Fabrication of high-density and translucent Al-containing garnet, Li7-xLa3Zr2-xTaxO12 (LLZTO) solid-state electrolyte by pressure filtration and sintering
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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DOI：
10.1016/j.ssi.2021.115640
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发表时间：
2021-04-28
影响因子：
3.2
通讯作者：
Virkar, Anil V.
中科院分区：
文献类型：
--
作者：
Lei, Chong;Shetty, Dinesh K.;Virkar, Anil V.
石榴石型LLZTO陶瓷氧化物具有良好的化学稳定性和机械强度，是一种很有前途的锂离子电池固体电解质。然而，锂枝晶生长仍然需要解决。固体电解质的不透明性阻碍了枝晶生长的原位研究。因此，需要具有高密度的半透明LLZTO。石榴石型LLZTO的传统制造工艺繁琐，并且难以制造具有高透明度的致密LLZTO盘。本文采用固相反应法制备了Al-LLZTO粉末。开发了一种湿陶瓷加工方法，即加压过滤然后烧结，以制备具有高离子电导率（1.47 × 10（-4）S/cm）和对500至800 nm的可见光具有足够透射率（17-23%）的致密LLZTO，以观察和监测枝晶生长。
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. 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 x 10(-4) S/cm) and adequate transmittance (17-23%) to visible light from 500 to 800 nm to observe and monitor dendrite growth.