High Current Cycling in a Superconcentrated Ionic Liquid Electrolyte to Promote Uniform Li Morphology and a Uniform LiF-Rich Solid Electrolyte Interphase
| Autor: | Patrick C. Howlett, Steven P. Harvey, Elisabetta Arca, Chunmei Ban, Cristina Pozo-Gonzalo, Thushan Pathirana, Kalani Periyapperuma, Anthony K. Burrell |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Working electrode 02 engineering and technology Electrolyte Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences 0104 chemical sciences Chemical engineering X-ray photoelectron spectroscopy Electrode General Materials Science 0210 nano-technology Current density Dissolution Separator (electricity) |
| Zdroj: | ACS Applied Materials & Interfaces. 12:42236-42247 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.0c09074 |
| Popis: | High-energy-density systems with fast charging rates and suppressed dendrite growth are critical for the implementation of efficient and safe next-generation advanced battery technologies such as those based on Li metal. However, there are few studies that investigate reliable cycling of Li metal electrodes under high-rate conditions. Here, by employing a superconcentrated ionic liquid (IL) electrolyte, we highlight the effect of Li salt concentration and applied current density on the resulting Li deposit morphology and solid electrolyte interphase (SEI) characteristics, demonstrating exceptional deposition/dissolution rates and efficiency in these systems. Operation at higher current densities enhanced the cycling efficiency, e.g., from 64 ± 3% at 1 mA cm-2 up to 96 ± 1% at 20 mA cm-2 (overpotential |
| Databáze: | OpenAIRE |
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