Active, durable bismuth oxide-manganite composite oxygen electrodes: Interface formation induced by cathodic polarization

Minle Chen, Yi Cheng, Shuai He, Na Ai, Jean Pierre Veder, William D.A. Rickard, Martin Saunders, Kongfa Chen, Teng Zhang, San Ping Jiang

Research output: Contribution to journalArticle

Abstract

Bismuth oxide is as an active promoter in enhancing the ionic conductivity and electrocatalytic activity of manganite oxygen electrodes of solid oxide cells, but there are very limited reports on the formation and evolution of electrode/electrolyte interface of bismuth oxide-manganite composite electrode under the influence of electrochemical polarization. Herein, we report the effect of electrochemical polarization and direction of polarization current on the electrocatalytic performance and electrode/electrolyte interface of a (La0·8Sr0.2)0.95Mn0·95Pt0·05O3+δ-Er0.4Bi1·6O3 (LSMPt-ESB) composite oxygen electrode assembled on zirconia electrolyte. The cell with the LSMPt-ESB electrode produces outstanding performance for power generation and steam splitting, and it is stable without noticeable degradation during operation at 600 °C for 350 h in the fuel cell mode. The cathodic polarization induces in operando formation of electrode/electrolyte interface with observation of an Er-deficient LSMPt-ESB dense layer and Er-rich (Er,Bi,Mn)Ox particles on the zirconia electrolyte surface. This is different to the case of dwell under open circuit and in particular under anodic polarization conditions. The present study gains insights into the development of high performance, reliable bismuth oxide-manganite composite oxygen electrode for reduced temperature solid oxide cells.

LanguageEnglish
Pages16-24
Number of pages9
JournalJournal of Power Sources
Volume397
DOIs
Publication statusPublished - 1 Sep 2018

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bismuth oxides
Cathodic polarization
Bismuth
Oxygen
Electrodes
Oxides
composite materials
electrodes
Electrolytes
Composite materials
oxygen
polarization
electrolytes
Polarization
zirconium oxides
Zirconia
cells
Anodic polarization
oxides
dwell

Cite this

Chen, Minle ; Cheng, Yi ; He, Shuai ; Ai, Na ; Veder, Jean Pierre ; Rickard, William D.A. ; Saunders, Martin ; Chen, Kongfa ; Zhang, Teng ; Jiang, San Ping. / Active, durable bismuth oxide-manganite composite oxygen electrodes : Interface formation induced by cathodic polarization. In: Journal of Power Sources. 2018 ; Vol. 397. pp. 16-24.
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Active, durable bismuth oxide-manganite composite oxygen electrodes : Interface formation induced by cathodic polarization. / Chen, Minle; Cheng, Yi; He, Shuai; Ai, Na; Veder, Jean Pierre; Rickard, William D.A.; Saunders, Martin; Chen, Kongfa; Zhang, Teng; Jiang, San Ping.

In: Journal of Power Sources, Vol. 397, 01.09.2018, p. 16-24.

Research output: Contribution to journalArticle

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T1 - Active, durable bismuth oxide-manganite composite oxygen electrodes

T2 - Journal of Power Sources

AU - Chen, Minle

AU - Cheng, Yi

AU - He, Shuai

AU - Ai, Na

AU - Veder, Jean Pierre

AU - Rickard, William D.A.

AU - Saunders, Martin

AU - Chen, Kongfa

AU - Zhang, Teng

AU - Jiang, San Ping

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N2 - Bismuth oxide is as an active promoter in enhancing the ionic conductivity and electrocatalytic activity of manganite oxygen electrodes of solid oxide cells, but there are very limited reports on the formation and evolution of electrode/electrolyte interface of bismuth oxide-manganite composite electrode under the influence of electrochemical polarization. Herein, we report the effect of electrochemical polarization and direction of polarization current on the electrocatalytic performance and electrode/electrolyte interface of a (La0·8Sr0.2)0.95Mn0·95Pt0·05O3+δ-Er0.4Bi1·6O3 (LSMPt-ESB) composite oxygen electrode assembled on zirconia electrolyte. The cell with the LSMPt-ESB electrode produces outstanding performance for power generation and steam splitting, and it is stable without noticeable degradation during operation at 600 °C for 350 h in the fuel cell mode. The cathodic polarization induces in operando formation of electrode/electrolyte interface with observation of an Er-deficient LSMPt-ESB dense layer and Er-rich (Er,Bi,Mn)Ox particles on the zirconia electrolyte surface. This is different to the case of dwell under open circuit and in particular under anodic polarization conditions. The present study gains insights into the development of high performance, reliable bismuth oxide-manganite composite oxygen electrode for reduced temperature solid oxide cells.

AB - Bismuth oxide is as an active promoter in enhancing the ionic conductivity and electrocatalytic activity of manganite oxygen electrodes of solid oxide cells, but there are very limited reports on the formation and evolution of electrode/electrolyte interface of bismuth oxide-manganite composite electrode under the influence of electrochemical polarization. Herein, we report the effect of electrochemical polarization and direction of polarization current on the electrocatalytic performance and electrode/electrolyte interface of a (La0·8Sr0.2)0.95Mn0·95Pt0·05O3+δ-Er0.4Bi1·6O3 (LSMPt-ESB) composite oxygen electrode assembled on zirconia electrolyte. The cell with the LSMPt-ESB electrode produces outstanding performance for power generation and steam splitting, and it is stable without noticeable degradation during operation at 600 °C for 350 h in the fuel cell mode. The cathodic polarization induces in operando formation of electrode/electrolyte interface with observation of an Er-deficient LSMPt-ESB dense layer and Er-rich (Er,Bi,Mn)Ox particles on the zirconia electrolyte surface. This is different to the case of dwell under open circuit and in particular under anodic polarization conditions. The present study gains insights into the development of high performance, reliable bismuth oxide-manganite composite oxygen electrode for reduced temperature solid oxide cells.

KW - Bismuth oxide

KW - In situ electrode/electrolyte interface formation

KW - Manganite

KW - Solid oxide cells

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