Direct measurement of electric resistivity of solid electrolyte interface using 4-point-probe technique

Jun Hyoung Park, Yong Seok Choi, Hyung Cheoul Shim, Jae Pyoung Ahn, Jae-chul Lee

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)67-70
Number of pages4
JournalJournal of Korean Institute of Metals and Materials
Volume57
Issue number1
DOIs
Publication statusPublished - 2019 Jan 1

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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

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