Fuel Cell Technical Team Roadmap

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doi:10.2172/1220127

Cited by 15 publications

(13 citation statements)

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“…To ensure that the cell's sensitivity is evaluated in the three main operating regimes: kinetics, ohmic and transport limited, the model is simulated at potentio-static conditions and output variables are evaluated at three potentials: 0.8, 0.67, and Journal of The Electrochemical Society, 2021 168 074501 0.3 V. These potentials are also consistent with Department of Energy's benchmarking conditions for low-temperature fuel cells. 47 Overall, 21 (7 × 3) output variables are evaluated for sensitivity analysis of the model.…”

Section: Methodsmentioning

confidence: 99%

Critical Parameter Identification of Fuel-Cell Models Using Sensitivity Analysis

Pant¹,

Stewart²,

Craig³

et al. 2021

J. Electrochem. Soc.

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Numerical modeling has been a vital tool in proton-exchange-membrane fuel-cell (PEMFC) analysis; however, the predictive capabilities of these models depend on the input physical parameters, several of which are either not experimentally measured or have large scatter in measured values. This article presents an uncertainty propagation-based sensitivity analysis to identify the model parameters that impact the model predictions most. A comprehensive 2-D membrane electrode assembly (MEA) model is used to perform local sensitivity analysis at multiple operating conditions, which encompass the range of environments and operating conditions a cell can encounter. While at lower humidities, cathode kinetics and membrane-ohmic-loss related parameters are crucial, gas transport and porous-media saturation behavior are more important at humidified conditions. Several of these findings are different from previous studies presented in literature. Identifying the crucial parameters helps focus future material and cell optimization studies as well as experimental studies to quantify these parameters with higher accuracy.

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Section: Methodsmentioning

confidence: 99%

Critical Parameter Identification of Fuel-Cell Models Using Sensitivity Analysis

Pant¹,

Stewart²,

Craig³

et al. 2021

J. Electrochem. Soc.

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“…The HOR in alkaline media has gathered significant attention as the reaction is less facile in alkaline than acidic environments and that AEMFCs have larger anode overpotentials than PEMFCs. In fact, compared to very acidic electrolytes, the exchange current density on Pt is more than two orders of magnitude lower (Shinichi, 2013). However, because of this aspect, researchers have exaggerated the HOR's significance to the overall behavior of the AEMFC.…”

Section: Electrocatalyst For Hydrogen Oxidation Reaction (Hor)mentioning

confidence: 99%

Anion exchange membrane fuel cell: New insights and advancements

Vedarajan

Balaji

Ramya

2022

WIREs Energy & Environment

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Anion exchange membrane (AEM)‐based fuel cells as an alternative to proton exchange membrane fuel cells (PEMFCs) are attracting a lot of attention due to lower cost perceived due to use of non‐platinum group metals as the catalysts. This review has focused on the advancements in the materials that have led to achievements in performances similar to that of PEMFC and the challenges that need to be overcome to bring the technology to commercialization. The improvements in the properties of the AEM, the advancements in the AEM, binders and understandings of the cationic species adsorption on the catalysts have led to improved performances >3 W cm−2. The review also highlights the importance of the stability issues of the membranes that has to be overcome for >5000 h of continuous operation for commercialization of the alkaline AEM fuel cell technology. The advancements in other operational parameters like water management, carbonation are also highlighted. This article is categorized under: Emerging Technologies > Hydrogen and Fuel Cells

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“…The support stability was evaluated using an accelerated stress test (AST) consisting of simulated start-up/shut-down cycling as reported previously. [44] This experiment was performed by cycling between 1.0 and 1.5 V for 30,000 cycles with 500 mV s À 1 scan rate at a cell temperature of 80 °C. [44] During the experiment, pure hydrogen (0.2 L min À 1 ) and nitrogen (0.05 L min À 1 ) having 100 % RH were supplied to the anode and cathode compartments, respectively.…”

Section: Fuel Cell Performance and Accelerated Stress Test (Ast) Studymentioning

confidence: 99%

“…[44] This experiment was performed by cycling between 1.0 and 1.5 V for 30,000 cycles with 500 mV s À 1 scan rate at a cell temperature of 80 °C. [44] During the experiment, pure hydrogen (0.2 L min À 1 ) and nitrogen (0.05 L min À 1 ) having 100 % RH were supplied to the anode and cathode compartments, respectively. The ECSA loss was recorded by CV every 5000 cycles.…”

Section: Fuel Cell Performance and Accelerated Stress Test (Ast) Studymentioning

confidence: 99%

Improved Durability and Activity in Pt/Mo₂C Fuel Cell Cathodes by Magnetron Sputtering of Tantalum

Hamo

Rosen

2021

ChemElectroChem

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Cost reduction together with durability represent the primary challenges for cathode catalysts in polymer electrolyte membrane fuel cells (PEMFCs). The catalyst is often supported by carbon, which suffers from parasitic corrosion, particularly during start‐up and shut‐down operations. Transition metal carbides (TMCs) have attracted attention as a potential replacement for carbon supports because some of them have electronic structures likened to noble metals. Mo2C has shown promising activity as platinum support for the oxygen reduction reaction (ORR) but can suffer from oxidation and dissolution. Here, Mo2C supports are modified by surface tantalum (Ta) treatment using a variety of DC magnetron sputtering operating parameters. All supports modified by Ta showed improved corrosion resistance compared to the untreated support. Pt/Mo2C modified with Ta using a 500 V bias, 6 mTorr working pressure, and 2 min sputter time additionally showed improved kinetic current density and mass activity. Ta sputtering under these conditions were applied to the cathode side of a Pt/Mo2C membrane electrode assembly and showed significantly improved durability when subjected to an accelerated stress test. Ta‐modified Pt/Mo2C cathodes showed resistance to void formation and loss of electrochemical surface area. Ta magnetron sputtering can therefore be considered a viable surface treatment for improving the activity and stability of PEMFCs using Mo2C‐based supports.

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Fuel Cell Technical Team Roadmap

Cited by 15 publications

References 0 publications

Critical Parameter Identification of Fuel-Cell Models Using Sensitivity Analysis

Critical Parameter Identification of Fuel-Cell Models Using Sensitivity Analysis

Anion exchange membrane fuel cell: New insights and advancements

Improved Durability and Activity in Pt/Mo₂C Fuel Cell Cathodes by Magnetron Sputtering of Tantalum

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Fuel Cell Technical Team Roadmap

Cited by 15 publications

References 0 publications

Critical Parameter Identification of Fuel-Cell Models Using Sensitivity Analysis

Critical Parameter Identification of Fuel-Cell Models Using Sensitivity Analysis

Anion exchange membrane fuel cell: New insights and advancements

Improved Durability and Activity in Pt/Mo2C Fuel Cell Cathodes by Magnetron Sputtering of Tantalum

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Product

Resources

About

Improved Durability and Activity in Pt/Mo₂C Fuel Cell Cathodes by Magnetron Sputtering of Tantalum