Showing papers by "Martin Finsterbusch published in 2020"
TL;DR: In this article, a green, water-based tape-casting process for solid-state Li7La3Zr2O12 (LLZ) oxide-based solid electrolyte (SE) was proposed.
21 citations
17 Nov 2020
TL;DR: In this article, a recycling route based on inert shredding, a subsequent thermal treatment, and a sorting step is suggested, and transferring the extracted black mass to a dedicated hydrometallurgical recycling process is proposed.
Abstract: In the coming years, the demand for safe electrical energy storage devices with high energy density will increase drastically due to the electrification of the transportation sector and the need for stationary storage for renewable energies. Advanced battery concepts like all-solid-state batteries (ASBs) are considered one of the most promising candidates for future energy storage technologies. They offer several advantages over conventional Lithium-Ion Batteries (LIBs), especially with regard to stability, safety, and energy density. Hardly any recycling studies have been conducted, yet, but such examinations will play an important role when considering raw materials supply, sustainability of battery systems, CO2 footprint, and general strive towards a circular economy. Although different methods for recycling LIBs are already available, the transferability to ASBs is not straightforward due to differences in used materials and fabrication technologies, even if the chemistry does not change (e.g., Li-intercalation cathodes). Challenges in terms of the ceramic nature of the cell components and thus the necessity for specific recycling strategies are investigated here for the first time. As a major result, a recycling route based on inert shredding, a subsequent thermal treatment, and a sorting step is suggested, and transferring the extracted black mass to a dedicated hydrometallurgical recycling process is proposed. The hydrometallurgical approach is split into two scenarios differing in terms of solubility of the ASB-battery components. Hence, developing a full recycling concept is reached by this study, which will be experimentally examined in future research.
19 citations
TL;DR: In this paper, an advanced pillar splitting method was used to determine the fracture toughness of a garnet-type Li7La3Zr2O12 (LLZO) electrolyte.
Abstract: In the present study an advanced pillar splitting method is used to determine the fracture toughness of a garnet-type Li7La3Zr2O12 (LLZO) electrolyte. The obtained results are compared to data derived on the basis of conventional Vickers indentation. Furthermore, potential micro-pillar size effects are investigated. The estimated fracture toughness values for single grains and polycrystalline LLZO material obtained via both methods are in good agreement, yielding ∼ 1 MPa m0.5, hence the data indicate that LLZO exhibits relatively low fracture toughness and has a brittle behavior.
15 citations
4 citations
Patent•
14 May 2020
TL;DR: In this article, the surface of the electrode or of the power collector comprises a plurality of blind hole-like recesses, which are spaced apart from each other, the surface structured in this way being coated with a solid polymer electrolyte, the recesses being filled with the solids.
Abstract: The invention relates to a metal electrode or current collector for an energy store, wherein the surface of the electrode or of the power collector comprises a plurality of blind hole-like recesses, which are spaced apart from each other, the surface structured in this way being coated with a solid polymer electrolyte, the recesses being filled with the solid polymer electrolyte. The invention further relates to a primary or secondary energy store comprising same.
1 citations