Anti-corrosion and conductivity of titanium diboride coating on metallic bipolar plates

He, Rong-Bu; Jiang, Jungan; Wang, Ruofan; Yue, Yuan; Chen, Y.; Pan, T.J.

doi:10.1016/j.corsci.2020.108646

Cited by 51 publications

(13 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highest R ct of Ti–STN meant the least charge transfer from the Ti surface to the corrosive electrolyte attributed to the compact coating blocking the electrolyte diffusion. The n close to 1.00 also showed Ti–STN had a smooth surface with few cracks …”

Section: Resultsmentioning

confidence: 72%

“…The n close to 1.00 also showed Ti−STN had a smooth surface with few cracks. 46 Furthermore, we analyzed these Ti−STN, Ti−Sn, Ti−Ti, Ti−Nb, and Ti foil substrates for potentiostatic measurements at 3.3 V vs RHE (potential at 200 mA cm −2 derived from the chronopotentiometric curve testing in Figure 6d) for 16 h as the destructive testing. As shown in Figure S18, the current density of the bare Ti foil was observed to rapidly increase at the testing start, signifying that heavy pitting corrosion occurred.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

High Corrosion Resistance of a Ti-Based Anode with Sn/Ti/Nb Ternary Metal Oxide Interlayers

Wei

Liu

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Ti-based anodes are widely applied in water splitting, the chlor-alkali industry, hydrometallurgy, and organic compound electrochemical synthesis. However, the thickening passivation layer in Ti substrates in acidic electrolytes accelerates the deactivation of whole Ti-based anodes. In order to block the attack from the reactive oxygen species, a compact interlayer containing ternary metal oxides (SnO2, TiO2, and Nb2O5, STN) on Ti foil (denoted as Ti–STN) was prepared via a facile thermal-decomposition method. The SnO2, TiO2, and Nb2O5 components impose the mutual restriction of grain growth during the pyrolytic synthetic progress, which promotes the grain refinement of STN interlayers. Due to the compact and stable STN interlayers, the Ti–STN substrate and the Ti–STN-derived active anodes presented an enhanced corrosion resistance and prolonged service lives. Hence, we believe that the Ti–STN substrate and the grain-refinement method to resist electrochemical corrosion in this work offer new approaches for the development of industrial electrolysis and electrochemical energy conversion devices.

show abstract

Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

High Corrosion Resistance of a Ti-Based Anode with Sn/Ti/Nb Ternary Metal Oxide Interlayers

Wei

Liu

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…In general, CPE is used to describe the capacitance, when the underlying electrochemical process is not described by a single relaxation frequency but by dispersion of relaxation frequencies (indicated by a flattened semicircle). It is specified by the (Y 0 ) and the power index number (n) as provided in (Equation (14)); where Y 0 is directly related to the active surface corrosion and electrical conductivity [ 71 ] and n is CPE power, which is attributed to the dispersion effects caused most probably by the roughness of the TFSOC surface [ 72 ]. Therefore, the identity and impedance of CPE are related to Equations (14) and (15), respectively.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical and Structural Property of TiSiNb TFSOC on Affordable Interconnects in Proton Exchange Membrane Fuel Cell Applications

Vallant

Ladenstein

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

High cost and low electrochemical stability of the interconnection in Proton Exchange Membrane Fuel Cell (PEMFC) in the presence of H2SO4 are one of the main issues hindering the commercialization of these devices. This manuscript presents the utilization of cost-effective steel in an attempt to minimize the PEMFC interconnection costs with a thin-film solid oxide coating (TFSOC) providing sufficient corrosion resistance for efficient long-term operation. Novel Ti0.50-y/2Si0.50-y/2Nby1,2O2 as TFSOC was deposited on the C45E steel as a metal interconnect utilizing a sol–gel process at various annealing temperatures. The analysis of the phase and surface morphology demonstrates that lower annealing temperatures developed nanometric crystallite size of 68 nm, more uniform structure and higher corrosion resistance. Under standard test conditions, the TFSOC demonstrated high polarization resistance (1.3 kΩ cm2) even after 720 hours (h). Electrical conductivity of the TFSOC as low as 1.4 × 10−2 (Ω m)−1 and activation energy of 0.20 eV were achieved, which helps to maintain the PEMFC output power.

show abstract

“…For PEMFCs, there are numerous reviews on the current research of materials for BPPs [ 20 , 21 , 22 , 23 ]. Thus, several studies reported the use of both austenitic [ 24 , 25 , 26 , 27 , 28 , 29 ] and ferritic stainless steels [ 30 , 31 , 32 , 33 , 34 ] as a support material for BPPs, with or without protective films, but in PEMFCs they operate in less aggressive conditions than in PEMWEs. The corrosion resistance of austenitic steels can be additionally improved by laser heat treatments [ 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of AISI 442 and AISI 446 Ferritic Stainless Steels as a Support for PEMWE Bipolar Plates

et al. 2023

View full text Add to dashboard Cite

Cost reduction in bipolar plates in proton exchange membrane water electrolyzers has previously been attempted by substituting bulk titanium with austenitic stainless steels protected with highly conductive and corrosion-resistant coatings. However, austenitic steels are more expensive than ferritic steels due to their high nickel content. Herein we report on the corrosion resistance of two high chromium ferritic stainless steels, AISI 442 and AISI 446, as an alternative material to manufacture bipolar plates. Electrochemical corrosion tests have shown that AISI 442 and AISI 446 have similar corrosion resistance, while AISI 446 reveals more noble corrosion potential and performs better during potentiostatic stress tests. The current density obtained during polarization at 2 V versus the standard hydrogen electrode (SHE) is 3.3 mA cm−2, which is more than two times lower than on AISI 442. Additionally, surface morphology characterization demonstrates that in contrast to AISI 442, AISI 446 is not sensitive to intercrystalline or pitting corrosion. Moreover, EDX energy dispersion analysis of AISI 446 reveals no differences in the chemical composition of the surface layer compared to the base material, as a confirmation of its high corrosion resistance. The results of this work open up the perspective of replacing austenitic stainless steels with less expensive ferritic stainless steels for the production of components such as bipolar plates in proton exchange membrane water electrolyzers.

show abstract

Anti-corrosion and conductivity of titanium diboride coating on metallic bipolar plates

Cited by 51 publications

References 37 publications

High Corrosion Resistance of a Ti-Based Anode with Sn/Ti/Nb Ternary Metal Oxide Interlayers

High Corrosion Resistance of a Ti-Based Anode with Sn/Ti/Nb Ternary Metal Oxide Interlayers

Electrochemical and Structural Property of TiSiNb TFSOC on Affordable Interconnects in Proton Exchange Membrane Fuel Cell Applications

Corrosion Resistance of AISI 442 and AISI 446 Ferritic Stainless Steels as a Support for PEMWE Bipolar Plates

Contact Info

Product

Resources

About