Temperature-Dependent Solubility of Solid Electrolyte Interphase on Silicon Electrodes

Caleb Stetson, Chun Sheng Jiang, Mowafak Al-Jassim, Nathan Neale, Anthony Burrell, Steven DeCaluwe, Chunmei Ban, Yanli Yin

Research output: Contribution to journalArticlepeer-review

49 Scopus Citations

Abstract

The lithium-ion batteries powering mass market electric vehicles must be capable of operating in a wide temperature range. Temperature variation has the potential to greatly affect the stability of the solid electrolyte interphase (SEI) responsible for mitigating capacity fade due to electrolyte decomposition in the lithium-ion battery. In this work, we investigate the solubility of the SEI on the silicon (Si) electrode, an alternative anode material to the conventional graphite electrode, at temperatures ranging from -10 to 50 °C. Through use of an electrochemical protocol with a high cathodic cutoff voltage, we measure the evolution of the SEI independently of competing Si mechanical stress. We correlate the electrochemical data with three-dimensional resistivity versus depth profiling as well as atomic force microscopy to show that SEI dissolution occurs at significantly faster rates at higher temperatures.

Original languageAmerican English
Pages (from-to)2770-2775
Number of pages6
JournalACS Energy Letters
Volume4
Issue number12
DOIs
StatePublished - 13 Dec 2019

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

NREL Publication Number

  • NREL/JA-5K00-75347

Keywords

  • capacity
  • lithium-ion batteries
  • solid electrolyte interphase
  • temperature

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