%0 Journal Article
%A Kiyek, Vivien
%A Hilger, Martin
%A Rosen, Melanie
%A Gross, Jürgen Peter
%A Mann, Markus
%A Fattakhova-Rohlfing, Dina
%A Schwaiger, Ruth
%A Finsterbusch, Martin
%A Guillon, Olivier
%T Waste minimization in all-solid-state battery production via re-lithiation of the garnet solid electrolyte LLZO
%J Journal of power sources
%V 609
%@ 0378-7753
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2024-04891
%P 234709 -
%D 2024
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001266916100001
%R 10.1016/j.jpowsour.2024.234709
%U https://juser.fz-juelich.de/record/1028951