Corrosion and conductivity behavior of titanium-doped amorphous carbon film coated SS316L in the environment of PEMFCs

Li, Wei; Liu, Lintao; Li, Zhengxian; Wang, Yanfeng; Li, Hongzhan; Lei, Jiajun

doi:10.1016/j.matchemphys.2021.125234

Cited by 13 publications

(7 citation statements)

References 40 publications

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“…Figure 2 shows the XPS spectra of the deposited Ti, Cr co-doped amorphous carbon films with different Ti target currents. Figure 2 a shows that the peak of C 1s was deconvoluted into three or four main components at ~282.3 eV, ~282.8 eV, ~284.2 eV, ~285.1 eV, and ~288.2 eV, which indicated the existence of Ti-C, Cr-C, sp 2 , sp 3 , and C=O peaks, respectively [ 26 , 27 , 28 ]. There were four σ bonds in the case of the sp 3 -hybridized carbon, which were beneficial to the anti-corrosion properties and the mechanical properties of the amorphous carbon film.…”

Section: Resultsmentioning

confidence: 99%

“…The Ti-C bond, which, according to the peaks at ~454.7 eV and ~455.5 eV, separately suggested that when Ti was doped into the amorphous carbon film, TiC formed in the film, and there were no simple atomic titanium or Ti clusters in the film [ 29 , 30 ]. The peak at 455.5 eV here was related to the carbon-rich carbon phase Ti-C [ 26 , 31 ]. Figure 2 a reveals that the Ti-C phase’s peak area increased, which indicates that the contents of the Ti-C phase of the prepared thin films improved gradually with the increase in the Ti target current.…”

Section: Resultsmentioning

confidence: 99%

“…A further increase in the Ti content would change the density of the amorphous carbon coating, thus reducing the corrosion resistance. In addition, the appearance of the TiC crystal phase also increases the corrosion resistance of the coating after Ti doping because the TiC phase in amorphous carbon often exists as a corrosion-resistant phase [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

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Improvement in Corrosion Resistance and Interfacial Contact Resistance Properties of 316L Stainless Steel by Coating with Cr, Ti Co-Doped Amorphous Carbon Films in the Environment of the PEMFCs

Wang

et al. 2023

Molecules

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In order to obtain films with high corrosion resistance and excellent interfacial contact resistance (ICR) on 316L stainless steel used for bipolar plates in proton-exchange membrane fuel cells (PEMFCs), Cr, Ti co-doped amorphous carbon films were prepared on 316L stainless steel. The preparation method for the coating was magnetron sputtering. The doping amount of the Ti element was controlled by a Cr target and a Ti target current. The change in the structure and properties of the coating after the change from Cr single-element doping to Cr and Ti co-doping was studied. The change rule of the structure and properties of the coating from Cr single-element doping to Cr and Ti co-doping was studied. An increase in the Ti content led to a decreased grain boundary, a flatter surface, and a higher sp2-hybridized carbon content. TiC and CrC nanocrystals were formed in the amorphous carbon structure together. The amorphous carbon films doped with Cr and Ti simultaneously achieved a low ICR and high corrosion resistance compared with single-Cr-doped amorphous carbon. The enhanced corrosion resistance was attributed to the decreasing grain boundary, the formation of the TiC crystal structure, and the smaller grain size. The best performance was obtained at a Ti target current of 2A. Compared with bare 316L stainless steel, the corrosion resistance of Cr, Ti co-doped amorphous carbon (Icorr = 5.7 × 10−8 A/cm2, Ti-2 sample) was greatly improved. Because Ti doping increased the content of sp2-hybridized carbon in the coating, the contact resistance of the coating decreased. Moreover, the interfacial contact resistance was 3.1 mΩ·cm2 in the Ti-2 sample, much lower than that of bare 316L stainless steel. After the potentiostatic polarization test, the coating still had excellent conductivity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Improvement in Corrosion Resistance and Interfacial Contact Resistance Properties of 316L Stainless Steel by Coating with Cr, Ti Co-Doped Amorphous Carbon Films in the Environment of the PEMFCs

Wang

et al. 2023

Molecules

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“…Ren et al set a benchmark for the performance and degradation characteristics of SS316L in PEMFC cathode environment by exposing it to a more extreme end of potential range to better understand the corrosion behavior [28]. Li et al studied the protection method on SS316L by depositing amorphous carbon doped with Ti, which brought the corrosion current density (i corr ) down to 0.92 µA cm 2 and internal contact resistance (ICR) down to 3.43 mΩ cm 2 [29].…”

Section: Proton Exchange Membrane Fuel Cellmentioning

confidence: 99%

“…Leng et al suggested that SS316L is currently the most economical and technically viable choice as metallic BPPs [45]. The dependence of metallic BPPs toward coating justifies the economic feasibility of polymer composite materials as PEMFC BPPs [29,50].…”

Section: Proton Exchange Membrane Fuel Cellmentioning

confidence: 99%

Bipolar Plate Design Assessment: Proton Exchange Membrane Fuel Cell and Water Electrolyzer

Sarjuni,

Shahril,

Low

et al. 2024

Fuel Cells

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Proton exchange membrane fuel cells (PEMFCs) as power generators and proton exchange membrane water electrolyzers (PEMWEs) as hydrogen fuel producers play critical roles in implementing hydrogen energy. The bipolar plates (BPPs) in both PEMFC and PEMWE facilitate the distribution of reactants and products, providing electrical connectivity in a series of singular cells. Although both systems are categorized under the same PEM spectrum, the differing reaction mechanisms require specialized plate properties to achieve optimum performance. This short review analyzes the characteristics of BPPs in both PEMFC and PEMWE, with a focus on the plate material, coating, and flow field. This short review concluded that the polymer composite graphite–based BPPs are the most feasible for PEMFC with no coating needed. PEMWE needs SS316 as a BPP material with a conductive coating to withstand the highly corrosive oxygen evolution reaction at the anode. The serpentine flow field showed dominance in PEMFC stack performance due to even fluid distribution and efficient liquid water drainage. However, its high‐pressure drop contributes to greater parasitic power. PEMWEs commonly adopt the parallel flow field for its lower contact resistance and bubble formation for efficient mass transport toward the cathode.

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Comparative study on the structural make-up and mechanical behavior of silicon and silver doped amorphous carbon films

Patnaik

Maity

Kumar

2022

Silicon

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Corrosion and conductivity behavior of titanium-doped amorphous carbon film coated SS316L in the environment of PEMFCs

Cited by 13 publications

References 40 publications

Improvement in Corrosion Resistance and Interfacial Contact Resistance Properties of 316L Stainless Steel by Coating with Cr, Ti Co-Doped Amorphous Carbon Films in the Environment of the PEMFCs

Improvement in Corrosion Resistance and Interfacial Contact Resistance Properties of 316L Stainless Steel by Coating with Cr, Ti Co-Doped Amorphous Carbon Films in the Environment of the PEMFCs

Bipolar Plate Design Assessment: Proton Exchange Membrane Fuel Cell and Water Electrolyzer

Comparative study on the structural make-up and mechanical behavior of silicon and silver doped amorphous carbon films

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