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<p>In this study, polyacrylonitrile-based carbon felt (PANCF) was successfully prepared from polyacrylonitrile oxidized felt (PANOF) by sequential low-temperature pre-pressing, resin impregnation, hot pressing, and carbonization procedures. Subsequently, boron-doped modification of the carbon felt was carried out through boric acid solution impregnation and graphitization treatment. The effects of different concentrations of boric acid solution and graphitization temperatures on the morphology, structure, and performance of the carbon felt were investigated. The results showed that PANCF modified with 5 wt.% boric acid solution and graphitized at 2200&#xa0;°C exhibited excellent electrical conductivity and graphitization degree. Boron doping significantly lowered the graphitization temperature, achieving higher graphitization degrees and better electrical conductivity at lower temperatures. The boric acid modification in this study is simple and efficient, and the resulting high-performance carbon felt meets the application requirements for gas diffusion layers (GDLs).</p>

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A facile approach for preparing B-doped carbon felt with superior conductivity and lower graphitization temperature

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • Qinsi Shao,
  • Hao Wang,
  • Xihai Wang,
  • Jin Tian,
  • Hengxin Zhang,
  • Ruicheng Bai,
  • Joey Chung-Yen Jung,
  • Hongshan Fu

摘要

In this study, polyacrylonitrile-based carbon felt (PANCF) was successfully prepared from polyacrylonitrile oxidized felt (PANOF) by sequential low-temperature pre-pressing, resin impregnation, hot pressing, and carbonization procedures. Subsequently, boron-doped modification of the carbon felt was carried out through boric acid solution impregnation and graphitization treatment. The effects of different concentrations of boric acid solution and graphitization temperatures on the morphology, structure, and performance of the carbon felt were investigated. The results showed that PANCF modified with 5 wt.% boric acid solution and graphitized at 2200 °C exhibited excellent electrical conductivity and graphitization degree. Boron doping significantly lowered the graphitization temperature, achieving higher graphitization degrees and better electrical conductivity at lower temperatures. The boric acid modification in this study is simple and efficient, and the resulting high-performance carbon felt meets the application requirements for gas diffusion layers (GDLs).