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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mitlin, David
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2024Dendrite Growth—Microstructure—Stress—Interrelations in Garnet Solid‐State Electrolytecitations
- 2024Alumina - Stabilized SEI and CEI in Potassium Metal Batteries.citations
- 2024Mechanical Milling – Induced Microstructure Changes in Argyrodite LPSCl Solid‐State Electrolyte Critically Affect Electrochemical Stabilitycitations
- 2023Tuned Reactivity at the Lithium Metal–Argyrodite Solid State Electrolyte Interphasecitations
- 2022Stable Anode-Free All-Solid-State Lithium Battery through Tuned Metal Wetting on the Copper Current Collectorcitations
- 2021A Sodium-Antimony-Telluride Intermetallic Allows Sodium-Metal Cycling at 100% Depth of Discharge and as an Anode-Free Metal Batterycitations
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article
Dendrite Growth—Microstructure—Stress—Interrelations in Garnet Solid‐State Electrolyte
Abstract
<jats:title>Abstract</jats:title><jats:p>This study illustrates how the microstructure of garnet solid‐state electrolytes (SSE) affects the stress‐state and dendrite growth. Tantalum‐doped lithium lanthanum zirconium oxide (LLZTO, Li<jats:sub>6.4</jats:sub>La<jats:sub>3</jats:sub>Zr<jats:sub>1.4</jats:sub>Ta<jats:sub>0.6</jats:sub>O<jats:sub>12</jats:sub>) is synthesized by powder processing and sintering (AS), or with the incorporation of intermediate‐stage high‐energy milling (M). The M compact displays higher density (91.5% vs 82.5% of theoretical), and per quantitative stereology, lower average grain size (5.4 ± 2.6 vs 21.3 ± 11.1 µm) and lower AFM‐derived RMS surface roughness contacting the Li metal (45 vs 161 nm). These differences enable symmetric M cells to electrochemically cycle at constant capacity (0.1 mAh cm<jats:sup>−2</jats:sup>) with enhanced critical current density (CCD) of 1.4 versus 0.3 mA cm<jats:sup>−2</jats:sup>. It is demonstrated that LLZTO grain size distribution and internal porosity critically affect electrical short‐circuit failure, indicating the importance of electronic properties. Lithium dendrites propagate intergranularly through regions where LLZTO grains are smaller than the bulk average (7.4 ± 3.8 µm for AS in a symmetric cell, 3.1 ± 1.4 µm for M in a half‐cell). Metal also accumulates in the otherwise empty pores of the sintered compact present along the dendrite path. Mechanistic modeling indicates that reaction and stress heterogeneities are interrelated, leading to current focusing and preferential plating at grain boundaries.</jats:p>