Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7898195 | Journal of the European Ceramic Society | 2018 | 9 Pages |
Abstract
Garnet structured Al-substituted Li7La3Zr2O12 (Al:LLZO) is a promising candidate as electrolyte in all-solid-state Li-ion batteries due to its chemical stability against Li-metal and high voltage cathode materials. In order to ensure long-term stable operation, electrolyte crack growth induced and/or the volume change of the active material on the cathode side needs to be avoided, requiring in particular knowledge of local and global mechanical properties of the electrolyte material. Micro-pillar splitting test was used for the first time on this material to determine the microscopic fracture toughness of single grains and compare it with conventional Vickers indentation fracture toughness (VIF), which represents macroscopic fracture toughness. Both methods yielded comparative results. In conclusion, the micro-pillar splitting test can be used as an advanced locally resolved characterization method that can open up new experimental directions for characterizing and understanding battery materials and enable a targeted approach for material improvements.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
An-Ni Wang, Juliane Franciele Nonemacher, Gang Yan, Martin Finsterbusch, Jürgen Malzbender, Manja Krüger,