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Experimental and Numerical Study of the effect of Gas-shrouded Plasma Spraying on Cathode Coating of Alkaline Electrolysis Cells

Liu, Taikai and Ansar, Asif (2016) Experimental and Numerical Study of the effect of Gas-shrouded Plasma Spraying on Cathode Coating of Alkaline Electrolysis Cells. Power Generation-Fuel cell, 336. DVS Media GmbH. ISBN 978-3-96144-000-9.

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Official URL: https://www.dvs-ev.de/call4papers/index.cfm?vid=85&id=5

Abstract

Dual layer electrode coating for alkaline water electrolysis was prepared by plasma spraying. For improving performance this work aims at reducing the oxide in electrode coating. Regarding the necessity of obtaining high specific area, atmospheric plasma spray was employed under protection of argon which was used as shrouding gas. Composite cathode was established on Ni-coated perforated steel sheet with crushed and gas atomized Nickel-based alloy powders. The dual-layer structure was a composite of 5 layers of NiAl at the bottom and 10 layers of NiAlMo as the top layer. Microstructure and morphology were studied by scanning electron microscope (SEM). Element content was estimated by energy dispersive X-ray spectrometer (EDS). Enthalpy probe was introduced for measuring plasma temperature and velocity as well as gas composition. Numerical calculation was carried out with same condition for better understanding the shrouding effect. The results showed moderate protection by using of arranged gas shrouding. Overall the dual layer region, Oxygen was decreased by 0.3% from 3.46% to 3.15%. With gas shrouding coating exhibited similar element contents as coating sprayed by VPS. However, no obvious difference was observed in microstructure and morphology with or without gas shrouding.

Item URL in elib:https://elib.dlr.de/114086/
Document Type:Proceedings
Title:Experimental and Numerical Study of the effect of Gas-shrouded Plasma Spraying on Cathode Coating of Alkaline Electrolysis Cells
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Liu, TaikaiTaikai.liu (at) dlr.dehttps://orcid.org/0000-0001-9919-0841
Ansar, Asifsyed-asif.ansar (at) dlr.deUNSPECIFIED
Date:7 June 2016
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:336
Page Range:pp. 121-125
Publisher:DVS Media GmbH
Series Name:Power Generation-Fuel cell
ISBN:978-3-96144-000-9
Status:Published
Keywords:gas shrouding; Plasma spray; alkaline water electrolyser; Simulation and experiment
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrolysis and Hydrogen
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Elektrochemical Processes (Electrolysis)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Liu, Taikai
Deposited On:16 Jan 2018 16:19
Last Modified:31 Jul 2019 20:11

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