An easily controllable flash sintering process for densification of electrolyte for application in solid oxide fuel cells

Jing Zhang; Yating Zhao; Jinshuo Qiao; Wang Sun; Kening Sun; Zhenhua Wang

doi:10.1016/j.ijhydene.2020.04.204

An easily controllable flash sintering process for densification of electrolyte for application in solid oxide fuel cells

Jing Zhang, Yating Zhao, Jinshuo Qiao, Wang Sun, Kening Sun, Zhenhua Wang^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

A step-wise current-limiting flash sintering process (SCFS process) was proposed to densify La_0.8Sr_0.2Ga_0.8Mg_0.2O_3-δ (LSGM) electrolyte. Well-densified microstructures of LSGM samples were obtained at 690 °C under an electric field of 100 V cm⁻¹. Compared with the current-limiting flash sintering process, the spike in power dissipation was avoided, the shrinkage rate of LSGM samples was moderate, and the microstructures of LSGM samples were uniform. The conductivity of LSGM samples sintered via SCFS process at 0.9 A for 30 min reached 0.072 S cm⁻¹ at 850 °C, and this was approximately the same as the value of conventionally sintered LSGM samples at 1400 °C for 10 h. These results proved that SCFS process achieved easy controllability, and it is expected that SCFS process can be applied in industry.

Original language	English
Pages (from-to)	17824-17832
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	45
Issue number	35
DOIs	https://doi.org/10.1016/j.ijhydene.2020.04.204
Publication status	Published - 10 Jul 2020

Keywords

Controllability
Densification
LaSrGaMgO
Step-wise current-limiting flash sintering process

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2020.04.204

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title = "An easily controllable flash sintering process for densification of electrolyte for application in solid oxide fuel cells",

abstract = "A step-wise current-limiting flash sintering process (SCFS process) was proposed to densify La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) electrolyte. Well-densified microstructures of LSGM samples were obtained at 690 °C under an electric field of 100 V cm−1. Compared with the current-limiting flash sintering process, the spike in power dissipation was avoided, the shrinkage rate of LSGM samples was moderate, and the microstructures of LSGM samples were uniform. The conductivity of LSGM samples sintered via SCFS process at 0.9 A for 30 min reached 0.072 S cm−1 at 850 °C, and this was approximately the same as the value of conventionally sintered LSGM samples at 1400 °C for 10 h. These results proved that SCFS process achieved easy controllability, and it is expected that SCFS process can be applied in industry.",

keywords = "Controllability, Densification, LaSrGaMgO, Step-wise current-limiting flash sintering process",

author = "Jing Zhang and Yating Zhao and Jinshuo Qiao and Wang Sun and Kening Sun and Zhenhua Wang",

note = "Publisher Copyright: {\textcopyright} 2020 Hydrogen Energy Publications LLC",

year = "2020",

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doi = "10.1016/j.ijhydene.2020.04.204",

language = "English",

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T1 - An easily controllable flash sintering process for densification of electrolyte for application in solid oxide fuel cells

AU - Zhang, Jing

AU - Zhao, Yating

AU - Qiao, Jinshuo

AU - Sun, Wang

AU - Sun, Kening

AU - Wang, Zhenhua

PY - 2020/7/10

Y1 - 2020/7/10

N2 - A step-wise current-limiting flash sintering process (SCFS process) was proposed to densify La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) electrolyte. Well-densified microstructures of LSGM samples were obtained at 690 °C under an electric field of 100 V cm−1. Compared with the current-limiting flash sintering process, the spike in power dissipation was avoided, the shrinkage rate of LSGM samples was moderate, and the microstructures of LSGM samples were uniform. The conductivity of LSGM samples sintered via SCFS process at 0.9 A for 30 min reached 0.072 S cm−1 at 850 °C, and this was approximately the same as the value of conventionally sintered LSGM samples at 1400 °C for 10 h. These results proved that SCFS process achieved easy controllability, and it is expected that SCFS process can be applied in industry.

AB - A step-wise current-limiting flash sintering process (SCFS process) was proposed to densify La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) electrolyte. Well-densified microstructures of LSGM samples were obtained at 690 °C under an electric field of 100 V cm−1. Compared with the current-limiting flash sintering process, the spike in power dissipation was avoided, the shrinkage rate of LSGM samples was moderate, and the microstructures of LSGM samples were uniform. The conductivity of LSGM samples sintered via SCFS process at 0.9 A for 30 min reached 0.072 S cm−1 at 850 °C, and this was approximately the same as the value of conventionally sintered LSGM samples at 1400 °C for 10 h. These results proved that SCFS process achieved easy controllability, and it is expected that SCFS process can be applied in industry.

KW - Controllability

KW - Densification

KW - LaSrGaMgO

KW - Step-wise current-limiting flash sintering process

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U2 - 10.1016/j.ijhydene.2020.04.204

DO - 10.1016/j.ijhydene.2020.04.204

M3 - Article

AN - SCOPUS:85085330861

SN - 0360-3199

VL - 45

SP - 17824

EP - 17832

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 35

ER -

An easily controllable flash sintering process for densification of electrolyte for application in solid oxide fuel cells

Abstract

Keywords

UN SDGs

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