Power generation by reverse electrodialysis in a microfluidic device with a Nafion ion-selective membrane

Tsung Chen Tsai, Chia Wei Liu, Ruey Jen Yang

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

An energy conversion microchip consisting of two circular microchambers and a Nafion-filled microchannel is fabricated using standard micro-electro-mechanical systems (MEMS) techniques. When the chambers are filled with KCl solutions with different concentrations, the Nafion microchannel acts as a cation-selective membrane and results in the generation of electrical power through a reverse electrodialysis (RED) process. The current-potential characteristics of the Nafion membrane are investigated for devices with various microchannel lengths and electrolyte concentration ratios. It is shown that for a given voltage, the current and generated power increase with a reducing channel length due to a lower resistance. In addition, a maximum power density of 755 mW/m2 is obtained given an electrolyte concentration ratio of 2000:1 (unit is mM). The optimal device efficiency is found to be 36% given a channel length of 1 mm and a concentration ratio of 1000:1 (mM). Finally, no enhancement of the short circuit current is observed at higher concentration ratios..

原文English
文章編號205
期刊Micromachines
7
發行號11
DOIs
出版狀態Published - 2016 十一月 10

All Science Journal Classification (ASJC) codes

  • 控制與系統工程
  • 機械工業
  • 電氣與電子工程

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