Process and challenges of stainless steel based bipolar plates for proton exchange membrane fuel cells

Properties of NbC/а‐C:H films on titanium bipolar plates for proton exchange membrane fuel cells

“…Prior to film deposition, the substrate was pre-etched for 5 min to remove contaminations and get an active surface with the bias voltage and niobium target current set at -600 V and 70 A, respectively. Then the bias voltage on the substrate was increased to -200 V and five acetylene (C 2 H 2 ) flow rates (12,15,18,21, and 24 sccm) were introduced to get NbC/а-C:H films with different Nb/C ratios. The samples were named S1-S5, respectively.…”

“…In recent years, a variety of techniques have been developed for film design on metal bipolar plates. Physical vapor deposition technology has the advantages of simple process, low pollution, and can produce uniform and dense films with strong bonding force, making it the most commonly used coating technology [14][15][16]. Among all the developed film materials, carbon-based materials have drawn wide attention due to their excellent chemical stability, high conductivity, and low cost [14,17,18].…”

Current status of research on composite bipolar plates for proton exchange membrane fuel cells (PEMFCs): nanofillers and structure optimization

“…As one of the main structural materials of PEMFC, the performance and cost of bipolar plates have an important impact on the practicalization of PEMFC. As a class of potential bipolar plate materials, composite bipolar plates have the advantages that graphite bipolar plates and metal bipolar plates do not have, and compared with the lower corrosion resistance and durability of metal plates, 123 composite bipolar plates have better corrosion resistance and machinability, but at present, there are still problems such as difficulty in balancing the mechanical properties and electrical conductivity, high cost, and low overall performance. 124,125…”

Structure and Properties of Carboxylated Carbon Nanotubes@Expanded Graphite/Polyethersulfone Composite Bipolar Plates for PEM

“…Metal bipolar plates have excellent mechanical properties, processing properties, and electrical conductivity [ 17 , 18 , 19 , 20 , 21 ]. However, because of the poor corrosion resistance of metal BPs compared to graphite BPs, methods such as corrosion-resistant coatings are needed to overcome the degradation of fuel cell durability due to corrosion resistance [ 7 , 22 , 23 , 24 ]. Composite BPs are usually made using graphite and various resins such as polyimide, epoxy, and other polymers, and have good processability and corrosion resistance [ 13 , 25 , 26 , 27 ].…”