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La0.4Sr0.6Co0.7Fe0.2Nb0.1O3- δ -Gd0.2Ce0.8O2- δ as Symmetrical Elec-trode Material for Reversible Solid Oxide Cells
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Affiliation:

Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, China

Clc Number:

TM911.4

Fund Project:

Projects of Jilin Province Development and Reform Commission (2020C026-4); Science and Technology Research Projects of the Education Committee of Jilin Province (JJKH20200423KJ)

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    Abstract:

    La0.4Sr0.6Co0.7Fe0.2Nb0.1O3-δ-Gd0.2Ce0.8O2-δ (LSCFN-GDC) with high catalytic performance was synthesized by one-step co-synthesis method for developing a symmetrical reversible solid oxide cell (SOC) electrode. Electrolyte-supported symmetrical SOCs were fabricated by tape-casting and screen-printing methods with La0.8Sr0.2Ga0.83Mg0.17O3-δ (LSGM) as the electrolyte and LSCFN-GDC as both anode and cathode. The configuration of SOC is LSCFN-GDC||LSGM||LSCFN-GDC. Solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) modes were used to test the performance of SOCs. The results show that the maximum power densities are 1.036, 0.996, 0.479, and 0.952 W/cm2 under the atmosphere of fuel gas of H2 (3% H2O), H2 (0.01% H2S), CH4, and C3H8 at 850 °C, respectively. The current density at the electrolytic voltage of 1.3 V is 0.943 A/cm2 during the electrolysis of H2 (50% H2O). LSCFN-GDC has good coking-resistance, sulfur-tolerance, and redox stability, and its stable performance can be sustained for 700 h under the atmosphere of H2 (0.01% H2S), CH4, H2 (3% H2O), and H2 (50% H2O). The results indicate that the one-step method is a facile and optimized fabrication procedure of electrode and LSCFN-GDC||LSGM||LSCFN-GDC SOCs have great potential in further application.

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[Xu Na, Sun Mengzhen, Geng Duo, Yu Longjiao, Xu Zhanlin. La0.4Sr0.6Co0.7Fe0.2Nb0.1O3- δ -Gd0.2Ce0.8O2- δ as Symmetrical Elec-trode Material for Reversible Solid Oxide Cells[J]. Rare Metal Materials and Engineering,2021,50(11):3885~3889.]
DOI:10.12442/j. issn.1002-185X. E20200050

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History
  • Received:October 11,2020
  • Revised:November 19,2020
  • Adopted:December 22,2020
  • Online: November 25,2021
  • Published: November 24,2021