Devashish Kulkarni

Influence of porous transport layer and microporous layer morphologies on oxygen content and cell performance for proton exchange membrane water electrolyzers with low catalyst loadings

Jack Todd Lang, Serafina Fortiner, Ryan J. Ouimet, Hung-Ming Joseph Chang et autres

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Using Distribution of Relaxation Time (DRT) Analysis to Characterize Industrial Proton Exchange Membrane Water Electrolyzers

Devashish Kulkarni, Hanna Soucie, Devi varaprasad Ruttala, Ryan J. Ouimet et autres

Proton Exchange Membrane Water Electrolyzers (PEMWEs) are gaining traction for their high efficiency and reliability in producing hydrogen from renewable energy sources. The multitude of complex electrochemical processes occurring in the cells is important to characterize in order to develop robust electrodes …

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Physical model and experimental validation of a high temperature proton exchange membrane electrochemical hydrogen pump cell for efficient single-stage extraction of low concentration hydrogen gas

John Stansberry, A. Perego, Devashish Kulkarni, Dilworth Y. Parkinson et autres

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Proton Exchange Membrane (PEM) Water Electrolysis: Cell-Level Considerations for Gigawatt-Scale Deployment

Cliffton Wang, John Stansberry, Rangachary Mukundan, Hung-Ming Joseph Chang et autres

Hydrogen produced with no greenhouse gas emissions is termed "green hydrogen" and will be essential to reaching decarbonization targets set forth by nearly every country as per the Paris Agreement. Proton exchange membrane water electrolyzers (PEMWEs) are expected to contribute substantially to …

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Development and Characterization of Commercial-Scale Microporous Layers on Porous Transport Layers for Proton Exchange Membrane Water Electrolyzers

Ryan J. Ouimet, Hanna Soucie, Serafina Fortiner, Devashish Kulkarni et autres

One of the critical components of a proton exchange membrane (PEM) water electrolyzer is the porous transport layer (PTL). PTLs help control the water and gas flow to and from the cell and provide an electrical interface between the system and the …

Accelerated Stress Tests Protocol Development for Industrial PEM Electrolyzer Stacks

Devi varaprasad Ruttala, Devashish Kulkarni, Ryan J. Ouimet, Sergio P Bakovic et autres

The deployment of NEL’s next-gen PEM water electrolyzer stacks and systems is very much dependent on our ability to evaluate the degradation of individual components and thereby predict 50000 hr. operability of the stack. In addition, Nel Hydrogen is constantly working to …

Optimization of Transport Components and Electrode Interfaces for Low Iridium Oxide Loading PEM Electrolysis

Jack Todd Lang, Serafina Fortiner, Ryan J. Ouimet, Devashish Kulkarni et autres

Moving towards lower iridium oxide (IrOx) catalyst loadings for the anode side of polymer electrolyte membrane water electrolyzers (PEMWE) requires tuning of the catalyst layer-porous transport layer (PTL) interface. To see widespread deployment, PEMWE anodes need to lower the loadings from 1-2 …

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Design of PEM water electrolysers with low iridium loading

Cliffton Wang, Keonhag Lee, Christopher Pantayatiwong Liu, Devashish Kulkarni et autres

To enable gigawatt-scale deployment of proton exchange membrane water electrolysers (PEMWEs), drastic reductions from current iridium loadings of 2–3 mg Ir cm −2 to less than 0.4 mg Ir cm −2 must occur due to iridium's high cost and scarcity. State-of-the-art systems …

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Influence of Microporous Layers on Interfacial Properties, Oxygen Flow Distribution, and Durability of Proton Exchange Membrane Water Electrolyzers

Devashish Kulkarni, Ryan J. Ouimet, Bryan Erb, Dilworth Y. Parkinson et autres

The efficient and cost-effective production of green hydrogen is essential to decarbonize heavily polluting sectors such as transportation and heavy manufacturing industries such as metal refining. Polymer electrolyte membrane water electrolysis (PEMWE) is the most promising and rapidly maturing technology for producing …

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Development and Characterization of Microporous Layers on Porous Transport Layers for Proton Exchange Membrane Water Electrolyzers

Ryan J. Ouimet, Serafina Fortiner, Devashish Kulkarni, Iryna V. Zenyuk et autres

Porous transport layers (PTLs) serve many important functions for proton exchange membrane water electrolyzers. PTLs facilitate fluid transport towards and away from the anode catalyst layer, act as a mechanical support for the membrane, and provide electrical contact with the anode catalyst …

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A New Semi-Empirical Method of Quantifying Electrolyzer Degradation

Shaina Errico, Serafina Fortiner, Devashish Kulkarni, Andrew R Motz

Electrolyzers are a key component in transitioning the world’s reliance on fossil fuels for energy. Accordingly, a substantial influence on electrolyzer costs is operational efficiency. The means of quantifying this efficiency is necessary for sustaining the continuous improvement of this technology. Polarization …

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X-ray Tomography Applied to Electrochemical Devices and Electrocatalysis

Jack Todd Lang, Devashish Kulkarni, Collin Foster, Ying Huang et autres

X-ray computed tomography (CT) is a nondestructive three-dimensional (3D) imaging technique used for studying morphological properties of porous and nonporous materials. In the field of electrocatalysis, X-ray CT is mainly used to quantify the morphology of electrodes and extract information such as …

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