Fabrication of high-density and translucent Al-containing garnet, Li7–xLa3Zr2–xTaxO12 (LLZTO) solid-state electrolyte by pressure filtration and sintering

Lei, Chong; Shetty, Dinesh K.; Simpson, Michael F.; Virkar, Anil V.

doi:10.1016/j.ssi.2021.115640

Title: Fabrication of high-density and translucent Al-containing garnet, Li_7–xLa₃Zr_2–xTa_xO₁₂ (LLZTO) solid-state electrolyte by pressure filtration and sintering

Journal Article · Wed Apr 28 00:00:00 EDT 2021 · Solid State Ionics

DOI:https://doi.org/10.1016/j.ssi.2021.115640· OSTI ID:1865161

Lei, Chong ^[1]; Shetty, Dinesh K. ^[1]; Simpson, Michael F. ^[1]; Virkar, Anil V. ^[1]

Univ. of Utah, Salt Lake City, UT (United States)

Garnet type LLZTO ceramic oxide is a promising solid-state electrolyte for use in Li-ion batteries because it has good chemical stability, adequate mechanical strength. However, lithium dendrite growth still needs to be addressed. The opacity of the solid electrolyte hinders in-situ investigation of dendrite growth. Therefore, semi-transparent LLZTO with high-density is needed. Here, the traditional fabrication process for the garnet type LLZTO is cumbersome, and dense LLZTO disks with high transparency are difficult to fabricate. In this work, Al-LLZTO powder was made by solid-state reaction. A wet ceramic processing method, pressure filtration followed by sintering, was developed to make dense LLZTO with high ionic conductivity (1.47 × 10^–4 S/cm) and adequate transmittance (17–23%) to visible light from 500 to 800 nm to observe and monitor dendrite growth.

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Research Organization:: Univ. of Utah, Salt Lake City, UT (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-03ER46086

OSTI ID:: 1865161

Alternate ID(s):: OSTI ID: 1780345

Journal Information:: Solid State Ionics, Vol. 364; ISSN 0167-2738

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Fabrication of high-density and translucent Al-containing garnet, Li7–xLa3Zr2–xTaxO12 (LLZTO) solid-state electrolyte by pressure filtration and sintering

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Title: Fabrication of high-density and translucent Al-containing garnet, Li_7–xLa₃Zr_2–xTa_xO₁₂ (LLZTO) solid-state electrolyte by pressure filtration and sintering