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
原文鏈接：https://doi.org/10.1016/j.apenergy.2023.120929IF: 11.446 Q1
在這項(xiàng)工作中，作者提出了一種將膨脹石墨（EG）與鍍鎳三聚氰胺泡沫（Ni@MF）層壓與真空浸漬制備相結(jié)合的制備策略，制備了具有膨脹石墨（EG）/鍍鎳三聚氰胺泡沫（Ni@MF）夾層結(jié)構(gòu)的復(fù)合雙極板。光滑的三聚氰胺泡沫表面完全覆蓋了鎳元素，提供了豐富的導(dǎo)電通路，電導(dǎo)率達(dá)到了320 S/cm，面積比電阻為9 mΩ·cm2。而多孔的三聚氰胺泡沫（MF）為浸漬環(huán)氧樹脂提供了足夠的空間，抗彎曲強(qiáng)度達(dá)到56 MPa。中間層的富集樹脂量也保證了較低的透氣性(2.16×10-9 cm3cm-2s-1)。此外，經(jīng)過表面處理的復(fù)合板表面也具有較好的疏水性能，達(dá)到90.2°。進(jìn)一步的實(shí)際性能試驗(yàn)證明，與商業(yè)化的碳化石墨板相比，所研制的板在實(shí)際工況下具有良好的性能。該復(fù)合雙極板將新型結(jié)構(gòu)的創(chuàng)新和制備技術(shù)的結(jié)合也是燃料電池復(fù)合雙極板獲得高電導(dǎo)率，高機(jī)械性能和低氣體滲透性的關(guān)鍵。
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.