A novel Gd3+ and Yb3+ co-doped ceria-sulphate composite electrolyte for intermediate-temperature fuel cells

被引：9
|
作者：
Wang, Hongtao [1 ]
Hu, Tianhui [1 ]
Xi, Guangcheng [2 ]
机构：
[1] Fuyang Normal Univ, Sch Chem & Mat Engn, Anhui Prov Key Lab Degradat & Monitoring Pollut E, Fuyang 236037, Peoples R China
[2] Chinese Acad Inspect & Quarantine, Beijing 100176, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2020年 / 46卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Composite; Electrolyte; Fuel cell; CeO2; Conductivity; ELECTROCHEMICAL PERFORMANCE; IONIC-CONDUCTIVITY; PROTON; CEO2; NANOCOMPOSITE; LANTHANUM; STRONTIUM; ERBIUM;
D O I：
10.1016/j.ceramint.2019.12.104
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, Yb3+ and Gd3+ co-doped CeO2 and the corresponding (Li/K)(2)SO4 composite electrolyte were prepared. The structures and morphologies of Ce0.8Yb0.1Gd0.1O2-alpha and Ce0.8Yb0.1Gd0.1O2-alpha-Li2SO4-K2SO4 were investigated using X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM). The conductivity of Ce0.8Yb0.1Gd0.1O2-alpha (1550 degrees C) as a function of time during humidification in a nitrogen atmosphere at 700 degrees C was investigated. The log(aT) vs. 1000T(-1) plots, loga vs. log(pO(2)) curves, and fuel cell performances of Ce0.8Yb0.1Gd0.1O2-alpha (1550 degrees C) and Ce0.8Yb0.1Gd0.1O2-alpha -Li2SO4-K2SO4 (1550 degrees C) were investigated. At 700 degrees C, Ce0.8Yb0.1Gd0.1O2-alpha-Li2SO4-K2SO4 (1550 degrees C) showed a power density of 197 mW cm(-2), which is five times higher than that of Ce0.8Yb0.1Gd0.1O2-alpha (1550 degrees C).
引用
收藏
页码：8695 / 8699
页数：5
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