超声波-微波辅助自燃烧法制备LMTO固体电解质材料  

Preparation of LMTO Solid Electrolyte Materials by Ultrasonic-microwave Assisted Self-combustion Method

作　　者：阳杰 张晴 李东 司小强 汪小凤 田长安 YANG Jie;ZHANG Qing;LI Dong;SI Xiao-qiang;WANG Xiao-feng;TIAN Chang-an(School of Energy Materials and Chemical Engineering,Hefei University,Hefei 230601,China;School of Chemistry and Civil Engineering,Shaoguan University,Shaoguan 512005,China)

机构地区：[1]合肥大学能源材料与化工学院,安徽合肥230601 [2]韶关学院化学与土木工程学院,广东韶关512005

出　　处：《稀土》2024年第4期97-102,共6页Chinese Rare Earths

基　　金：国家自然科学基金项目(61804039);教育部产学合作协同育人项目(231006655105108);安徽省高校省级优秀青年人才基金项目(gnyq2022072);安徽省质量工程示范化学实验实训中心项目(2022sysn024);安徽省高校优秀科研创新团队(2022AH010096);合肥学院本科质量工程项目(2022hfujntd04)。

摘　　要：本文采用超声波-微波辅助自燃烧法成功制备Ti^(4+)掺杂改性钼酸镧La_(2)Mo_(2)O_(9)固体电解质La_(2)Mo_(2-x)TixO_(9-δ)(LMTO)材料。LMTO在空气氛围中经过850℃烧结2小时获得陶瓷材料,并通过XRD衍射分析、相对密度、SEM及EIS等表征对样品表面微结构与电化学性能进行检测分析。实验结果表明,烧结活性很好,晶粒大小均匀,晶粒半径在25 nm左右,相对密度均在95%以上;Ti^(4+)掺杂可明显提高LMTO的离子电导率,800℃时,电导率最大值为0.0253 S/cm,活化能低至1.312 eV,其有望被应用于固体氧化物燃料电池的电解质材料中。In this paper,Ti^(4+)-doped La_(2)Mo_(2)O_(9)solid electrolyte La_(2)Mo(2-x)TixO(9-δ)(LMTO)materials were successfully prepared by ultrasonic-microwave assisted self combustion method.LMTO was sintered at 850℃for 2 hours in an air atmosphere to obtain ceramic materials.The surface microstructure and electrochemical properties of the samples were detected and analyzed by XRD,relative density,SEM,and EIS characterization.The experimental results show that the sintering activity is very good,the grain size is uniform,and the grain radius is about 25 nm,and the relative density is more than 95%;Ti^(4+)doping significantly improves the ionic conductivity of LMTO.At 800℃,the maximum conductivity is 0.0253 S/cm,and the activation energy is as low as 1.312 eV,which is expected to be applied to solid-oxide fuel cell electrolyte materials.

关 键 词：固体燃料电池电解质 钼酸镧 超声波-微波辅助 新型氧离子导体 活化能 

分 类 号：TQ174[化学工程—陶瓷工业] O646[化学工程—硅酸盐工业] TB34[理学—物理化学]