Abstract
Lack of understanding on the electrical properties of the solid electrolyte interface (SEI) has been one of the major hurdles for developing fast charging Li-ion batteries. Here, we report our preliminary experimental result on the measurement of the electrical resistivity of SEI using the direct-contact technique based on electron microscopy combined with 4-point-probe micro-electrical method. We observed that the SEI layer, which covers uniformly the surface of the graphite anode, exhibits a high resistivity (2.3 × 10 5 Ω·m) comparable to those of typical insulators. In this study, using first principles calculations performed on the computational Li x F 1-x (0.25 < x < 0.75) phases, we elucidate the structural origin responsible for the measured resistivity of SEI by analyzing the electronic structures.
Original language | English |
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Pages (from-to) | 67-70 |
Number of pages | 4 |
Journal | Journal of Korean Institute of Metals and Materials |
Volume | 57 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2019 |
Bibliographical note
Publisher Copyright:© The Korean Institute of Metals and Materials
Keywords
- 4-point-probe technique
- Ab-initio calculation
- Li-ion battery
- Resistivity
- Solid electrolyte interface
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Modelling and Simulation
- Surfaces, Coatings and Films
- Metals and Alloys