009-07-31
影响因子：
8.6
通讯作者：
Brogioli, Doriano
中科院分区：
文献类型：
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作者：
Brogioli, Doriano
完全可再生能源可以通过使用不同盐度的水溶液，如河水和海水来生产。许多不同的方法已经为人所知，但开发仍处于原型阶段。本文报道了一种基于双层电电容器技术的新方法。两个多孔电极浸在盐溶液中，构成一个电容器。它首先带电，然后盐溶液与淡水接触。静电能随着溶液中盐的浓度因扩散而降低而增加。该装置可用于将盐度差源转化为完全可再生的能源。给出了实验演示，并对其性能和可能的改进进行了讨论。
Completely renewable energy can be produced by using water solutions of different salinity, like river water and sea water. Many different methods are already known, but development is still at prototype stage. Here I report a novel method, based on electric double-layer capacitor technology. Two porous electrodes, immersed in the salt solution, constitute a capacitor. It is first charged, then the salt solution is brought into contact with fresh water. The electrostatic energy increases as the salt concentration of the solution is reduced due to diffusion. This device can be used to turn sources of salinity difference into completely renewable sources of energy. An experimental demonstration is given, and performances and possible improvements are discussed.