Power Generation by Reverse Electrodialysis in a Microfluidic Device with a Nafion Ion-Selective Membrane
AbstractAn 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. View Full-Text
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Tsai, T.-C.; Liu, C.-W.; Yang, R.-J. Power Generation by Reverse Electrodialysis in a Microfluidic Device with a Nafion Ion-Selective Membrane. Micromachines 2016, 7, 205.
Tsai T-C, Liu C-W, Yang R-J. Power Generation by Reverse Electrodialysis in a Microfluidic Device with a Nafion Ion-Selective Membrane. Micromachines. 2016; 7(11):205.Chicago/Turabian Style
Tsai, Tsung-Chen; Liu, Chia-Wei; Yang, Ruey-Jen. 2016. "Power Generation by Reverse Electrodialysis in a Microfluidic Device with a Nafion Ion-Selective Membrane." Micromachines 7, no. 11: 205.
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