LSMW-LAO复合固体电解质的制备及其离子导电性能  

Preparation and ionic conductivity of LSMW-LAO composite solid electrolyte

作　　者：阳杰 蒋庆涛 储鹤 郭昊杰 冯可欣 YANG Jie;JIANG Qingtao;CHU He;GUO Haojie;FENG Kexin(School of Energy Materials and Chemical Engineering,Hefei University,Hefei 230601,Anhui,China)

机构地区：[1]合肥大学能源材料与化工学院,安徽合肥230601

出　　处：《云南大学学报(自然科学版)》2025年第2期340-345,共6页Journal of Yunnan University(Natural Sciences Edition)

基　　金：安徽省高校省级优秀青年人才基金(gxyq2022072);安徽省级质量工程示范化学实验实训中心项目(2022sysx024);合肥学院本科质量工程项目:化学实验教学团队(2022hfujxtd04);教育部产学合作协同育人项目(231006655105108);安徽省高校优秀科研创新团队(2022AH010096)。

摘　　要：采用固相法制备La_(1.7)Sm_(0.3)Mo_(1.8)W_(0.2)O_(9-δ)与LaAlO_(3)摩尔比分别为10∶0、9∶1、8∶2、7∶3、6∶4、5∶5的复合电解质L_(a1.7)Sm_(0.3)Mo_(1.8)W_(0.2)O_(9-δ)(LSMW)-LaAlO_(3)(LAO),研究LSMW-LAO复合电解质的微观形貌特性和离子导电性能.实验结果表明,复合电解质在850℃下烧结3 h,其相对密度均在95%以上,烧结收缩率均低于3%,烧结活性较高;LSMW-LAO复合电解质离子电导率随着LAO用量的增加而降低;在800℃下,LSMW-LAO复合电解质LSMW、LAO两相摩尔质量比9∶1时,复合电解质离子电导率最大,达到0.0341 S·cm^(-1),活化能为1.323 eV.其有望成为具有产业化应用前景的固体电解质.The composite electrolyte La_(1.7)Sm_(0.3)Mo_(1.8)W_(0.2)O_(9-δ)(LSMW)-LaAlO_(3)(LAO)was prepared by solid-state method with a molar ratio of 10∶0,9∶1,8∶2,7∶3,6∶4,and 5∶5,respectively.The microstructure andion conductivity of LSMW-LAO composite electrolyte were studied.The experimental results show that whensintered at 850℃for 3 hours,the relative density of the composite electrolyte is above 95%,and the sinteringshrinkage rate is below 3%,indicating high sintering activity.The ion conductivity of LSMW-LAO compositeelectrolyte decreases with the increase of LAO dosage.At 800℃,when the molar mass ratio of LSMW and LAOphases is 9∶1,the composite electrolyte has the highest ion conductivity,reaching 0.0341 S·cm^(-1)and anactivation energy of 1.323 eV.It is expected to become a solid electrolyte with industrial application prospects.

关 键 词：固体电解质 相对密度 固相法 复合电解质 离子导电率 

分 类 号：TB34[一般工业技术—材料科学与工程] Q646[生物学—生物物理学]