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Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12
Dong, Zhencai; Xu, Chao; Wu, Yongmin; Tang, Weiping; Song, Shufeng; Yao, Jianyao; Huang, Zhengyong; Wen, Zhaoyin; Lu, Li; Hu, Ning
2019-05-01
Source PublicationNANOMATERIALS
ISSN2079-4991
Volume9Issue:5
SubtypeArticle
AbstractGarnet Li7La3Zr2O12 is one of the most promising solid electrolytes used for solid-state lithium batteries. However, low ionic conductivity impedes its application. Herein, we report Ta-doping garnets with compositions of Li7-xLa3Zr2-xTaxO12 (0.1 <= x <= 0.75) obtained by solid-state reaction and free sintering, which was facilitated by graphene oxide (GO). Furthermore, to optimize Li6.6La3Zr1.6Ta0.4O12, Mg2+ was select as a second dopant. The dual substitution of Ta5+ for Zr4+ and Mg2+ for Li+ with a composition of Li6.5Mg0.05La3Zr1.6Ta0.4O12 showed an enhanced total ionic conductivity of 6.1 x 10(-4) S cm(-1) at room temperature. Additionally, spark plasma sintering (SPS) was applied to further densify the garnets and enhance their ionic conductivities. Both SPS specimens present higher conductivities than those produced by the conventional free sintering. At room temperature, the highest ionic conductivity of Li6.5Mg0.05La3Zr1.6Ta0.4O12 sintered at 1000 degrees C is 8.8 x 10(-4) S cm(-1), and that of Li6.6La3Zr1.6Ta0.4O12 sintered at 1050 degrees C is 1.18 x 10(-3) S cm(-1).
Keywordgarnet dual substitution spark plasma sintering conductivity
DOI10.3390/nano9050721
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science
PublisherMDPI
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27127
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Dong, Zhencai,Xu, Chao,Wu, Yongmin,et al. Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12[J]. NANOMATERIALS,2019,9(5).
APA Dong, Zhencai.,Xu, Chao.,Wu, Yongmin.,Tang, Weiping.,Song, Shufeng.,...&Hu, Ning.(2019).Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12.NANOMATERIALS,9(5).
MLA Dong, Zhencai,et al."Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12".NANOMATERIALS 9.5(2019).
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