Optimum structural properties for an anode current collector used in a polymer electrolyte membrane water electrolyzer operated at the boiling point of water

JOURNAL OF POWER SOURCES

卷:332

Article

Li, Hua¹  Fujigaya, Tsuyohiko²  Nakajima, Hironori¹  Inada, Akiko¹  Ito, Kohei^1,2 

[1] Kyushu Univ, Grad Sch Engn, Dept Hydrogen Energy Syst, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8190395, Japan

[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8190395, Japan

关键词: Current collector;    Thickness;    Contact angle;    Pore diameter;    Electrolysis voltage;    Body;   

DOI  :  10.1016/j.jpowsour.2016.09.086

来源: Elsevier

【 摘 要 】

This study attempts to optimize the properties of the anode current collector of a polymer electrolyte membrane water electrolyzer at high temperatures, particularly at the boiling point of water. Different titanium meshes (4 commercial ones and 4 modified ones) with various properties are experimentally examined by operating a cell with each mesh under different conditions. The average pore diameter, thickness, and contact angle of the anode current collector are controlled in the ranges of 10-35 mu m, 0.2 -0.3 mm, and 0-120 degrees, respectively. These results showed that increasing the temperature from the conventional temperature of 80 degrees C to the boiling point could reduce both the open circuit voltage and the overvoltages to a large extent without notable dehydration of the membrane. These results also showed that decreasing the contact angle and the thickness suppresses the electrolysis overvoltage largely by decreasing the concentration overvoltage. The effect of the average pore diameter was not evident until the temperature reached the boiling point. Using operating conditions of 100 degrees C and 2 A/cm(2), the electrolysis voltage is minimized to 1.69 V with a hydrophilic titanium mesh with an average pore diameter of 21 mu m and a thickness of 0.2 mm. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free