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Sintering, micro-structure and Li+ conductivity of Li7-xLa3Zr2-xNbxO12/MgO (x=0.2-0.7) Li-Garnet composite ceramics
Huang, Xiao; Song, Zhen; Xiu, Tongping; Badding, Michael E.; Wen, Zhaoyin
2019-01-30
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume45Issue:1Pages:56
SubtypeArticle
AbstractNb-doped Li7La3Zr2O12 (Nb-LLZO) is one of the promising electrolyte candidates in the Li-Garnet family due to its high Li-ion conductivity. The sintered Nb-LLZO ceramics, however, often exhibit abnormal grain growth with high porosity and poor mechanical properties. For advantaged electrochemical and mechanical properties, a uniform and dense microstructure is desired. In this research, MgO has been added as a secondary phase to inhibit abnormal grain growth in Nb-LLZO. The sintering process of the Nb-LLZO/MgO composite ceramics has been studied for different Nb doping levels (0.2-0.7 pfu) at sintering conditions of 1250 degrees C for 1-360 min. The ceramic density, microstructure, and Li-ion conductivity are reported. The composite ceramics have shown a very fast sintering speed. At 1250 degrees C, the 0.4Nb-LLZO/MgO composite can be well-sintered in 1 min. For sintering at 1250 degrees C for 40 min, ceramic samples showing relative density of 97%, conductivity of 6 x 10(-4) S cm(-1) at 25 degrees C, and activation energy of 0.40 eV are obtained.
KeywordLi-Garnet c-LLZO Solid electrolyte Nb-doping High conductivity Sintering
DOI10.1016/j.ceramint.2018.09.133
WOS KeywordHIGH IONIC-CONDUCTIVITY ; DOPED LI7LA3ZR2O12 ; CRYSTAL-STRUCTURE ; ELECTROCHEMICAL PROPERTIES ; NB ; SUBSTITUTION ; LI5LA3NB2O12 ; STABILITY ; AL ; ELECTROLYTES
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27568
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Huang, Xiao,Song, Zhen,Xiu, Tongping,et al. Sintering, micro-structure and Li+ conductivity of Li7-xLa3Zr2-xNbxO12/MgO (x=0.2-0.7) Li-Garnet composite ceramics[J]. CERAMICS INTERNATIONAL,2019,45(1):56.
APA Huang, Xiao,Song, Zhen,Xiu, Tongping,Badding, Michael E.,&Wen, Zhaoyin.(2019).Sintering, micro-structure and Li+ conductivity of Li7-xLa3Zr2-xNbxO12/MgO (x=0.2-0.7) Li-Garnet composite ceramics.CERAMICS INTERNATIONAL,45(1),56.
MLA Huang, Xiao,et al."Sintering, micro-structure and Li+ conductivity of Li7-xLa3Zr2-xNbxO12/MgO (x=0.2-0.7) Li-Garnet composite ceramics".CERAMICS INTERNATIONAL 45.1(2019):56.
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