Self-humidified operation of a PEM fuel cell using a novel silica composite coating method

Angayarkanni, R.; Ganesan, Aristatil; Dhelipan, M.; Karthikeyan, S.; Mani, N.; Thiyagarajan, P.

doi:10.1016/j.ijhydene.2021.11.103

Cited by 16 publications

(8 citation statements)

References 30 publications

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“…Different works regarding the effects of SiO 2 addition to the anode and/or cathode CL on the cell performances were carried out. [88][89][90][91][92][93][94][95][96][97] A general consensus on the positive effect of SiO 2 in the anode CL was reported, while the effect of silica presence in the cathode CL is controversial. If much water is produced at the cathode, water will move from the cathode to the anode.…”

Section: Sio 2 -Addition To the Catalyst Layermentioning

confidence: 99%

“…Finally, two new methods to introduce SiO 2 in the CL were proposed in recent works. [96,97] Instead of coating the mixture of catalyst, SiO 2 and Nafion on the GDL, Angayarkanni et al [96] first sprayed the catalyst onto the GDL, then the SiO 2 -Nafion mixture was sprayed on the CL. The PEMFC provided an excellent output power of 950 mW cm À 2 for dry and humidified gases.…”

Section: Sio 2 -Addition To the Catalyst Layermentioning

confidence: 99%

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The use of silicon in the membrane electrode assembly of fuel cells

Antolini

2024

ChemCatChem

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Silicon, silicon‐based and Si‐containing materials are widely used and play different roles in fuel cells. These materials have been used overall in polymer electrolyte membrane fuel cells, but also in solid oxide fuel cells and phosphoric acid fuel cells. The most used Si compounds in fuel cells are SiO2 and SiC. In this work an overview of the use of Si‐based and Si‐containing materials in the membrane electrode assembly of fuel cells is presented.

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Section: Sio 2 -Addition To the Catalyst Layermentioning

confidence: 99%

Section: Sio 2 -Addition To the Catalyst Layermentioning

confidence: 99%

The use of silicon in the membrane electrode assembly of fuel cells

Antolini

2024

ChemCatChem

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“…These are used by researchers for its application in cement‐based materials [41] . Besides this, organosilanes are applied for dye removal, [42] and fuel cell purposes [43] . Now‐a‐days organosilanes, have grasped the attention of researchers in field of qualitative and quantitative detection [44] …”

Section: Introductionmentioning

confidence: 99%

“…[41] Besides this, organosilanes are applied for dye removal, [42] and fuel cell purposes. [43] Now-a-days organosilanes, have grasped the attention of researchers in field of qualitative and quantitative detection. [44] Many hybrid structures of organosilanes with triazoles have been reported, most of them being used as metal ion sensors, [45,46] but none of them was investigated as sensor of anions.…”

Section: Introductionmentioning

confidence: 99%

Click‐Generated Triazole‐Based Silanes: A Potent Chemosensor for Dihydrogen Phosphate

et al. 2023

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Over the years, ground and surface water has been reported to be contaminated with phosphates. These phosphates are known to cause various diseases and if present in excess can lead to eutrophication. The known silane chemistry has not been thoroughly investigated for the sensing of anions. In the current study four new triazole based silanes have been prepared by the renowned Click Chemistry for the selective and sensitive detection of dihydrogen phosphate. The synthesized compounds were well characterized by various spectroscopic techniques and their absorptive and emissive responses were investigated for the recognition of dihydrogen phosphate ions. The binding ratio between triazole based silane chemosensor and dihydrogen phosphate has been discovered from Job's plot and was also confirmed by non‐linear fitting method. The value of association constant was found to be 571.18 M−1. The limit of detection (LOD) and limit of quantitation (LOQ) were calculated by fluorescence spectroscopy. The results obtained clearly illustrated that triazole based silane could be used as a potent chemosensor for selective and sensitive recognition of dihydrogen phosphate. Further, the possible binding site of chemosensor for dihydrogen phosphate has been identified from 1H NMR studies and DFT calculations. At last real sample analysis was performed to check the practical applicability of chemosensor.

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“…Inorganic hydrophilic compounds are widely used as water sorbents in the development of PEMFCs that are stable at low humidity; both catalytic layers [ 24 , 25 , 26 , 27 , 28 ] and membranes [ 21 , 29 , 30 , 31 , 32 , 33 ] can be modified. Membrane modification results in a greater water retention effect, but introduction of a sorbent leads to an increase in the ionic resistivity, resulting in PEMFC performance degradation [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

SAXS Investigation of the Effect of Freeze/Thaw Cycles on the Nanostructure of Nafion® Membranes

Mensharapov

Ivanova²,

Spasov³

et al. 2022

Polymers

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In this study, we performed small-angle X-ray scattering (SAXS) to investigate the structure of Nafion® membranes. The effect of freeze/thaw (F/T) cycles (from ambient temperature down to −40 °C) on the membrane nanostructure was considered for the first time. The SAXS measurements were taken for different samples: a commercial Nafion® 212 membrane swollen in water and methanol solution, and a water-swollen silica-modified membrane. The membrane structure parameters were obtained from the measured SAXS profiles using a model-dependent approach. It is shown that the average radius of water channels (Rwc) decreases during F/T cycles due to changes in the membrane structure as a result of ice formation in the pore volume after freezing. The use of water-methanol solution (methanol content of 20 vol.%) for the membrane soaking prevents changes in the membrane structure during F/T cycles compared to the water-swollen membrane. Modification of the membrane surface with silica (SiO2 content of 20 wt.%) led to a redistribution of water in the membrane volume and resulted in a decrease in Rwc. However, Rwc for the modified membrane did not decrease with the increasing number of F/T cycles due to the involvement of SiO2 in the sorption of membrane water and, therefore, the prevention of ice formation.

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Self-humidified operation of a PEM fuel cell using a novel silica composite coating method

Cited by 16 publications

References 30 publications

The use of silicon in the membrane electrode assembly of fuel cells

The use of silicon in the membrane electrode assembly of fuel cells

Click‐Generated Triazole‐Based Silanes: A Potent Chemosensor for Dihydrogen Phosphate

SAXS Investigation of the Effect of Freeze/Thaw Cycles on the Nanostructure of Nafion® Membranes

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