Fracture behavior of solid electrolyte LATP material based on micro-pillar splitting method |
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| Authors: | Gang Yan Jürgen Malzbender Shuo Fu Jürgen Peter Gross Shicheng Yu Rüdiger-A Eichel Ruth Schwaiger |
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| Affiliation: | 1. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), Microstructure and Properties of Materials (IEK-2), 52425, Jülich, Germany;2. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), Fundamental Electrochemistry (IEK-9), 52425, Jülich, Germany;3. Forschungszentrum Jülich GmbH, Helmholtz-Institute Münster: Ionics in Energy Storage (IEK-12), 48149, Münster, Germany;4. RWTH Aachen, Institute of Physical Chemistry, 52074, Aachen, Germany;5. RWTH Aachen University, Chair of Energy Engineering Materials, 52056, Aachen, Germany |
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| Abstract: | The NASICON type solid electrolyte LATP is a promising candidate for all-solid-state Li-ion batteries considering energy density and safety aspects. To ensure the performance and reliability of batteries, crack initiation and propagation within the electrolyte need to be suppressed, which requires knowledge of the fracture characteristics. In the current work, micro-pillar splitting was applied to determine the fracture toughness of LATP material for different grain orientations. The results are compared with data obtained using a conventional Vickers indentation fracture (VIF) approach. The fracture toughness obtained via micro-pillar splitting test is 0.89 ± 0.13 MPa?m1/2, which is comparable to the VIF result, and grain orientation has no significant effect on the intrinsic fracture toughness. Being a brittle ceramic material, the effect of pre-existing defects on the toughness needs to be considered. |
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| Keywords: | Solid state battery Solid electrolyte LATP Fracture toughness Anisotropy Micro-pillar splitting test |
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