Lithium Metal Penetration Induced by Electrodeposition through Solid Electrolytes: Example in Single-Crystal Li6La3ZrTaO12Garnet
| العنوان: | Lithium Metal Penetration Induced by Electrodeposition through Solid Electrolytes: Example in Single-Crystal Li6La3ZrTaO12Garnet |
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| المؤلفون: | Brian W. Sheldon, Tushar Swamy, Daniel Rettenwander, Stefan Berendts, Richard J.-Y. Park, Reinhard Uecker, W. Craig Carter, Lukas Porz, Yet-Ming Chiang |
| المصدر: | Journal of The Electrochemical Society. 165:A3648-A3655 |
| بيانات النشر: | The Electrochemical Society, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Materials science, Renewable Energy, Sustainability and the Environment, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Anode, Electrode, Materials Chemistry, Electrochemistry, Fast ion conductor, Grain boundary, Composite material, 0210 nano-technology, Current density, Single crystal, Faraday efficiency |
| الوصف: | Solid electrolytes potentially enable rechargeable batteries with lithium metal anodes possessing higher energy densities than today's lithium ion batteries. To do so the solid electrolyte must suppress instabilities that lead to poor coulombic efficiency and short circuits. In this work, lithium electrodeposition was performed on single-crystal Li6La3ZrTaO12 garnets to investigate factors governing lithium penetration through brittle electrolytes. In single crystals, grain boundaries are excluded as paths for lithium metal propagation. Vickers microindentation was used to introduce surface flaws of known size. However, operando optical microscopy revealed that lithium metal penetration propagates preferentially from a different, second class of flaws. At the perimeter of surface current collectors smaller in size than the lithium source electrode, an enhanced electrodeposition current density causes lithium filled cracks to initiate and grow to penetration, even when large Vickers defects are in proximity. Modeling the electric field distribution in the experimental cell revealed that a 5-fold enhancement in field occurs within 10 micrometers of the electrode edge and generates high local electrochemomechanical stress. This may determine the initiation sites for lithium propagation, overriding the presence of larger defects elsewhere. |
| تدمد: | 1945-7111 0013-4651 |
| DOI: | 10.1149/2.1391814jes |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::150cc751642db7aa120daec71b2f452b https://doi.org/10.1149/2.1391814jes |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........150cc751642db7aa120daec71b2f452b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19457111 00134651 |
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| DOI: | 10.1149/2.1391814jes |