The temperature-dependent corrosion behaviour and through-plane conductivity of nano-thin carbon/titanium/stainless steel (C/Ti/SS316L) composite coatings in a DOE-specified simulated PEMFC cathode environment (0.1 ppm HF, pH 3) were investigated. Elevated temperatures accelerated mass transfer, reducing corrosion resistance via negative corrosion potential shifts, increased corrosion current density, and lower impedance modulus. Under 0.67 V polarisation, coatings maintained low corrosion current density (<0.5 μA cm−2) and ICR (<2 mΩ cm2) even at 90°C, meeting DOE targets. Conversely, polarisation at 1.43 V and high temperatures triggered preferential carbon corrosion, Ti interlayer exposure/dissolution, and Ti-oxide formation/dissolution, degrading through-plane conductivity. A temperature-dependent anodic dissolution transition is proposed: Ti-interlayer-controlled dissolution at moderate temperatures shifts to synergistic Ti dissolution and carbon corrosion at high temperatures. These findings define a safe operating temperature window for C/Ti-coated bipolar plates, supporting their practical PEMFC applications.
LinKLiXDongH, et al.Surface modification of 316 stainless steel with platinum for the application of bipolar plates in high performance proton exchange membrane fuel cells. Int J Hydrogen Energy2017; 42: 2338–2348.
2.
LimJWLeeDKimM, et al.Composite structures for proton exchange membrane fuel cells (PEMFC) and energy storage systems (ESS). Composite Structures2015; 134: 927–949.
3.
XiongKWuWWangS, et al.Modeling, design, materials and fabrication of bipolar plates for proton exchange membrane fuel cell: a review. Appl Energy2021; 301: 117443.
4.
XuZQiuDYiP, et al.Towards mass applications: a review on the challenges and developments in metallic bipolar plates for PEMFC. Prog Natural Sci Mater Intern2020; 30: 815–824.
5.
LuoXChangLRenC, et al.Sandwich-like functional design of C/(Ti:C)/Ti modified Ti bipolar plates for proton exchange membrane fuel cells. J Power Sources2023; 585: 233633.
6.
GaoXChenJXuR, et al.Research progress and prospect of the materials of bipolar plates for proton exchange membrane fuel cells (PEMFCs). Int J Hydrogen Energy2024; 50: 711–743.
7.
LowHCLimBHMasdarMS, et al.Understanding the factors influencing the corrosion of bipolar plate to the performance and durability of unitized regenerative proton exchange membrane fuel cell: a review. Int J Hydrogen Energy2024; 57: 420–430.
8.
ChenMDingJCKwonS-H, et al.Corrosion resistance and conductivity of NbN-coated 316L stainless steel bipolar plates for proton exchange membrane fuel cells. Corros Sci2022; 196: 110042.
9.
LengYMingPYangD, et al.Stainless steel bipolar plates for proton exchange membrane fuel cells: materials, flow channel design and forming processes. J Power Sources2020; 451: 227783.
10.
DeyabMAMeleG. Stainless steel bipolar plate coated with polyaniline/Zn-Porphyrin composites coatings for proton exchange membrane fuel cell. Sci Rep2020; 10: 3277.
11.
Mirzaee SisanMAbdolahi SereshkiMKhorsandH, et al.Carbon coating for corrosion protection of SS-316L and AA-6061 as bipolar plates of PEM fuel cells. J Alloys Compd2014; 613: 288–291.
12.
MoriYUedaMHashimotoM, et al.Amorphous carbon coated stainless separator for PEFCs. Surf Coat Technol2008; 202: 4094–4101.
13.
SunHCookeKEitzingerG, et al.Development of PVD coatings for PEMFC metallic bipolar plates. Thin Solid Films2013; 528: 199–204.
14.
SongYZhangCLingC-Y, et al.Review on current research of materials, fabrication and application for bipolar plate in proton exchange membrane fuel cell. Int J Hydrogen Energy2020; 45: 29832–29847.
15.
ParkY-CLeeS-HKimS-K, et al.Corrosion properties and cell performance of CrN/cr-coated stainless steel 316L as a metal bipolar plate for a direct methanol fuel cell [J]. Electrochim Acta2011; 56: 7602–7609.
16.
MüllerM-VGiorgioMHausmannP, et al.Investigation of the effect of carbon post- vs pre-coated metallic bipolar plates for PEMFCs – Start-up and shut-down. Int J Hydrogen Energy2022; 47: 8532–8548.
17.
CooperLEl-KharoufA. Titanium nitride polyaniline bilayer coating for metallic bipolar plates used in polymer electrolyte fuel cells. Fuel Cells2020; 20: 453–460.
18.
WangYNorthwoodDO. An investigation into the effects of a nano-thick gold interlayer on polypyrrole coatings on 316L stainless steel for the bipolar plates of PEM fuel cells. J Power Sources2008; 175: 40–48.
19.
WangSHouMZhaoQ, et al.Ti/(Ti,Cr)N/CrN multilayer coated 316L stainless steel by arc ion plating as bipolar plates for proton exchange membrane fuel cells . J Energy Chem2017; 26: 168–174.
20.
ShowY. Electrically conductive amorphous carbon coating on metal bipolar plates for PEFC. Surf Coat Technol2007; 202: 1252–1255.
21.
FanH-QZhuXWangZ-L, et al.High corrosion resistance and through-plane electrical conductivity of C/Ti and C/Cr coated metal bipolar plates used in PEMFC. Energy2024; 291: 130366.
22.
FanH-QWuY-MSuS, et al.Solution acidity and temperature induced anodic dissolution and degradation of through-plane electrical conductivity of Au/TiN coated metal bipolar plates used in PEMFC. Energy2022; 254: 124453.
23.
LædreSKongsteinOEOedegaardA, et al.The effect of pH and halides on the corrosion process of stainless steel bipolar plates for proton exchange membrane fuel cells. Int J Hydrogen Energy2012; 37: 18537–18546.
24.
YangYGuoLLiuH. The effect of temperature on corrosion behavior of SS316L in the cathode environment of proton exchange membrane fuel cells. J Power Sources2011; 196: 5503–5510.
25.
XuanJXuLBaiS, et al.Influence of temperature on corrosion behavior, wettability, and surface conductivity of 304 stainless steel in simulated cathode environment of proton exchange membrane fuel cells. Int J Hydrogen Energy2021; 46: 22920–22931.
26.
YiPZhangWBiF, et al.Enhanced corrosion resistance and interfacial conductivity of TiC x/aC nanolayered coatings via synergy of substrate bias voltage for bipolar plates applications in PEMFCs. ACS Appl Mater Interfaces2018; 10: 19087–19096.
27.
YiPLiXYaoL, et al.A lifetime prediction model for coated metallic bipolar plates in proton exchange membrane fuel cells [J]. Energy Convers Manage2019; 183: 65–72.
28.
HongY-YWangX-ZCadienK, et al.Transient potential induced anodic dissolution of 316L stainless steel in sulfuric acid solution. J Electrochem Soc2019; 166: C3355.
29.
YingYGuoLLiuH. The effect of temperature on corrosion behavior of SS316L in the cathode environment of proton exchange membrane fuel cells. J Power Sources2011; 196: 5503–5510.
30.
LvBXiaLYangY, et al.Synthesis of nanostructured TiC/TiO2 with controllable morphology on carbon fibers as photocatalyst for degrading RhB and reducing Cr(VI) under visible light. J Mater Sci2020; 55: 14953–14964.
31.
YanWZhangYChenL, et al.Corrosion behavior and interfacial conductivity of amorphous hydrogenated carbon and titanium carbide composite (a-C: h/TiC) films prepared on titanium bipolar plates in PEMFCs. Diamond Relat Mater2021; 120: 108628.
32.
LiHGuoPZhangD, et al.Interface-induced degradation of amorphous carbon films/stainless steel bipolar plates in proton exchange membrane fuel cells. J Power Sources2020; 469: 228269.
33.
JieJJinzhouZMengleiH, et al.Investigation of high potential corrosion protection with titanium carbonitride coating on 316L stainless steel bipolar plates. Corros Sci2021; 191: 109757.
34.
GuiYBlackwoodDJ. Electrochromic enhancement of WO3-TiO2 composite films produced by electrochemical anodization. J Electrochem Soc2014; 161: E191–E201.
35.
LavigneOAlemany-DumontCNormandB, et al.Cerium insertion in 316L passive film: effect on conductivity and corrosion resistance performances of metallic bipolar plates for PEM fuel cell application. Surf Coat Technol2010; 205: 1870–1877.
36.
LiWLiuL-TLiZ-X, et al.Corrosion and conductivity behavior of titanium-doped amorphous carbon film coated SS316L in the environment of PEMFCs. Mater Chem Phys2022; 276: 125234.
37.
BiFHouKYiP, et al.Mechanisms of growth, properties and degradation of amorphous carbon films by closed field unbalanced magnetron sputtering on stainless steel bipolar plates for PEMFCs. Appl Surf Sci2017; 422: 921–931.
38.
KhamdokhovAZTeshevRSKhamdokhovZM, et al.XPS study of TiN films formed by the electric arc technique. J Surface Investig X-ray, Syn Neutron Techn2015; 9: 710–714.
39.
LuoHSuHDongC, et al.Influence of pH on the passivation behaviour of 904L stainless steel bipolar plates for proton exchange membrane fuel cells. J Alloys Compd2016; 686: 216–226.
40.
LuFHChenHY. XPS Analyses of TiN films on Cu substrates after annealing in the controlled atmosphere. Thin Solid Films1999; 355–356: 374–379.
41.
ZhangDYiPPengL, et al.Amorphous carbon films doped with silver and chromium to achieve ultra-low interfacial electrical resistance and long-term durability in the application of proton exchange membrane fuel cells. Carbon N Y2019; 145: 333–344.
42.
ParkKAhnSKwonH. Effects of solution temperature on the kinetic nature of passive film on Ni. Electrochim Acta2011; 56: 1662–1669.
