Separator for fuel cell
By using a graphite powder composition with a specific particle size and resilience range and epoxy resin, fuel cell separators can be rapidly compressed and molded, solving the problems of insufficient hydrogen impermeability, conductivity, and mechanical properties in short-time molding, and achieving high-efficiency production.
CN122423014APending Publication Date: 2026-07-17NISSHINBO CHEM
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NISSHINBO CHEM
- Filing Date
- 2024-12-10
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing fuel cell separators lack sufficient hydrogen impermeability, electrical conductivity, and mechanical properties when compressed and molded in a short time, and also have low production efficiency.
Method used
A composition comprising graphite powder and epoxy resin is used. The graphite powder has a particle size distribution of 10-20 μm, a volumetric porosity of 12-30 cm³/100g, a powder resistivity of less than 3.0 mΩ·cm, and a resilience of 13%-50%. The separator is prepared by rapid compression molding (less than 40 seconds).
Benefits of technology
Even when formed in a short time, the separator still possesses excellent hydrogen impermeability, electrical conductivity, and mechanical properties, thus improving production efficiency.
✦ Generated by Eureka AI based on patent content.
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Abstract
将树脂组合物成型而成的燃料电池用分隔体即使在以短时间压缩成型的情况下氢气不浸透性、导电性和机械特性也优异，其中，所述树脂组合物包含石墨粉末、以及环氧树脂成分，所述石墨粉末的粒径的累积分布d10为10～20μm，并且按照ASTM D6086测定的容积空隙率在测定压力30MPa加压时为12～30cm3 / 100g，所述环氧树脂成分包含主剂、固化剂和固化促进剂的环氧树脂成分。
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