Probing Solid-Electrolyte Interphase (SEI) Growth and Ion Permeability at Undriven Electrolyte–Metal Interfaces Using 7Li NMR
| Autor: | Andrew J. Ilott, Alexej Jerschow |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Ion permeability 02 engineering and technology Nuclear magnetic resonance spectroscopy Penetration (firestop) Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion Metal General Energy Chemical physics visual_art visual_art.visual_art_medium Skin effect Interphase Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 122:12598-12604 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.8b01958 |
| Popis: | We examine here the exchange of Li ions between electrolyte and metallic lithium with 7Li NMR spectroscopy. The measurements quantify the liquid–solid exchange processes, as well as the growth of a solid-electrolyte interphase (SEI) layer. A numerical model including diffusion in the solid phase through atom hopping, radiofrequency penetration considerations through the skin effect, as well as surface exchange explains the experimental trends. Incorporation of the growth of an SEI layer explains the “missing” Li quantities, and, as the SEI layer grows, a decreased ion permeability in dependence on the layer thickness is modeled to explain the long-term trends. These measurements provide indirect probes for SEI growth and permeabilities and also provide a means for quantifying Li diffusion in the metal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|