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<p>Protonic ceramic fuel cells (PCFCs) have emerged as highly promising candidates for efficient energy conversion. In particular, the anode microstructure plays a decisive role in governing gas transport and electrochemical kinetics, thereby dictating device performance. In this study, we systematically investigate the influence of anode porosity by introducing varying amounts (0–10 wt%) of polymethyl methacrylate (PMMA) as a pore-forming additive into the anode support layer. Electrochemical measurements reveal that enhanced porosity markedly lowers resistances, resulting in significant performance gains. Notably, the peak power density at 650&#xa0;°C rises from 1.12&#xa0;W cm<sup>− 2</sup> without PMMA to 1.83&#xa0;W cm<sup>− 2</sup> at 10 wt% PMMA, corresponding to a 63% improvement. These results underscore the critical importance of rational porosity engineering in optimizing anode processes and provide practical insight for high-performance PCFCs.</p>

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Porosity-engineered anode supports for high-performance protonic ceramic fuel cells

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月19日

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  • Ha-Ni Im,
  • Dongyeon Kim,
  • Taehee Lee,
  • Hansu Chang,
  • Sun-Ju Song,
  • Kang Taek Lee

摘要

Protonic ceramic fuel cells (PCFCs) have emerged as highly promising candidates for efficient energy conversion. In particular, the anode microstructure plays a decisive role in governing gas transport and electrochemical kinetics, thereby dictating device performance. In this study, we systematically investigate the influence of anode porosity by introducing varying amounts (0–10 wt%) of polymethyl methacrylate (PMMA) as a pore-forming additive into the anode support layer. Electrochemical measurements reveal that enhanced porosity markedly lowers resistances, resulting in significant performance gains. Notably, the peak power density at 650 °C rises from 1.12 W cm− 2 without PMMA to 1.83 W cm− 2 at 10 wt% PMMA, corresponding to a 63% improvement. These results underscore the critical importance of rational porosity engineering in optimizing anode processes and provide practical insight for high-performance PCFCs.