掺杂对CeO2基电解质材料性能的影响研究进展

doi:10.11962/1006-4990.2019-0388

Abstract

Abstract:

The doped CeO₂-based material is an ideal electrolyte material for medium-low temperature solid oxide fuel cells（SOFC）.Firstly,the relationship between the structure and properties of doped CeO₂-based electrolytes was described.Then,the effects of metal ion doping on the crystal structure and electronic structure of CeO₂-based electrolytes were introduced. The effects of single-element doping and two-element doping on the properties of CeO₂-based electrolytes were mainly revie-wed.By analysis,the results showed that：comparing with single-doping of alkaline earth elements,the single-doping of rare earth metal elements significantly improved the conductivity of CeO₂-based electrolytes,but the raw material cost of rare earth oxides was much higher than that of rare earth oxides.CeO₂-based electrolytes doping with two-element presented more oxygen vacancy disorder and less oxygen ion mobility activation energy than the single-element doping,so two-element doping had more advantages in improving the ionic conductivity of the CeO₂-based electrolyte.The doping rules and relationship be-tween the structure and properties of CeO₂-based electrolyte materials was summarized,in order to play a guiding role in the preparation of CeO₂-based electrolytes with better performance.

Key words: solid oxide fuel cell（SOFC）, CeO₂-based electrolyte, alkaline earth metal element doping, rare earth metal element doping, transition metal element doping

CLC Number:

TQ133.3

Zhang Jie,Zhao Mengjie,Cui Yingqi,Li Chenggang,Gao Jinhai. Research progress in effect of doping on properties of CeO₂-based electrolyte materials[J]. Inorganic Chemicals Industry, 2020, 52(5): 1-5.

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References 20

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试样	电导率/（S·cm^-1）
（CeO₂）_0.8（Gd₂O₃）_0.1	0.088 0
（CeO₂）_0.8（Sm₂O₃）_0.02（Gd₂O₃）_0.08	0.074 7
（CeO₂）_0.8（Sm₂O₃）_0.04（Gd₂O₃）_0.06	0.048 0
（CeO₂）_0.8（Sm₂O₃）_0.06（Gd₂O₃）_0.04	0.098 7
（CeO₂）_0.8（Sm₂O₃）_0.08（Gd₂O₃）_0.02	0.103 0
（CeO₂）_0.8（Sm₂O₃）_0.1	0.059 0

样品	电导率/（10^-2 S·cm^-1）
样品	1 000 ℃	1 100 ℃	1 200 ℃	1 300 ℃
CGO	1.83	2.91	5.27	5.28
2Mn-CGO	3.95	4.52	5.24	3.24

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Research progress in effect of doping on properties of CeO₂-based electrolyte materials

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Research progress in effect of doping on properties of CeO2-based electrolyte materials