Sintering behavior of garnet-type Li7La3Zr2O12-Li3BO3 composite solid electrolytes for all-solid-state lithium batteries

Ran Hee Shin, Sam Ick Son, Yoon Soo Han, Young Do Kim, Hyung Tae Kim, Sung Soo Ryu, Wei Pan

Research output: Contribution to journalArticle

9 Citations (Scopus)

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 wt% Li3BO3 composite sintered for 8 h at 1100 °C was 86.4% of the theoretical density, whereas the ionic conductivity was 1.94 × 10− 5 S cm− 1.

Original languageEnglish
Pages (from-to)10-14
Number of pages5
JournalSolid State Ionics
Volume301
DOIs
StatePublished - 2017 Mar 1

Fingerprint

Lithium batteries
lithium batteries
Solid electrolytes
Garnets
solid electrolytes
garnets
sintering
Sintering
solid state
composite materials
Composite materials
shrinkage
Powders
wetting
Wetting
glass
Glass
dilatometry
Glass ceramics
Ionic conductivity

Keywords

  • All-solid-state battery
  • Ion conductivity
  • Lithium garnet electrolytes
  • Lithium oxide additives
  • Sintering additive

Cite this

Shin, Ran Hee ; Son, Sam Ick ; Han, Yoon Soo ; Kim, Young Do ; Kim, Hyung Tae ; Ryu, Sung Soo ; Pan, Wei. / Sintering behavior of garnet-type Li7La3Zr2O12-Li3BO3 composite solid electrolytes for all-solid-state lithium batteries. In: Solid State Ionics. 2017 ; Vol. 301. pp. 10-14.
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Sintering behavior of garnet-type Li7La3Zr2O12-Li3BO3 composite solid electrolytes for all-solid-state lithium batteries. / Shin, Ran Hee; Son, Sam Ick; Han, Yoon Soo; Kim, Young Do; Kim, Hyung Tae; Ryu, Sung Soo; Pan, Wei.

In: Solid State Ionics, Vol. 301, 01.03.2017, p. 10-14.

Research output: Contribution to journalArticle

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T1 - Sintering behavior of garnet-type Li7La3Zr2O12-Li3BO3 composite solid electrolytes for all-solid-state lithium batteries

AU - Shin, Ran Hee

AU - Son, Sam Ick

AU - Han, Yoon Soo

AU - Kim, Young Do

AU - Kim, Hyung Tae

AU - Ryu, Sung Soo

AU - Pan, Wei

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AB - 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 wt% Li3BO3 composite sintered for 8 h at 1100 °C was 86.4% of the theoretical density, whereas the ionic conductivity was 1.94 × 10− 5 S cm− 1.

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KW - Ion conductivity

KW - Lithium garnet electrolytes

KW - Lithium oxide additives

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