With the outlook for green hydrogen production on an impressive rise, Freudenberg Sealing Technologies has applied its expertise in fuel cell sealing solutions to develop advanced sealing solutions for electrolyzers. By bonding its sealing materials to electrolyzer stack plates, the company now offers customers reliable, easy-to-install plate units designed to optimize sealing performance in aggressive electrolyzer environments.
Freudenberg’s sealing experts have taken the lead in producing elastomeric gaskets that are overmolded on to composite and metal electrolyzer stack plates in a four-step process. Stack plates are used to separate the cells in a stack assembly; a crucial component of the plates are gaskets which prevent the leakage of gas into other parts of the electrolyzer. The company is using a portfolio of proprietary rubber-based gasket materials, including EPDM and FKM formulas, to address the unique performance requirements and electro-chemistries found in different types of electrolyzers. In addition, Freudenberg has developed material-specific bonding agents that are applied between the gasket and plate materials to ensure the sealing function is optimized. Extensive material testing, along with advanced injection molding techniques, enable the company to produce high-quality, electrolyzer gasket-plate units that are easily transported to, and installed at, customers’ production sites.
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