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首页> 外文期刊>Russian journal of electrochemistry >Carbon Nanofiber Paper Cathode Modification for Higher Performance of Phosphoric Acid Fuel Cells on Polybenzimidazole Membrane
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Carbon Nanofiber Paper Cathode Modification for Higher Performance of Phosphoric Acid Fuel Cells on Polybenzimidazole Membrane

机译：碳纳米纤维纸阴极改性，用于磷酸燃料电池较高性能的聚苯旁咪唑膜

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摘要

Entire carbon nanofiber mats (carbon nanofiber paper) based on polyacrylonitrile pyropolymer composite were prepared by the preliminary oxidation (stabilization) of the initial polymer at 250-350 degrees C in air and following pyrolysis at 800-1200 degrees C under vacuum. The mats were tested as cathodes in a fuel cell on polybenzimidazole membrane. Properties of the pyropolymers which were obtained by polymer carbonization could be significantly changed by the addition of specific additives to polyacrylonitrile and also by changing thermal treatment. Particularly, the addition of Ketjen Black (R) or Vulcan (R) XC72 carbon blacks and polyvinyl pyrrolidone during electrospinning step resulted in increase of material electrical conductivity and inner porosity, which is important for improving fuel cell performance. Depending on oxidation and pyrolysis temperature, the physical properties of platinated carbon nanofiber paper and the efficiency of a fuel cell on polybenzimidazole membrane significantly change.
机译：通过在空气中的初始聚合物的初始氧化（稳定化）在空气中的初始氧化（稳定化）和在真空下以800-1200℃下垂的初始氧化（稳定化）制备整个碳纳米纤维垫（碳纳米纤维纸）。将垫作为阴极在聚苯旁咪唑膜上的燃料电池中进行测试。通过将特定添加剂加入聚丙烯腈和通过改变热处理，可以显着改变通过聚合物碳化获得的吡聚物的性质。特别地，在静电纺丝步骤中添加Ketjen黑色（R）或硫磺（R）XC72炭黑和聚乙烯吡咯烷酮导致材料导电性和内部孔隙率的增加，这对于改善燃料电池性能是重要的。取决于氧化和热解温，浸渍碳纳米纤维纸的物理性质及燃料电池对聚苯哌咪唑膜的效率显着变化。

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