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Effect of vanadium ion valence state on the deposition behaviour in molten salt electrolysis

Gussone, Joachim and Yerragudi Vijay, Chakradhar Reddy and Haubrich, Jan and Milicevic, Ksenija and Friedrich, Bernd (2018) Effect of vanadium ion valence state on the deposition behaviour in molten salt electrolysis. Journal of Applied Electrochemistry, 48 (4), pp. 427-434. Springer. DOI: 10.1007/s10800-018-1165-7 ISSN 0021-891X

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Official URL: https://link.springer.com/article/10.1007/s10800-018-1165-7

Abstract

The electrodeposition process of vanadium from LiCl-KCl base electrolytes was investigated by means of cyclic voltammetry, galvanostatic electrolyses and micro analytical analysis of the deposits. It is demonstrated that the valence state of the vanadium ions has a critical influence on the feasibility of performing a reproducible and stable coating process aiming to obtain compact vanadium films. When the electrolyte contained predominantly trivalent vanadium ions, the process was unstable and the deposit consisted of dendrites. In contrast, making use of a comproportionation reaction of metallic vanadium and VCl3 to divalent vanadium ions led to a stable deposition behaviour and allowed to obtain thick deposits with high current efficiencies. The disadvantageous behaviour of melts with mostly trivalent ions is explained by the fact that deposition is interfered by the reduction of trivalent to divalent ions under limiting current conditions.

Item URL in elib:https://elib.dlr.de/122638/
Document Type:Article
Title:Effect of vanadium ion valence state on the deposition behaviour in molten salt electrolysis
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gussone, Joachimjoachim.gussone (at) dlr.deUNSPECIFIED
Yerragudi Vijay, Chakradhar ReddyUNSPECIFIEDUNSPECIFIED
Haubrich, JanJan.Haubrich (at) dlr.deUNSPECIFIED
Milicevic, KsenijaRWTH AachenUNSPECIFIED
Friedrich, BerndRWTH AachenUNSPECIFIED
Date:February 2018
Journal or Publication Title:Journal of Applied Electrochemistry
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:48
DOI :10.1007/s10800-018-1165-7
Page Range:pp. 427-434
Publisher:Springer
ISSN:0021-891X
Status:Published
Keywords:Electrodeposition, Molten salt, Valence state, Vanadium
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Gussone, Joachim
Deposited On:13 Nov 2018 11:25
Last Modified:31 Jul 2019 20:20

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