Scholarlink

<p>Proton exchange membrane fuel cells are a promising sustainable energy technology, and the gas diffusion layer is a key component affecting the performance. This study focused on the preparation and performance optimization of titanium-based metal gas diffusion layers for proton exchange membrane fuel cells. Four titanium powder sizes were screened, with the − 325 + 500 mesh powder selected due to its balanced apparent density of 1.58&#xa0;g cm<sup>−3</sup>&#xa0;and flowability of 45&#xa0;s. The most favorable sintering condition identified in this study for this powder was determined as 1050&#xa0;°C for 1.5&#xa0;h, yielding a titanium-based metal gas diffusion layer with a tensile strength of 7.67&#xa0;MPa, average pore size of 35.06&#xa0;μm, and permeability of 2.94 × 10<sup>–12</sup> m<sup>2</sup>, comparable to commercial TGP-H-060 carbon paper but with better structural stability. A 0.15&#xa0;mm titanium-based gas diffusion layer exhibited superior gas permeability, with a Gurley time of 0.65&#xa0;s and 74.6% porosity, attributed to its straight-through pore structure. Magnetron sputtering of a carbon coating under parameters of 110&#xa0;A, 21&#xa0;min, 8 × 10<sup>−3</sup> Pa reduced contact resistance to 2.01 mΩ cm<sup>2</sup>, and enhanced corrosion resistance, with X-ray photoelectron spectroscopy and Raman analyses confirming a high sp<sup>2</sup> hybridization ratio of 69.92%. After hydrophobic treatment of 4–6 wt% polytetrafluoroethylene and microporous layer coating, the titanium-based metal gas diffusion layer showed superior hydrophobicity with average contact angles of 157.09 ° on the microporous layer side and 148.65 ° on the backside. The results indicated that the titanium-based metal gas diffusion layers improved mechanical strength, gas permeability, corrosion resistance and water management capabilities.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Research on titanium-based metal gas diffusion layers for proton exchange membrane fuel cells

  • 期刊论文

  • 发表日期：

    2026年1月14日

查看全文
  • Tiancai Ma,
  • Julong Zhou,
  • Huijin Guo,
  • Kang Shao,
  • Shubin Hou,
  • Kaiwen Feng,
  • Ruitao Li,
  • Ziheng Gu,
  • Naiyuan Yao,
  • Jianbin Su,
  • Lei Shi

摘要

Proton exchange membrane fuel cells are a promising sustainable energy technology, and the gas diffusion layer is a key component affecting the performance. This study focused on the preparation and performance optimization of titanium-based metal gas diffusion layers for proton exchange membrane fuel cells. Four titanium powder sizes were screened, with the − 325 + 500 mesh powder selected due to its balanced apparent density of 1.58 g cm−3 and flowability of 45 s. The most favorable sintering condition identified in this study for this powder was determined as 1050 °C for 1.5 h, yielding a titanium-based metal gas diffusion layer with a tensile strength of 7.67 MPa, average pore size of 35.06 μm, and permeability of 2.94 × 10–12 m2, comparable to commercial TGP-H-060 carbon paper but with better structural stability. A 0.15 mm titanium-based gas diffusion layer exhibited superior gas permeability, with a Gurley time of 0.65 s and 74.6% porosity, attributed to its straight-through pore structure. Magnetron sputtering of a carbon coating under parameters of 110 A, 21 min, 8 × 10−3 Pa reduced contact resistance to 2.01 mΩ cm2, and enhanced corrosion resistance, with X-ray photoelectron spectroscopy and Raman analyses confirming a high sp2 hybridization ratio of 69.92%. After hydrophobic treatment of 4–6 wt% polytetrafluoroethylene and microporous layer coating, the titanium-based metal gas diffusion layer showed superior hydrophobicity with average contact angles of 157.09 ° on the microporous layer side and 148.65 ° on the backside. The results indicated that the titanium-based metal gas diffusion layers improved mechanical strength, gas permeability, corrosion resistance and water management capabilities.

Graphical Abstract