Abstract
Solid-state batteries have the potential to replace the current generation of liquid electrolyte batteries. However, the major limitation resulting from their solid-state architecture is the gradual loss of ionic conductivity due to the loss of physical contact between the individual battery components during charging/discharging. This is mainly due to mechanical stresses caused by volume changes in the cathode and anode during lithiation and delithiation. To date, limited research has been devoted to understanding the spatio-temporal distribution of stresses during battery operation. Here, operando scanning high-energy X-ray diffraction to quantify cross-sectional axial stresses with a spatial resolution of 10 µm is used. It is shown how a non-monotonous stress distribution evolves over time during the cycling of the solid-state battery. In addition, degradation of the solid-state electrolyte in the vicinity of the lithium anode is observed and tracked periodic changes in the unit cell volume in the cathode. The presented methodology of tracking the chemo-mechanically induced stresses and interface morphology in real time in correlation with other battery parameters is believed, can provide a valuable platform for the future optimization of solid-state batteries.
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 2307837 |
| Seitenumfang | 7 |
| Fachzeitschrift | Small |
| Jahrgang | 20.2024 |
| Ausgabenummer | 17 |
| DOIs | |
| Publikationsstatus | Veröffentlicht - 3 Dez. 2023 |
Bibliographische Notiz
Funding Information:The authors acknowledge the financial support of projects APVV‐20‐0111, APVV‐19‐0461, APVV‐22‐0132, and VEGA 2/0124/23. This work was performed during the implementation of the project Building‐up Centre for Advanced Materials Application of the Slovak Academy of Sciences, ITMS project code 313021T081, supported by the Research & Innovation Operational Programmed funded by the ERDF. The authors also acknowledge the support of SOLIMEC project (M‐ERA.NET) and MISTI's Global Seed Funds provided by MIT. The authors acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at PETRA III and the authors would like to thank Dr. Norbert Schell for assistance in using the P07b beamline. J.K. and J.T. gratefully acknowledges the financial support under the scope of the COMET program within the K2 Center “Integrated Computational Material, Process and Product Engineering (IC‐MPPE)” (Project No 886385) of Materials Center Leoben Forschung GmbH. A part of this work was funded by the Austrian Federal Government within the COMET research project ASSESS. This work was supported by Österreichische Forschungsförderungsgesellschaft mbH (FFG, project number 895414), through the transnational M‐ERA.NET project “Solimec”. This work was funded from the European Unions's Horizon Europe reserach and innovation program under grant agreement No. 101103834 (OPERA).
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
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