原文信息：

Expanded graphite (EG)/Ni@Melamine foam (MF)/EG sandwich-structured flexible bipolar plate with excellent electrical conductivity, mechanical properties, and gas permeability

原文链接：https://doi.org/10.1016/j.apenergy.2023.120929IF: 11.446 Q1

在这项工作中，作者提出了一种将膨胀石墨（EG）与镀镍三聚氰胺泡沫（Ni@MF）层压与真空浸渍制备相结合的制备策略，制备了具有膨胀石墨（EG）/镀镍三聚氰胺泡沫（Ni@MF）夹层结构的复合双极板。光滑的三聚氰胺泡沫表面完全覆盖了镍元素，提供了丰富的导电通路，电导率达到了320 S/cm，面积比电阻为9 mΩ·cm2。而多孔的三聚氰胺泡沫（MF）为浸渍环氧树脂提供了足够的空间，抗弯曲强度达到56 MPa。中间层的富集树脂量也保证了较低的透气性(2.16×10-9 cm3cm-2s-1)。此外，经过表面处理的复合板表面也具有较好的疏水性能，达到90.2°。进一步的实际性能试验证明，与商业化的碳化石墨板相比，所研制的板在实际工况下具有良好的性能。该复合双极板将新型结构的创新和制备技术的结合也是燃料电池复合双极板获得高电导率，高机械性能和低气体渗透性的关键。

Fig. 1. (a) Schematic diagram for the syntheses of Ni@MF; (b) preparation process of EG/Ni@MF/EG-EP composite bipolar plate.

Fig. 2. (a) EC and ER of EG, EG-EP, and EG/Ni@MF/EG-EP plates; (b) Comparison of the EC of the m-EG/Ni@MF/EG-EP plate in this work with other reported work; (c) ASR of EG, EG-EP, and EG/Ni@MF/EG-EP plates; (d) ICR of EG, EG-EP, and m-EG/Ni@MF/EG-EP plates.

Fig. 3. (a) The maximum resin content that can be immersed in the plates; (b) flexural strength of the plates; (c) comparison of actual bending fatigue tests between EG and EG/Ni@MF/EG-EP plates; (d) mechanical behavior of the developed plate in this work with other reported work; (e) stress condition comparison of the EG/Ni@MF/EG-EP composite plate and EG-EP plate obtained by FEM simulation.

Fig. 4. (a) Schematic of the designed demo system of a single fuel cell; (b) comparison of the current change with time between the EG/Ni@MF/EG plate and CGP; (c) comparison of the current change with time between the EG/Ni@MF/EG plate and CGP under external shaking.