A more stable lithium anode by mechanical constriction for solid state batteries
| Autor: | Xin Li, In Kim, Yichao Wang, William Fitzhugh, Luhan Ye, Yibo Su, Eva Gil-González |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Pollution Chemical reaction 0104 chemical sciences Anode Metal Nuclear Energy and Engineering chemistry visual_art visual_art.visual_art_medium Environmental Chemistry Lithium Graphite Composite material 0210 nano-technology Current density |
| Zdroj: | Energy & Environmental Science. 13:908-916 |
| ISSN: | 1754-5706 1754-5692 |
| DOI: | 10.1039/c9ee04007b |
| Popis: | In solid state batteries, lithium dendrites form when the applied current density is higher than a critical value. The critical current density is often reported as 1–2 mA cm−2 at an external pressure of around 10 MPa. In this work, a more advanced mechanical constriction technique is applied on a solid-state battery constructed with Li10GeP2S12 (LGPS) as the electrolyte and a lithium metal/graphite composite as the anode, where the graphite layer was applied to prevent (electro-)chemical reactions between Li metal and LGPS, as well as a short-circuit upon the application of pressure. The decomposition pathway of LGPS at the anode interface is modified by this mechanical constriction design, and the growth of lithium dendrites is inhibited, leading to excellent rate and cycling performances. No short-circuit or lithium dendrite formation is observed for batteries cycled at a current density up to 10 mA cm−2. |
| Databáze: | OpenAIRE |
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