Investigation of Porous Metal-Based 3D-Printed Anode GDLs for Tubular High Temperature Proton Exchange Membrane Fuel Cells
Investigation of Porous Metal-Based 3D-Printed Anode GDLs for Tubular High Temperature Proton Exchange Membrane Fuel Cells
复制标题
DOI：
10.3390/ma13092096
复制
发表时间：
2020-05-01
期刊：
影响因子：
3.4
通讯作者：
Abele, Eberhard
中科院分区：
文献类型：
--
作者：
Agudelo, Maria Catalina Bermudez;Hampe, Manfred;Abele, Eberhard
高温质子交换膜燃料电池（HT-PEMFC）通常使用具有碳基基底作为气体扩散层（GDL）材料的平面设计。然而，基于金属的衬底允许替代设计。在这项研究中，多孔薄壁管状元件制成的316 L不锈钢作为阳极GDL在多层管式高温质子交换膜燃料电池的适用性进行了研究。阳极GDL通过粉末床熔融使用激光束（PBF-LB）工艺制造，具有限定的孔隙率（14%和16%）。使用扫描电子显微镜（SEM）显微照片比较多孔元件的形态。孔隙率对燃料电池性能的影响通过电化学表征和短期稳定性测试（45小时）在商业测试站在160摄氏度和环境压力下运行，使用氢气作为燃料和空气作为氧化剂进行评估。结果表明，在孔隙率为16%的阳极GDL上制备的燃料电池具有较高的性能，在125.52 A/m2下运行5 h后的峰值功率密度为329.25 W/m2，在稳定性测试期间的电压退化速率为0.511 mV/h。此外，这项工作表明，增材制造可能是进一步开发燃料电池的有用工具。
A high-temperature proton exchange membrane fuel cell (HT-PEMFC) conventionally uses a planar design with carbon-based substrates as the gas diffusion layer (GDL) materials. However, the metal-based substrates allow for alternative designs. In this study, the applicability of porous thin-walled tubular elements made of 316L stainless steel as the anode GDL in a multi-layer tubular HT-PEMFC was investigated. The anode GDLs were fabricated via powder bed fusion using a laser beam (PBF-LB) process with defined porosities (14% and 16%). The morphology of the porous elements was compared using scanning electron microscopy (SEM) micrographs. The influence of the porosity on the fuel cell performance was evaluated through electrochemical characterization and a short-term stability test (45 h) in a commercial test station operated at 160 degrees C and ambient pressure, using hydrogen as the fuel and air as the oxidant. The results showed that the fuel cell manufactured upon the anode GDL with a porosity of 16% had a higher performance with a peak power density of 329.25 W/m(2) after 5 h of operation at 125.52 A/m(2) and a voltage degradation rate of 0.511 mV/h over the stability test period. Moreover, this work indicates that additive manufacturing could be a useful tool for further fuel cell development.