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<p>Direct methanol fuel cell (DMFC) is a potential new energy option with high energy density and storage convenience. In this work, a novel platinum-coated titanium fiber felt (Pt/TFF) cathode current collector is designed, and its performance enhancement mechanism is investigated through a combination of theoretical analysis and experimental tests. It is shown that the Pt coating significantly increased the catalytic active area while enhancing the current collector’s hydrophobicity and effectively reducing water retention. Electrochemical experiments showed that the structure increased the optimal methanol concentration of DMFC from 1 to 2 mol/L, the maximum power density from 38.84 to 53.96 mW/cm<sup>2</sup>, and the constant current discharge time from 80 to 107&#xa0;min. Electrochemical impedance spectroscopy (EIS) analysis further confirmed that the structure reduced ohmic impedance, charge transfer impedance, and mass transfer impedance and significantly improved the reaction efficiency and stability of the cell.</p>

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Platinum-titanium fiber felt for the cathode current collector of direct methanol fuel cells

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Zhengang Zhao,
  • Shaojie Wei,
  • Mengyao Zhou,
  • Bo Yang

摘要

Direct methanol fuel cell (DMFC) is a potential new energy option with high energy density and storage convenience. In this work, a novel platinum-coated titanium fiber felt (Pt/TFF) cathode current collector is designed, and its performance enhancement mechanism is investigated through a combination of theoretical analysis and experimental tests. It is shown that the Pt coating significantly increased the catalytic active area while enhancing the current collector’s hydrophobicity and effectively reducing water retention. Electrochemical experiments showed that the structure increased the optimal methanol concentration of DMFC from 1 to 2 mol/L, the maximum power density from 38.84 to 53.96 mW/cm2, and the constant current discharge time from 80 to 107 min. Electrochemical impedance spectroscopy (EIS) analysis further confirmed that the structure reduced ohmic impedance, charge transfer impedance, and mass transfer impedance and significantly improved the reaction efficiency and stability of the cell.