锂空气电池介孔La_(0.6)Sr_(0.4)Co_(0.8)Fe_(0.2)O_3催化剂的合成与表征  

Synthesis and Characterization of Mesoporous La_(0.6)Sr_(0.4)Co_(0.8)Fe_(0.2)O_3 Catalyst for Lithium-Air Batteries

作　　者：徐亚威 李娟[2] 张哲鸣[2] 吴正斌[2] 谢淑红[1] XU Yawei;LI Juan;ZHANG Zheming;WU Zhengbin;XIE Shuhong(School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105;Electric Vehicle Research and Development Center,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055)

机构地区：[1]湘潭大学材料科学与工程学院,湘潭411105 [2]中国科学院深圳先进技术研究院电动汽车研发中心,深圳518055

出　　处：《材料导报》2017年第A02期35-38,共4页Materials Reports

基　　金：国家自然科学基金(11472236;11627801);深圳市战略新兴产业发展专项资金(CXZZ2015052214086809)

摘　　要：通过溶胶-凝胶法结合模板浸渍法,分别制备了La_(0.6)Sr_(0.4)Co_(0.8)Fe_(0.2)O_3纳米粉末(LSCF)和具有介孔结构的La0.6Sr0.4-Co0.8Fe0.2O3(M-LSCF)粉末,采用比表面积测试及孔径分析仪、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对材料的比表面积、组成和形貌进行了表征,并将其应用在锂空气电池中,测试比较了M-LSCF、LSCF和Super P的电化学性能。测试结果表明实验成功制备了M-LSCF材料,M-LSCF材料的比表面积为142.15 m2/g,远高于LSCF的比表面积(20.17 m2/g)。基于M-LSCF材料的锂空气电池首次放电容量为5 753.33 m Ah/g,可稳定循环31次。In this study,La0.6Sr0.4Co0.8Fe0.2O3(LSCF)powders were synthesized by the sol-gel method and La0.6Sr0.4Co0.8-Fe0.2O3(M-LSCF)powders with mesoporous structure were synthesized by combining the sol-gel with template impregnation met-hod.The specific surface area,structure and morphology were analyzed by BET,XRD,SEM and TEM.For comparison of the electrochemical performance,the M-LSCF,LSCF and Super P were applied in the lithium-air batteries.The results showed that M-LSCF powders were successfully synthesized and the corresponding specific surface area is 142.15 m 2/g,which is much higher than that of LSCF nanoparticles(20.17 m 2/g).The initial discharge capacity of lithium-air battery based on M-LSCF is 5 753.33 mAh/g and the batteries conducted 31 cycles at a fixed capacity of 500 mAh/g.

关 键 词：锂空气电池 溶胶-凝胶法 介孔材料 La0.6Sr0.4Co0.8Fe0.2O3 催化剂 

分 类 号：O646.21[理学—物理化学]