[1][2] LLZO has a high ionic conductivity and thermal and chemical stability against reactions with prospective electrode materials, mainly lithium metal, giving it an advantage for use as an electrolyte in solid-state batteries.
The fact that the total and bulk conductivities are of the same order of magnitude distinguishes LLZO garnet-type oxide as particularly attractive when compared to other ceramic lithium-ion conductors.
This suggests that LLZO, with its garnet-like structure, holds significant promise for enhancing the performance of solid-state lithium-ion rechargeable batteries.
[4] Since oxygen, zirconium, and lanthanum in LLZO are rigidly bound in the framework of the garnet-like structure,[5] their mobility will be negligible at operating temperatures and, hence, the ionic motion is due to the transport of Li+ ions.
The enhanced lithium ion conductivity and reduced activation energy observed in LLZO, compared to other lithium-containing garnets, can be attributed to several factors.