Sulfonated Polybenzimidazole (SPBI)

Sulfonated polybenzimidazole (SPBI) is a high-performance specialty polymer material obtained by sulfonating polybenzimidazole (PBI), combining PBI’s exceptional thermal stability with the proton-conducting advantages of sulfonic acid groups. It exhibits a thermal decomposition temperature exceeding 510°C, excellent chemical resistance, and high mechanical strength, enabling long-term stable operation under extreme service conditions.
As a core proton-exchange membrane material, SPBI exhibits excellent proton conductivity, making it well-suited for medium- and high-temperature fuel cells and all-vanadium redox flow batteries. It can replace conventional fluorinated membranes, reducing costs while being environmentally friendly. Our company has achieved precise synthesis and scalable production of SPBI, with controllable sulfonation levels and outstanding film-forming properties. The product is widely used in hydrogen energy storage, new‑energy vehicles, aerospace, and other fields, supporting the domestic substitution of critical materials.

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Product Details

Sulfonated polybenzimidazole (SPBI) is a high-performance specialty polymer obtained by sulfonating polybenzimidazole (PBI), combining PBI’s exceptional thermal stability with the proton-conducting advantages of sulfonic acid groups. It exhibits a thermal decomposition temperature exceeding 510°C, excellent chemical resistance, and high mechanical strength, enabling long-term stable operation under extreme service conditions.
As a core proton-exchange membrane material, SPBI exhibits excellent proton conductivity, making it well-suited for medium- and high-temperature fuel cells and all-vanadium redox flow batteries. It can replace conventional fluorinated membranes, reducing costs while being environmentally friendly. Our company has achieved precise synthesis and scalable production of SPBI, with controllable sulfonation levels and outstanding film-forming properties. The product is widely used in hydrogen energy storage, new‑energy vehicles, aerospace, and other fields, supporting the domestic substitution of critical materials.

Apexazole® C Series PBI

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