Details

Autor(en) / Beteiligte

• Kiyek, Vivien
• Hilger, Martin
• Rosen, Melanie
• Gross, Jürgen Peter
• Mann, Markus
• Fattakhova-Rohlfing, Dina
• Schwaiger, Ruth
• Finsterbusch, Martin
• Guillon, Olivier

Titel

Waste minimization in all-solid-state battery production via re-lithiation of the garnet solid electrolyte LLZO

Ist Teil von

• Journal of power sources, 2024-07, Vol.609, p.234709, Article 234709

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. •Investigation of re-use of production waste of the solid electrolyte Li7La3Zr2O12.•Waste powder and tape loses Li and thus forms a pyrochlore phases.•A new processing route was developed to re-introduce the waste directly.•The performance was shown to be almost identical to freshly synthesized powders.•This approach minimizes waste of critical raw materials in future ASB production.