Bi1.8Gd0.1Er0.05M0.05O3 (M = Pr, Sm, Dy and Y) electrolytes for intermediate temperature solid oxide fuel cells

被引：0

作者：

Yang, Jie ^{[1
,2
]}

Li, Dong ^{[1
,2
]}

Feng, Kexin ^{[1
,2
]}

Wang, Shiqi ^{[1
,2
]}

Du, Chang ^{[1
,2
]}

Meng, Jinlei ^{[1
,2
]}

机构：

[1] Hefei Univ, Sch Energy Mat & Chem Engn, Hefei 230601, Anhui, Peoples R China

[2] Hefei Univ, Carbon Neutral & Carbon Peaking Mat & Resource Che, Hefei 230601, Anhui, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2024年 / 50卷 / 19期

关键词：

olid oxide fuel cell electrolyte; Ternary doping; SINTERED OXIDES; ION CONDUCTION; PHASE; FABRICATION; Y2O3; HO;

D O I：

10.1016/j.ceramint.2024.06.352

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, a novel solid electrolyte system consisting of co-doped cubic phase stabilised bismuth oxide was successfully synthesized via the sol-gel method. X-ray diffraction (XRD) analysis revealed that all synthesized samples exhibited stable cubic fluorite-type structures. Notably, as the dopant ion radius decreased, a trend of increasing full width half maximum (FWHM) of the main (111) peak and crystal microstrain, along with a decrease in the average crystallite size and lattice constant, was observed. Interestingly, the sample Bi1.8Gd0.1Er0.05Pr0.05O3, possessing a dopant ion radius closest to Bi3+ (1.17 & Aring;), exhibited exceptional electrical properties, achieving a high conductivity of 0.347 S cm-1 at 800 degrees C and a low activation energy of 0.20 eV for the high-temperature regions (HTR). This superior performance was attributed to the significant role played by the grain boundary volume and conductivity in facilitating ionic conduction, thus explaining the variations in conductivity among the different samples.

引用

页码：35414 / 35420

页数：7

共 36 条

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