溶胶-凝胶法低温制备Ce0.8Sm0.2O2-α及其复合电解质的中温燃料电池性能

doi:10.16085/j.issn.1000-6613.2016-2030

化工进展 ›› 2017, Vol. 36 ›› Issue (09): 3395-3399.DOI: 10.16085/j.issn.1000-6613.2016-2030

溶胶-凝胶法低温制备Ce_0.8Sm_0.2O_2-α及其复合电解质的中温燃料电池性能

管清梅, 王洪涛

阜阳师范学院化学与材料工程学院, 安徽环境污染物降解与监测省级重点实验室, 安徽阜阳 236037

收稿日期:2016-11-07 修回日期:2017-05-16 出版日期:2017-09-05 发布日期:2017-09-05
通讯作者: 王洪涛,教授,硕士生导师,主要从事电化学和材料化学研究。
作者简介:管清梅(1978-),女,副教授,主要从事物理化学和材料化学研究。E-mail:flyssky@163.com
基金资助:
国家自然科学基金青年项目（51402052）及安徽省高等学校自然科学基金项目（2015KJ010）。

Ce_0.8Sm_0.2O_2-α ceramic prepared by sol-gel method at low temperature and its composite electrolyte in intermediate temperature fuel cells

GUAN Qingmei, WANG Hongtao

Anhui Provincial Key Laboratory for Degradation and Monitoring of Pollution of the Environment, School of Chemical and Material Engineering, Fuyang Teachers College, Fuyang 236037, Anhui, China

Received:2016-11-07 Revised:2017-05-16 Online:2017-09-05 Published:2017-09-05

摘要/Abstract

摘要： 以三氧化二钐、浓硝酸、硝酸铈铵、柠檬酸为原料，采用溶胶-凝胶法低温（900℃）制备Ce_0.8Sm_0.2O_2-α（SDC），低于通常高温烧结温度（1400℃），并与（Li/K）₂CO₃共熔体进行复合。采用DSC-TGA确定制备Ce_0.8Sm_0.2O_2-α的烧结温度。XRD结果表明，（Li/K）₂CO₃与Ce_0.8Sm_0.2O_2-α复合后没有发生化学反应。SEM图像表明，SDC粒径均匀一致，（Li/K）₂CO₃作为SDC颗粒黏结剂均匀覆盖SDC颗粒表面。采用电化学工作站研究了复合电解质在400~600℃下干燥氮气气氛中的电导率。结果表明，温度为600℃时，复合电解质在干燥氮气气氛中的电导率达到最大值3.3×10^-2S/cm，高于单一二氧化铈材料在相同条件下的电导率。氧分压与电导率关系曲线表明，复合电解质具有良好的氧离子导电性。H₂/O₂燃料电池性能测试表明复合电解质Ce_0.8Sm_0.2O_2-α-（Li/K）₂CO₃（SDC-SG-LK）在600℃开路条件下的电解质阻抗、极化阻抗分别为3.13Ω·cm²、0.81Ω·cm²，最大输出功率密度为130mW/cm²。

关键词: 二氧化铈, 复合材料, 电解质, 氢, 燃料电池, 电导率

Abstract: Ce_0.8Sm_0.2O_2-α was synthesized by sol-gel method at 900℃ using Sm₂O₃,HNO₃,(NH₄)₂Ce(NO₃)₆,citric acid as raw materials and then compounded with (Li/K)₂CO₃. The preparation temperature(900℃)is much lower than conventional sintering temperature(1400℃). The sintering temperature of Ce_0.8Sm_0.2O_2-α(SDC) was determined by DSC-TGA. The XRD results showed that there was no reactions between Ce_0.8Sm_0.2O_2-α and (Li/K)₂CO₃. The SEM examinations revealed that the SDC particle size is uniform,and the surface is uniformly covered by (Li/K)₂CO₃ that act as the SDC particle binder. The conductivity of the composite electrolyte in dry nitrogen was measured using electrochemical analyzer. The highest conductivity was 3.3×10^-2S/cm at 600℃,which is higher than that of single CeO₂ material. The H₂/O₂ fuel cell by the composite electrolyte showed that the electrolyte impedance and polarization impedance under open-circuit condition were 3.13Ω·cm² and 0.81Ω·cm²,respectively,and generated the maximum power density of 130mW/cm² at 600℃.

Key words: cerium oxide (CeO₂), composites, electrolytes, hydrogen, fuel cells, conductivity

中图分类号:

管清梅, 王洪涛. 溶胶-凝胶法低温制备Ce_0.8Sm_0.2O_2-α及其复合电解质的中温燃料电池性能[J]. 化工进展, 2017, 36(09): 3395-3399.

GUAN Qingmei, WANG Hongtao. Ce_0.8Sm_0.2O_2-α ceramic prepared by sol-gel method at low temperature and its composite electrolyte in intermediate temperature fuel cells[J]. Chemical Industry and Engineering Progress, 2017, 36(09): 3395-3399.

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溶胶-凝胶法低温制备Ce_0.8Sm_0.2O_2-α及其复合电解质的中温燃料电池性能

Ce_0.8Sm_0.2O_2-α ceramic prepared by sol-gel method at low temperature and its composite electrolyte in intermediate temperature fuel cells

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溶胶-凝胶法低温制备Ce0.8Sm0.2O2-α及其复合电解质的中温燃料电池性能

Ce0.8Sm0.2O2-α ceramic prepared by sol-gel method at low temperature and its composite electrolyte in intermediate temperature fuel cells

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溶胶-凝胶法低温制备Ce_0.8Sm_0.2O_2-α及其复合电解质的中温燃料电池性能

Ce_0.8Sm_0.2O_2-α ceramic prepared by sol-gel method at low temperature and its composite electrolyte in intermediate temperature fuel cells