Survey of Gas Expansion in Li-Ion NMC Pouch Cells

J. Self,C. Aiken,R. Petibon,J. Dahn

Published 2015 in Journal of The Electrochemical Society

ABSTRACT

This preliminary study investigates initial gas formation in Li[Ni 0.4 Mn 0.4 Co 0.2 ]O 2 (NMC442) pouch cells with three different electrolytes: 3:7 ethylene carbonate : ethyl methyl carbonate (EC:EMC) w/ 1 M LiPF 6 as the control, control + 2% prop-1-ene-1,3-sultone (PES) and control + 2% vinylene carbonate (VC). In situ volume measurements reveal three main features of gas evolution, an initial gas step, gas absorption, and a second gas step at higher voltage. Gas chromatography-mass spectrometry is employed to identify the gaseous compounds. This work illustrates the strong dependence of volume change due to gas evolution on additives, charging rate and temperature.

PUBLICATION RECORD

  • Publication year

    2015

  • Venue

    Journal of The Electrochemical Society

  • Publication date

    Unknown publication date

  • Fields of study

    Materials Science, Chemistry, Engineering

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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