TY  - JOUR
AU  - Kiyek, Vivien
AU  - Hilger, Martin
AU  - Rosen, Melanie
AU  - Gross, Jürgen Peter
AU  - Mann, Markus
AU  - Fattakhova-Rohlfing, Dina
AU  - Schwaiger, Ruth
AU  - Finsterbusch, Martin
AU  - Guillon, Olivier
TI  - Waste minimization in all-solid-state battery production via re-lithiation of the garnet solid electrolyte LLZO
JO  - Journal of power sources
VL  - 609
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2024-04891
SP  - 234709 -
PY  - 2024
AB  - Oxide-ceramic based electrolytes such as Li7La3Zr2O12 (LLZO), are one of the most promising solid electrolytes for application in all-solid-state batteries. However, most of its constituents are listed as critical raw materials, highlighting the need to minimize waste during synthesis and processing. Therefore, we investigated the re-use of aged LLZO powder and aged LLZO green foils produced by tape-casting, an industrial processing route suitable for ASSBs. We established a new synthesis route to fully recovery Li-poor LLZO and pyrochlore phase La2Zr2O7 by simply adding a Li source during firing. By using recycled LLZO powder in a <200 μm thick cast tape, we were able to prove a similar ionic conductivity of 2.1 × 10−4 S cm−1 at room temperature and a critical current density of 0.75 mA cm−2 at 60 °C compared to fresh powder. This simple and efficient re-synthesis strategy might hold the potential to minimize waste streams of critical raw materials in future industrial production processes of solid-state batteries.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001266916100001
DO  - DOI:10.1016/j.jpowsour.2024.234709
UR  - https://juser.fz-juelich.de/record/1028951
ER  -