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    • 4. 发明申请
    • FUEL CELL COLLECTOR PLATES CONTAINING GRAFTED POLYOLEFINS
    • 含有生物聚合物的燃料电池收集板
    • WO2005004170A1
    • 2005-01-13
    • PCT/CA2004/000976
    • 2004-07-02
    • DUPONT CANADA INC.CAI, YuqiFISHER, John, C.HOJABR, Sassan
    • CAI, YuqiFISHER, John, C.HOJABR, Sassan
    • H01B1/20
    • H01M8/0221H01B1/22H01B1/24H01M8/0206H01M8/0213H01M8/0226H01M8/0228H01M2008/1095
    • A conductive composition for fuel cell collector plates and the molding methods thereof are provided. The molding composition includes a polymer resin and conductive fillers, wherein the polymer resin is a polymer blend comprising (1) from about 10 to 100 wt%, preferably from about 50 to about 100 wt% of a grafted polyolefin or a blend of grafted polyolefins and (2) from 0 to about 90 wt%, preferably from about 0 to about 50 wt% of at least one other thermoplastic polymer having a melting point below 280 o C. One type of or a combination of different types of highly conductive fillers are selected from carbon, graphite, metallic fillers and mixtures thereof. The polymer resin and conductive fillers are blended into a homogeneous mixture and molded into a collector plate. A preferred method of injection molding and a preferred method of injection-compression molding are provided to mold the composition into the shape of a fuel cell collector plate having a volume resistivity of not more than about 0.1 ohm.cm. The collector plate is particularly suitable for, but not limited to, use in polymer electrolyte membrane fuel cells.
    • 提供了一种燃料电池集电板用导电性组合物及其成型方法。 模塑组合物包括聚合物树脂和导电填料,其中聚合物树脂是聚合物共混物,其包含(1)约10至100重量%,优选约50至约100重量%的接枝聚烯烃或接枝聚烯烃的共混物 和(2)0至约90重量%,优选约0至约50重量%的至少一种其它熔点低于280℃的热塑性聚合物。 不同类型的高导电填料的一种类型或组合选自碳,石墨,金属填料及其混合物。 将聚合物树脂和导电填料共混成均匀的混合物并模塑成集电板。 提供注射成型的优选方法和注射压缩成型的优选方法,以将组合物模塑成体积电阻率不超过约0.1欧姆·厘米的燃料电池集电板的形状。 集电板特别适用于但不限于在聚合物电解质膜燃料电池中的应用。