NiO/YSZ Reduction for SOFC/SOEC Studied In Situ by Environmental Transmission Electron Microscopy

Søren Bredmose Simonsen; Karsten Agersted; Karin Vels Hansen; Torben Jacobsen; Jakob Birkedal Wagner; Thomas Willum Hansen; Luise Theil Kuhn

doi:10.1149/06402.0073ecst

NiO/YSZ Reduction for SOFC/SOEC Studied In Situ by Environmental Transmission Electron Microscopy

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Abstract

A typical anode for solid oxide fuel cells (SOFC) or cathode for solid oxide electrolysis cells (SOEC) is a complex porous structure of Ni and yttria-stabilized zirconia (YSZ). The porous Ni/YSZ is usually prepared from powder mixtures of NiO and YSZ, tape casted and sintered into a dense structure and finally reduced during start-up of the SOFC/SOEC in H2 at the operating temperature of the cell (ca. 800 °C). This contribution presents environmental transmission electron microscopy (ETEM) nanoscale observations of the reduction process of a NiO/YSZ powder in H2 at temperatures up to almost 1000 °C. The study focusses on the temperature dependent dynamical morphology of the NiO/YSZ and on the possible influence of YSZ on the NiO reduction.

Original language	English
Journal	ECS Transactions
Volume	64
Issue number	2
Pages (from-to)	73-80
Number of pages	8
ISSN	1938-5862
DOIs	https://doi.org/10.1149/06402.0073ecst
Publication status	Published - 2014
Event	226th Meeting of the Electrochemical Society (ECS) and 7th Meeting of the Mexico Section of the Electrochemical Society ECS and SMEQ Joint International Meeting : Joint international meeting - Cancun, Mexico Duration: 5 Oct 2014 → 9 Oct 2014 Conference number: 226

Conference

Conference	226th Meeting of the Electrochemical Society (ECS) and 7th Meeting of the Mexico Section of the Electrochemical Society ECS and SMEQ Joint International Meeting
Number	226
Country/Territory	Mexico
City	Cancun
Period	05/10/2014 → 09/10/2014

Keywords

Solid Oxide Fuel Cells

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10.1149/06402.0073ecst

Simonsen manuscript ECS transAccepted author manuscript, 444 KB

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title = "NiO/YSZ Reduction for SOFC/SOEC Studied In Situ by Environmental Transmission Electron Microscopy",

abstract = "A typical anode for solid oxide fuel cells (SOFC) or cathode for solid oxide electrolysis cells (SOEC) is a complex porous structure of Ni and yttria-stabilized zirconia (YSZ). The porous Ni/YSZ is usually prepared from powder mixtures of NiO and YSZ, tape casted and sintered into a dense structure and finally reduced during start-up of the SOFC/SOEC in H2 at the operating temperature of the cell (ca. 800 °C). This contribution presents environmental transmission electron microscopy (ETEM) nanoscale observations of the reduction process of a NiO/YSZ powder in H2 at temperatures up to almost 1000 °C. The study focusses on the temperature dependent dynamical morphology of the NiO/YSZ and on the possible influence of YSZ on the NiO reduction.",

keywords = "Solid Oxide Fuel Cells",

author = "Simonsen, \{S{\o}ren Bredmose\} and Karsten Agersted and Hansen, \{Karin Vels\} and Torben Jacobsen and Wagner, \{Jakob Birkedal\} and Hansen, \{Thomas Willum\} and Kuhn, \{Luise Theil\}",

year = "2014",

doi = "10.1149/06402.0073ecst",

language = "English",

volume = "64",

pages = "73--80",

journal = "ECS Transactions",

issn = "1938-5862",

publisher = "The Electrochemical Society",

number = "2",

note = "226th Meeting of the Electrochemical Society (ECS) and 7th Meeting of the Mexico Section of the Electrochemical Society ECS and SMEQ Joint International Meeting : Joint international meeting, 2014 ECS and SMEQ ; Conference date: 05-10-2014 Through 09-10-2014",

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TY - GEN

T1 - NiO/YSZ Reduction for SOFC/SOEC Studied In Situ by Environmental Transmission Electron Microscopy

AU - Simonsen, Søren Bredmose

AU - Agersted, Karsten

AU - Hansen, Karin Vels

AU - Jacobsen, Torben

AU - Wagner, Jakob Birkedal

AU - Hansen, Thomas Willum

AU - Kuhn, Luise Theil

N1 - Conference code: 226

PY - 2014

Y1 - 2014

N2 - A typical anode for solid oxide fuel cells (SOFC) or cathode for solid oxide electrolysis cells (SOEC) is a complex porous structure of Ni and yttria-stabilized zirconia (YSZ). The porous Ni/YSZ is usually prepared from powder mixtures of NiO and YSZ, tape casted and sintered into a dense structure and finally reduced during start-up of the SOFC/SOEC in H2 at the operating temperature of the cell (ca. 800 °C). This contribution presents environmental transmission electron microscopy (ETEM) nanoscale observations of the reduction process of a NiO/YSZ powder in H2 at temperatures up to almost 1000 °C. The study focusses on the temperature dependent dynamical morphology of the NiO/YSZ and on the possible influence of YSZ on the NiO reduction.

AB - A typical anode for solid oxide fuel cells (SOFC) or cathode for solid oxide electrolysis cells (SOEC) is a complex porous structure of Ni and yttria-stabilized zirconia (YSZ). The porous Ni/YSZ is usually prepared from powder mixtures of NiO and YSZ, tape casted and sintered into a dense structure and finally reduced during start-up of the SOFC/SOEC in H2 at the operating temperature of the cell (ca. 800 °C). This contribution presents environmental transmission electron microscopy (ETEM) nanoscale observations of the reduction process of a NiO/YSZ powder in H2 at temperatures up to almost 1000 °C. The study focusses on the temperature dependent dynamical morphology of the NiO/YSZ and on the possible influence of YSZ on the NiO reduction.

KW - Solid Oxide Fuel Cells

U2 - 10.1149/06402.0073ecst

DO - 10.1149/06402.0073ecst

M3 - Conference article

SN - 1938-5862

VL - 64

SP - 73

EP - 80

JO - ECS Transactions

JF - ECS Transactions

IS - 2

T2 - 226th Meeting of the Electrochemical Society (ECS) and 7th Meeting of the Mexico Section of the Electrochemical Society ECS and SMEQ Joint International Meeting

Y2 - 5 October 2014 through 9 October 2014

ER -

NiO/YSZ Reduction for SOFC/SOEC Studied In Situ by Environmental Transmission Electron Microscopy

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