Sintering behavior of garnet-type Li₇La₃Zr₂O₁₂-Li₃BO₃ composite solid electrolytes for all-solid-state lithium batteries
- Authors
- Shin, Ran-Hee; Son, Sam Ick; Han, Yoon Soo; Kim, Young Do; Kim, Hyung-Tae; Ryu, Sung-Soo; Pan, Wei
- Issue Date
- Mar-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- All-solid-state battery; Lithium garnet electrolytes; Sintering additive; Lithium oxide additives; Ion conductivity
- Citation
- SOLID STATE IONICS, v.301, pp.10 - 14
- Indexed
- SCIE
SCOPUS
- Journal Title
- SOLID STATE IONICS
- Volume
- 301
- Start Page
- 10
- End Page
- 14
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/20509
- DOI
- 10.1016/j.ssi.2017.01.005
- ISSN
- 0167-2738
- Abstract
- In this study, Li₃BO₃ glass ceramic was utilized as a sintering additive for producing garnet-type Li₇La₃Zr₂O₁₂ solid electrolytes by low temperature sintering. The shrinkage and wetting behaviors of the Li₇La₃Zr₂O₁₂-Li₃BO₃ composite powder during heating were analyzed by dilatometry. The sintering shrinkage of the Li₇La₃Zr₂O₁₂-Li₃BO₃ composite powder occurred in two stages and was related to the densification of the composite. It was also closely related to the wetting behavior of the Li₃BO₃ glass. The sintering of Li₇La₃Zr₂O₁₂-Li₃BO₃ from around 700 °C is driven by the viscous sintering of Li₃BO₃ glass, while sintering above 850 °C is due to particle rearrangement in Li₇La₃Zr₂O₁₂ as well as the solid-state sintering of Li₇La₃Zr₂O₁₂ after the melting of Li₃BO₃. The density of the Li₇La₃Zr₂O₁₂-8 w Li₃BO₃ composite sintered for 8 hat 1100 °C was 86.4% of the theoretical density, whereas the ionic conductivity was 1.94 x 10⁻⁵ S cm⁻¹.
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