摘要
通过固相法制备Ta掺杂Li_(7)La_(3)Zr_(2)O_(12)(Ta-LLZO)陶瓷,以LiOH为锂源合成Ta-LLZO粉末,并以LiOH为助烧剂制备Ta-LLZO陶瓷,研究了LiOH对Ta-LLZO陶瓷的组织结构和离子电导率的影响。结果表明:以LiOH为锂源可促进立方相Ta-LLZO的生成。同时,以LiOH为助烧剂,可有效促进陶瓷的致密化,在1 200℃烧结5 h可获得致密的立方相Ta-LLZO陶瓷。当助烧剂的添加量为6%(质量分数)时,陶瓷的离子电导率可达6.23×10^(-4)S·cm^(-1)。可见,固相法制备的Li_(7)La_(3)Zr_(2)O_(12)在全固态锂离子电池中具有广阔的应用前景。
Tantalum (Ta) doped Li_(7)La_(3)Zr_(2)O_(12)(Ta-LLZO) ceramics were prepared via conventional solid-state reaction.LiOH was used as a lithium source and a sintering additive for ceramics.The effect of LiOH on the microstructure and ionic conductivity of Ta-LLZO ceramics was investigated.The results show that LiOH as a lithium source can promote the formation of cubic Ta-LLZO,and LiOH as a sintering additive can effectively improve the densification of ceramics.The dense cubic garnet Ta-LLZO ceramics were obtained by sintering at 1 200℃for 5 h.When the amount of the sintering additive is 6%(in mass fraction),the ionic conductivity of ceramics reaches 6.23×10^(-4)S·cm^(-1).It is indicated that Li_(7)La_(3)Zr_(2)O_(12)prepared via solid-state reaction has a great potential in the application of all-solid-state lithium ion batteries.
作者
宋健
张航
薛丽红
张五星
严有为
SONG Jian;ZHANG Hang;XUE Lihong;ZHANG Wuxing;YAN Youwei(State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong Universtiy of Scienc and Technology,Wuhan 430074,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2022年第3期769-774,共6页
Journal of The Chinese Ceramic Society
基金
国家重点研发计划(2016YFB0100302)。
关键词
固体电解质
石榴石型
锂镧锆氧
固相反应
锂离子电导率
solid state electrolyte
garnet-type
lithium lanthanum zirconium oxides
solid state reaction
lithium ion conduction
