纳米ScSZ基电解质中低温导电性研究进展  

Research progress of conductivity of nano ScSZ-based electrolyte at medium and low temperature

作　　者：梁天权 郭燕[1] 陈锡勇 詹峰 张修海[1,2] 曾建民 Liang Tianquan;Guo Yan;Chen Xiyong;Zhan Feng;Zhang Xiuhai;Zeng Jianmin(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials;Center of Ecological Collaborative Innovation for Aluminum Industry in Guangxi)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]广西大学广西有色金属及特色材料加工重点实验室 [3]广西大学广西生态型铝产业协同创新中心

出　　处：《无机盐工业》2021年第6期87-94,共8页Inorganic Chemicals Industry

基　　金：国家自然科学基金(52061004,5206002);广西自然科学基金(2019GXNSFAA245005,2018GXNSFAA281176);中信大锰-广西大学研发项目(ZXDM-YF-05);广西高等学校千骨干教师培育计划资助项目(第一期)。

摘　　要：固体氧化物燃料电池(SOFC)适用于多种燃料气体,高效清洁,是最有前景的燃料电池之一。氧化钪(Sc2O3)掺杂二氧化锆(ZrO2)系列(ScSZ)使氧化锆基电解质表现出优异的离子导电性。ScSZ基电解质晶粒纳米化呈现出了很好的电学性能而得到广泛深入的研究。但是ScSZ基电解质在中低温下会发生相变,产生低导电性的菱形相而影响其离子电导率。系统总结了单元或二元氧化物掺杂ScSZ电解质在中低温下的物相、晶体结构及电导率。多元氧化物复合掺杂ScSZ可有效防止在中低温下发生相变、稳定立方相ScSZ。采用不同方法制备纳米ScSZ基电解质,可很好地提高电解质的电导率。提出了ScSZ系列在中低温范围内(600~800℃)的发展方向:优化掺杂成分和掺杂量提高晶粒晶界电导率,使用不同工艺制备纳米电解质或不同制备方法制备新型结构电解质材料。Solid oxide fuel cell(SOFC)is one of the most promising fuel cells,which is efficient and clean and suitable for a variety of fuel gases.Sc2O3 doped ZrO2(ScSZ)series(including single or binary oxides doped ScSZ)makes zirconia-based electrolyte shows excellent ionic conductivity.The nano-crystallization of ScSZ-based electrolyte has been widely studied due to its excellent electrical properties.However,ScSZ-based electrolyte will undergo phase transition at medium and low temperature,resulting in rhombic phase with low conductivity,which affects its ionic conductivity.ScSZ electrolytes doped with single or binary oxides were systematically summarized.The results showed that multi-oxides doped ScSZ could effectively prevent from phase transformation at medium and low temperatures,stabilize cubic ScSZ.Nano-crystallization ScSZ based electrolytes prepared by different methods could improve the ionic conductivity very well.The development direction of ScSZ series in medium and low temperature(600~800℃)was proposed:the conductivity of grain and grain boundary could be improved through optimizing the doped composition,nano-crystallization and electrolyte materials with novel structures could be prepared by different preparation methods and parameters.

关 键 词：ScSZ基电解质 氧化钪 二氧化锆 电导率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]