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<p>Solid oxide cells (SOCs) efficiently interconvert chemicals and electricity. However, they are primarily confined to 2D design and fabrication technologies. Planar SOC stacks require complex multi-material components, leading to reduced compactness and high specific weight. Here we escape the 2D paradigm and adopt a true 3D design based on triply periodic minimal surface structures, enabling superior performance on gravimetric and volumetric bases. Leveraging the resolution and accuracy of additive manufacturing, we demonstrate a monolithic, gyroidal SOC that eliminates the need for metallic interconnects and sealing components. The monolith achieves optimal spatial utilization, exceptional mass-specific indexes, a straightforward manufacturing procedure and high electrochemical and thermomechanical stability. The specific power and volumetric power density surpass 1 W g<sup>−1</sup> and 3 W cm<sup>−3</sup> in fuel cell mode, and the mass-index and volume-index hydrogen production rates are about 7 × 10<sup>−4</sup> Nm<sup>3</sup> h<sup>−1</sup> g<sup>−1</sup> and 2 × 10<sup>−3</sup> Nm<sup>3</sup> h<sup>−1</sup> cm<sup>−3</sup> in electrolysis mode, nearly an order of magnitude enhancement compared to planar stacks.</p>

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Monolithic gyroidal solid oxide cells by additive manufacturing

  • 期刊论文

  • 发表日期：

    2025年7月18日

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  • Zhipeng Zhou,
  • Aakil R. Lalwani,
  • Xiufu Sun,
  • Zhihao Pan,
  • Pouya Shahriary,
  • Yun Xie,
  • Yijing Shang,
  • Javier L. Navas,
  • Alberto Basso,
  • Naiqi Shang,
  • Marina Artemeva,
  • Peyman Khajavi,
  • Ming Chen,
  • Victor B. Tinti,
  • David B. Pedersen,
  • Venkata K. Nadimpalli,
  • Vincenzo Esposito

摘要

Solid oxide cells (SOCs) efficiently interconvert chemicals and electricity. However, they are primarily confined to 2D design and fabrication technologies. Planar SOC stacks require complex multi-material components, leading to reduced compactness and high specific weight. Here we escape the 2D paradigm and adopt a true 3D design based on triply periodic minimal surface structures, enabling superior performance on gravimetric and volumetric bases. Leveraging the resolution and accuracy of additive manufacturing, we demonstrate a monolithic, gyroidal SOC that eliminates the need for metallic interconnects and sealing components. The monolith achieves optimal spatial utilization, exceptional mass-specific indexes, a straightforward manufacturing procedure and high electrochemical and thermomechanical stability. The specific power and volumetric power density surpass 1 W g−1 and 3 W cm−3 in fuel cell mode, and the mass-index and volume-index hydrogen production rates are about 7 × 10−4 Nm3 h−1 g−1 and 2 × 10−3 Nm3 h−1 cm−3 in electrolysis mode, nearly an order of magnitude enhancement compared to planar stacks.