Model based evaluation of alkaline anion exchange membrane fuel cells with water management

Saebea, Dang; Chaiburi, Chakkrapong; Authayanun, Suthida

doi:10.1016/j.cej.2019.05.200

Cited by 42 publications

(18 citation statements)

References 26 publications

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“…Too much water causes electrode flooding and a high mass transfer resistance, while too little water causes electrode dry‐out and an increased ohmic loss. [ 29 ] The optimum cathodic relative humidity is higher than that of anodic one possibly in that water functions as the reactant of the cathode and is needed for hydroxide conduction from cathode to anode via electroosmotic drag mechanism (Figure S10, Supporting Information). [ 30 ] As shown in Figure 8c, the cell power density increases with the increase of anodic ionomer loading from 10 to 20 wt%, while decreases from 20 to 30 wt%.…”

Section: Resultsmentioning

confidence: 99%

Pt_0.25Ru_0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction

Chai

Zhao

et al. 2020

Adv Materials Inter

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A series of uniform 3.0–3.8 nm Pt1−xRux particles supported on nitrogen‐doped carbon (N‐C) is synthesized by wet‐impregnation, high‐temperature reduction, and high‐temperature NH3 etching. As far as it is known, the resultant Pt0.25Ru0.75/N‐C exhibits the highest activity toward alkaline hydrogen oxidation reaction (HOR) in terms of mass specific exchange current density (j0,m, 1654 A gPtRu−1), that is 4.7 and 1.4 times of commercial Pt/C (352 A gPt−1) and PtRu/C (1213 A gPtRu−1), respectively. The remarkable activity originates from a high electrochemical active surface area (ECSA), weakened hydrogen binding energy (HBE), and appropriate oxophilic property. Additionally, the Pt0.25Ru0.75/N‐C displays much improved durability during potential cycling with respect to commercial Pt/C and commercial PtRu/C, likely arising from the stabilizing effect of nitrogen dopant of N‐C on Pt0.25Ru0.75. Furthermore, the single cell fabricated with 0.08 mgPt cm−2 of the Pt0.25Ru0.75/N‐C as the anode reaches a peak power density of 831 mW cm−2, which is 1.8 and 1.1 times of that fabricated with 0.2 mgPt cm−2 of commercial Pt/C and 0.13 mgPt cm−2 of commercial PtRu/C as the anode, respectively. This study exhibits that low‐platinum alkaline HOR electrocatalyst should be a highly promising approach for hydroxide exchange membrane fuel cells (HEMFCs).

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Section: Resultsmentioning

confidence: 99%

Pt_0.25Ru_0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction

Chai

Zhao

et al. 2020

Adv Materials Inter

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“…In particular, anion exchange membrane fuel cells (AEMFCs) with an alkaline operating environment represent high reaction kinetics, lower fuel leakage, use of non-noble metal catalysts, and relatively high fuel cell performance. [1][2][3][4][5] In AEMFCs, facile hydroxide conduction and high stability of the anion exchange membrane (AEM) play a critical role in the performance of fuel cells. Therefore, enormous efforts have been directed towards the construction of high-performance hydroxide-conducting materials, including nanophase-separated polymers and organic-inorganic hybrids.…”

Section: Introductionmentioning

confidence: 99%

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Chen

Zhang

et al. 2022

J. Mater. Chem. A

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“…For the anode and cathode, asymmetric pressure and RH operations were proposed to facilitate water diffusion from the anode to the cathode. [ 26 ] Water vapor pressure at the cathode can be enhanced by unbalanced pressure operation, which reduces the ohmic loss and improves cell performance. On the other hand, the RH and backpressure in the anode need to be finely regulated.…”

Section: Overall Mea For Aemfcmentioning

confidence: 99%

Recent Insights on Catalyst Layers for Anion Exchange Membrane Fuel Cells

et al. 2021

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Anion exchange membrane fuel cells (AEMFCs) performance have significantly improved in the last decade (>1 W cm−2), and is now comparable with that of proton exchange membrane fuel cells (PEMFCs). At high current densities, issues in the catalyst layer (CL, composed of catalyst and ionomer), like oxygen transfer, water balance, and microstructural evolution, play important roles in the performance. In addition, CLs for AEMFCs have different requirements than for PEMFCs, such as chemical/physical stability, reaction mechanism, and mass transfer, because of different conductive media and pH environment. The anion exchange ionomer (AEI), which is the soluble or dispersed analogue of the anion exchange membrane (AEM), is required for hydroxide transport in the CL and is normally handled separately with the electrocatalyst during the electrode fabrication process. The importance of the AEI–catalyst interface in maximizing the utilization of electrocatalyst and fuel/oxygen transfer process must be carefully investigated. This review briefly covers new concepts in the complex AEMFC catalyst layer, before a detailed discussion on advances in CLs based on the design of AEIs and electrocatalysts. The importance of the structure–function relationship is highlighted with the aim of directing the further development of CLs for high‐performance AEMFC.

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Model based evaluation of alkaline anion exchange membrane fuel cells with water management

Cited by 42 publications

References 26 publications

Pt_0.25Ru_0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction

Pt_0.25Ru_0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Recent Insights on Catalyst Layers for Anion Exchange Membrane Fuel Cells

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Model based evaluation of alkaline anion exchange membrane fuel cells with water management

Cited by 42 publications

References 26 publications

Pt0.25Ru0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction

Pt0.25Ru0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Recent Insights on Catalyst Layers for Anion Exchange Membrane Fuel Cells

Contact Info

Product

Resources

About

Pt_0.25Ru_0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction

Pt_0.25Ru_0.75/N‐C as Highly Active and Durable Electrocatalysts toward Alkaline Hydrogen Oxidation Reaction