Characterisation and processing of aqueous LaNi0.6Fe0.4O3 Suspensions into Porous Electrode Layers for Alkaline Water Electrolysis

Jens Q. Adolphsen; Vanesa Gil; Bhaskar R. Sudireddy; Lennart Bergström

doi:10.1016/j.jeurceramsoc.2018.10.020

Characterisation and processing of aqueous LaNi_0.6Fe_0.4O₃ Suspensions into Porous Electrode Layers for Alkaline Water Electrolysis

Jens Q. Adolphsen^*, Vanesa Gil, Bhaskar R. Sudireddy, Lennart Bergström

^*Corresponding author for this work

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The colloidal properties and processing of aqueous LaNi_0.6.Fe_0.4O₃ suspensions into electrode layers with hierarchical pore sizes has been investigated by light scattering, electron microscopy and rheology. We found that the colloidal stability of the oxide particles and the resulting microstructure of the electrode layers were similar when dispersing the particles at their intrinsic pH, or when adding polyvinylpyrrolidone. The addition of the ammonium salt of poly(methaacrylic acid) resulted in a poor colloidal stability and the concentrated suspensions became viscoelastic during processing. Addition of rice starch resulted in an increase of the porosity but the cast electrode layers cracked and delaminated.

Original language	English
Journal	Journal of the European Ceramic Society
Volume	39
Issue number	4
Pages (from-to)	1271-1278
Number of pages	8
ISSN	0955-2219
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2018.10.020
Publication status	Published - 2019

Keywords

Alkaline Electrolysis
Ceramic processing
Characterization of ceramic suspensions
Porous electrodes

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title = "Characterisation and processing of aqueous LaNi0.6Fe0.4O3 Suspensions into Porous Electrode Layers for Alkaline Water Electrolysis",

abstract = "The colloidal properties and processing of aqueous LaNi0.6.Fe0.4O3 suspensions into electrode layers with hierarchical pore sizes has been investigated by light scattering, electron microscopy and rheology. We found that the colloidal stability of the oxide particles and the resulting microstructure of the electrode layers were similar when dispersing the particles at their intrinsic pH, or when adding polyvinylpyrrolidone. The addition of the ammonium salt of poly(methaacrylic acid) resulted in a poor colloidal stability and the concentrated suspensions became viscoelastic during processing. Addition of rice starch resulted in an increase of the porosity but the cast electrode layers cracked and delaminated.",

keywords = "Alkaline Electrolysis, Ceramic processing, Characterization of ceramic suspensions, Porous electrodes",

author = "Adolphsen, {Jens Q.} and Vanesa Gil and Sudireddy, {Bhaskar R.} and Lennart Bergstr{\"o}m",

year = "2019",

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volume = "39",

pages = "1271--1278",

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T1 - Characterisation and processing of aqueous LaNi0.6Fe0.4O3 Suspensions into Porous Electrode Layers for Alkaline Water Electrolysis

AU - Adolphsen, Jens Q.

AU - Gil, Vanesa

AU - Sudireddy, Bhaskar R.

AU - Bergström, Lennart

PY - 2019

Y1 - 2019

N2 - The colloidal properties and processing of aqueous LaNi0.6.Fe0.4O3 suspensions into electrode layers with hierarchical pore sizes has been investigated by light scattering, electron microscopy and rheology. We found that the colloidal stability of the oxide particles and the resulting microstructure of the electrode layers were similar when dispersing the particles at their intrinsic pH, or when adding polyvinylpyrrolidone. The addition of the ammonium salt of poly(methaacrylic acid) resulted in a poor colloidal stability and the concentrated suspensions became viscoelastic during processing. Addition of rice starch resulted in an increase of the porosity but the cast electrode layers cracked and delaminated.

AB - The colloidal properties and processing of aqueous LaNi0.6.Fe0.4O3 suspensions into electrode layers with hierarchical pore sizes has been investigated by light scattering, electron microscopy and rheology. We found that the colloidal stability of the oxide particles and the resulting microstructure of the electrode layers were similar when dispersing the particles at their intrinsic pH, or when adding polyvinylpyrrolidone. The addition of the ammonium salt of poly(methaacrylic acid) resulted in a poor colloidal stability and the concentrated suspensions became viscoelastic during processing. Addition of rice starch resulted in an increase of the porosity but the cast electrode layers cracked and delaminated.

KW - Alkaline Electrolysis

KW - Ceramic processing

KW - Characterization of ceramic suspensions

KW - Porous electrodes

U2 - 10.1016/j.jeurceramsoc.2018.10.020

DO - 10.1016/j.jeurceramsoc.2018.10.020

M3 - Journal article

SN - 0955-2219

VL - 39

SP - 1271

EP - 1278

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 4

ER -