Study on the Conductive and Corrosion-Resistant Properties of Pt Coatings on Titanium Substrates

Abstract

Abstract: Proton exchange membrane (PEM) water electrolysers for hydrogen production boast a wide range of flexible and adjustable capabilities, including fast dynamic responses. They hold extensive potential in fields like new energy consumption and power grid peak shaving. To enhance the electrical transmission performance and minimize the contact resistance of the water electrolyser stack, this study employs magnetron sputtering technology to deposit Pt coatings on titanium felt and titanium plates. Scholarly investigation has increasingly adopted innovative methodologies like magnetron sputtering to develop advanced electrode materials. Central to this research is an in-depth examination of the effects of magnetron-sputtered Pt coatings on titanium felts and plates. The study meticulously analyzed these coatings to elucidate their microstructural characteristics, transport properties, and corrosion-resistance. Rigorous experimentation determined the optimal sputtering parameters: a 20 min plasma cleaning phase, a 10 min sputtering period, and a power input of 100 watts. These precise conditions yielded coatings with notable performance attributes. Specifically, the study highlighted a significant reduction in contact resistance for platinum-coated titanium felts, demonstrating the sputtering technique’s ability to enhance charge transfer kinetics efficiently. Analysis of the platinum particle dynamics employed SEM and EDS, revealing that increased sputtering power and duration led to larger platinum particles. However, maintaining a balance is crucial, as excessive particle enlargement may induce compressive forces between particles, causing micro-fissures that could compromise the coatings’ corrosion-resistance. In conclusion, the insights derived from this research are instrumental in improving the overall efficiency and durability of PEM electrolysis systems. By optimizing the fabrication process and understanding the relationship between deposition parameters and material characteristics, this study makes a significant contribution to advancing robust hydrogen production technologies, further supporting the integration of clean energy solutions.

Key words: Pt coating, PEM water electrolysers for hydrogen production, magnetron sputtering, process parameter, microstructure, contact resistance, corrosion-resistant property

CLC Number:

TG174.4

SONG Jie, LIANG Danxi, YUE Luo, XU Guizhi, HU Xiao, CHANG Liang, XU Chao. Study on the Conductive and Corrosion-Resistant Properties of Pt Coatings on Titanium Substrates[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(5): 873-881.

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