Graphene as corrosion protection for metal foam flow distributor in proton exchange membrane fuel cells

Lee, Yi Husan; Li, Shi Min; Tseng, Chung Jen; Su, Ching Yuan; Lin, Sheng Chun; Jhuang, Jhe Wei

doi:10.1016/j.ijhydene.2017.03.233

Cited by 31 publications

(9 citation statements)

References 24 publications

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“…Contact angle measurements gave an average internal angle of 25.1° for Nb 2 O 5 /PTSA, demonstrating that the treatment resulted in an increase in the hydrophobicity of the material. For the starting material (Nb 2 O 5 ) this angle was zero, which was expected, since most oxide surfaces are hydrophilic 46, 47.…”

Section: Resultsmentioning

confidence: 59%

Versatile Hybrid Niobium Pentoxide‐Based Catalyst Applied in Reactions of the Fuels Industry: Oleic Acid Esterification and Quinoline Oxidation

Sturt

Moura

2021

Chem Eng & Technol

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Hybrid niobium‐based catalysts were synthesized and applied in two kinds of reactions: oleic acid esterification to produce biodiesel and oxidation of quinoline, an important contaminant of fossil fuels. Niobium oxides were functionalized with p‐toluenesulfonic acid, which conferred amphiphilic properties on the materials and an increase in Brønsted acidic sites due to the incorporation of sulfo groups on the material surface. The oleic acid esterification reaction with methanol showed very high efficiency of the hybrid material with 90 % conversion, even after three reuse cycles, under very mild conditions. Moreover, the catalyst was capable of promoting quinoline oxidation in a biphasic reaction.

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Section: Resultsmentioning

confidence: 59%

Versatile Hybrid Niobium Pentoxide‐Based Catalyst Applied in Reactions of the Fuels Industry: Oleic Acid Esterification and Quinoline Oxidation

Sturt

Moura

2021

Chem Eng & Technol

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“…The aluminium flow-field was electroless coated in gold to prevent corrosion. Nickel foam was coated in graphene via chemical vapour deposition (CVD) for corrosion resistance [49], [50]. The uncompressed graphene-coated nickel foam (Six Carbon Technology, China) is 1.6 mm thick with a contact angle of 102° (manufacturer data).…”

Section: Experimental Setup 21 Fuel Cell Designmentioning

confidence: 99%

Characterization of water management in metal foam flow-field based polymer electrolyte fuel cells using in-operando neutron radiography

Cho

Whiteley

et al. 2020

International Journal of Hydrogen Energy

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Metal foam flow-fields have shown great potential in improving the uniformity of reactant distribution in polymer electrolyte fuel cells (PEFCs) by eliminating the 'land/channel' geometry of conventional designs. However, a detailed understanding of the water management in operational metal foam flow-field based PEFCs is limited. This study aims to provide the first clear evidence of how and where water is generated, accumulated and removed in the metal foam flow-field based PEFCs using in-operando neutron radiography, and correlate the water 'maps' with electrochemical performance and durability. Results show that the metal foam flow-field based PEFC has greater tolerance to dehydration at 1000 mA cm -2 , exhibiting a ~50% increase in voltage, ∼127% increase in total water mass and ~38% decrease in high frequency resistance (HFR) than serpentine flow-field design. Additionally, the metal foam flow-field promotes more uniform water distribution where the standard deviation of the liquid water thickness distribution across the entire cell active area is almost half that of the serpentine. These superior characteristics of metal foam flow-field result in greater than twice the maximum power density over serpentine flow-field. Optimizing fuel cell operating condition and foam microstructure would partly mitigate flooding in the metal foam flow-field based PEFC, which will form the basis of future work.

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“…Yi-Husan et al [95] investigated the corrosion resistance of uncoated metal foam as well as deposition of graphene on nickel open pore metal foam by chemical vapor deposition (CVD) techniques. Tafel analysis shows that graphene-coated substrate has a lower corrosion density than the uncoated substrate.…”

Section: Coating Of Open Porous Cellular Metal Foam Flow Channelmentioning

confidence: 99%

Evaluating the Effect of Metal Bipolar Plate Coating on the Performance of Proton Exchange Membrane Fuel Cells

et al. 2018

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Environmental concerns of greenhouse gases (GHG) effect from fossil commodities and the fast increase in global energy demand have created awareness on the need to replace fossil fuels with other sources of clean energy. PEM fuel cell (PEMFC) is a promising source of energy to replace fossil fuels. The commercialization of the cell depends on its price, weight and mechanical strength. Bipolar plates are among the main components of PEMFC which perform some significant functions in the fuel cell stack. Metal bipolar plate is considered by the research community as the future material for fuel cells. However, surface coating is required for metals to enhance its corrosion resistance, hydrophilicity and interfacial contact resistance (ICR) in PEM fuel cells. Open pore cellular metal foam (OPCMF) materials have been used to replace the conventional flow field channel in recent times due to its low electrical resistance, high specific area and high porosity; however, it endures the same corrosion problem as the metallic bipolar plate. This investigation offers an overview on different types of bipolar plates and techniques in coating metallic bipolar platse and open pore metal foam as flow field channel materials to improve the corrosion resistance which will eventually increase the efficiency of the fuel cell appreciably.

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Graphene as corrosion protection for metal foam flow distributor in proton exchange membrane fuel cells

Cited by 31 publications

References 24 publications

Versatile Hybrid Niobium Pentoxide‐Based Catalyst Applied in Reactions of the Fuels Industry: Oleic Acid Esterification and Quinoline Oxidation

Versatile Hybrid Niobium Pentoxide‐Based Catalyst Applied in Reactions of the Fuels Industry: Oleic Acid Esterification and Quinoline Oxidation

Characterization of water management in metal foam flow-field based polymer electrolyte fuel cells using in-operando neutron radiography

Evaluating the Effect of Metal Bipolar Plate Coating on the Performance of Proton Exchange Membrane Fuel Cells

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