Electromechanical and electrochemical properties of highly filled Titanium composites for PEM bipolar plates

• DOI: 10.1007/s00339-022-06304-3
• Publication Date: 2023-01-10T11:04:10Z
• Authors: Maria Gaudig; Wolfram Münchgesang; Juliana Martins d...; Fabian Pascher; Thorsten Hickmann; Ralf B. Wehrspohn
• Keywords: Titanium alloy

Abstract Titanium polymer composites are evaluated concerning their suitability as bipolar plates in acid water electrolysis a replacement of milled plates. It turns out that our highly filled with 80 wt.-% powder meet all criteria given by US Department Energy electric conductivity and mechanical stability. Concerning the electrochemical corrosion test, an improved behavior is obtained coating 0.5 $$\mu$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>μ</mml:mi> </mml:math> m thin layer. The coated composite plate has been successfully integrated PEM fuel cell. polarization curves show good performances for short time, but further improvements on surface roughness need to be made long-time