Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC
Yttrium and aluminium co-substitutions on lanthanum molybdate ceramics with the nominal formula La1.75Y0.25Mo2-xAlxO9-δδ (LYMA, x = 0, 0.1, 0.2, 0.3 and 0.4) were synthesized by citric acid-nitrate combustion method and used for preparation of solid electrolyte for intermediate-temperature solid oxi...
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| Format: | Article |
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University of Novi Sad
2023-03-01
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| Series: | Processing and Application of Ceramics |
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| Online Access: | https://www.doiserbia.nb.rs/img/doi/1820-6131/2023/1820-61312301031T.pdf |
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| author | Tian Changan Zhu Minzheng Shao Lingbo Qu Xiaoling Zhu Lejie Chen Chao Wang Cao Liu Yang |
| author_facet | Tian Changan Zhu Minzheng Shao Lingbo Qu Xiaoling Zhu Lejie Chen Chao Wang Cao Liu Yang |
| author_sort | Tian Changan |
| collection | DOAJ |
| description | Yttrium and aluminium co-substitutions on lanthanum molybdate ceramics with the nominal formula La1.75Y0.25Mo2-xAlxO9-δδ (LYMA, x = 0, 0.1, 0.2, 0.3 and 0.4) were synthesized by citric acid-nitrate combustion method and used for preparation of solid electrolyte for intermediate-temperature solid oxide fuel cells (ITSOFCs). Phase composition, structure, conductivity and electrical properties of LYMA have been investigated as a function of aluminium content by X-ray diffraction, scanning electron microscopy and electrochemical impedance spectroscopy, respectively. Experimental results showed that the substitution of La and Mo with appropriate amounts of Y and Al can effectively stabilize the β-form of La2Mo2O9 at room temperature and inhibit its phase transition to α-form. The LYMA synthesized by combustion method exhibited a better sinterability where relative density of the samples sintered at 950°C for 4 h was higher than 95%TD. The performance of the LYMA electrolyte was found to be related to Al-content. The La1.75Y0.25Mo1.8Al0.2O8.7 exhibited high oxide ion conductivity (σ= 42mS/cm at 800°C) and low electrical activation energy (Ea = 1.18 eV). These preliminary results indicate that the LYMA is a promising electrolyte for IT-SOFCs. |
| first_indexed | 2024-04-09T16:51:46Z |
| format | Article |
| id | doaj.art-e4e1e33fe398497aa6f8484f498a1394 |
| institution | Directory Open Access Journal |
| issn | 1820-6131 2406-1034 |
| language | English |
| last_indexed | 2024-04-09T16:51:46Z |
| publishDate | 2023-03-01 |
| publisher | University of Novi Sad |
| record_format | Article |
| series | Processing and Application of Ceramics |
| spelling | doaj.art-e4e1e33fe398497aa6f8484f498a13942023-04-21T10:57:32ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61312406-10342023-03-01171313810.2298/PAC2301031TPreparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFCTian Changan0Zhu Minzheng1Shao Lingbo2Qu Xiaoling3Zhu Lejie4Chen Chao5Wang Cao6Liu Yang7College of Chemistry and Civil Engineering, Shaoguan University, Shaoguan, ChinaCollege of Chemistry and Civil Engineering, Shaoguan University, Shaoguan, China + College of Energy Material and Chemical Engineering, Hefei University, Hefei, ChinaCollege of Energy Material and Chemical Engineering, Hefei University, Hefei, ChinaCollege of Chemistry and Civil Engineering, Shaoguan University, Shaoguan, ChinaCollege of Chemistry and Civil Engineering, Shaoguan University, Shaoguan, ChinaCollege of Chemistry and Civil Engineering, Shaoguan University, Shaoguan, ChinaCollege of Chemistry and Civil Engineering, Shaoguan University, Shaoguan, ChinaCollege of Chemistry and Civil Engineering, Shaoguan University, Shaoguan, ChinaYttrium and aluminium co-substitutions on lanthanum molybdate ceramics with the nominal formula La1.75Y0.25Mo2-xAlxO9-δδ (LYMA, x = 0, 0.1, 0.2, 0.3 and 0.4) were synthesized by citric acid-nitrate combustion method and used for preparation of solid electrolyte for intermediate-temperature solid oxide fuel cells (ITSOFCs). Phase composition, structure, conductivity and electrical properties of LYMA have been investigated as a function of aluminium content by X-ray diffraction, scanning electron microscopy and electrochemical impedance spectroscopy, respectively. Experimental results showed that the substitution of La and Mo with appropriate amounts of Y and Al can effectively stabilize the β-form of La2Mo2O9 at room temperature and inhibit its phase transition to α-form. The LYMA synthesized by combustion method exhibited a better sinterability where relative density of the samples sintered at 950°C for 4 h was higher than 95%TD. The performance of the LYMA electrolyte was found to be related to Al-content. The La1.75Y0.25Mo1.8Al0.2O8.7 exhibited high oxide ion conductivity (σ= 42mS/cm at 800°C) and low electrical activation energy (Ea = 1.18 eV). These preliminary results indicate that the LYMA is a promising electrolyte for IT-SOFCs.https://www.doiserbia.nb.rs/img/doi/1820-6131/2023/1820-61312301031T.pdfsofcselectrolytela2mo2o9combustion methodconductivity |
| spellingShingle | Tian Changan Zhu Minzheng Shao Lingbo Qu Xiaoling Zhu Lejie Chen Chao Wang Cao Liu Yang Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC Processing and Application of Ceramics sofcs electrolyte la2mo2o9 combustion method conductivity |
| title | Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC |
| title_full | Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC |
| title_fullStr | Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC |
| title_full_unstemmed | Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC |
| title_short | Preparation and characterization of La1.75Y0.25Mo2-xAlxO9-δ as solid electrolyte for intermediate temperatures SOFC |
| title_sort | preparation and characterization of la1 75y0 25mo2 xalxo9 δ as solid electrolyte for intermediate temperatures sofc |
| topic | sofcs electrolyte la2mo2o9 combustion method conductivity |
| url | https://www.doiserbia.nb.rs/img/doi/1820-6131/2023/1820-61312301031T.pdf |
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