Mechanistic Analysis of Microstructural Attributes to Lithium Plating in Fast Charging

Venkatesh Kabra, Mukul Parmananda, Conner Fear, Francois Usseglio-Viretta, Andrew Colclasure, Kandler Smith, Partha Mukherjee

Research output: Contribution to journalArticlepeer-review

20 Scopus Citations

Abstract

Metallic lithium deposition on graphite anodes is a critical degradation mode in lithium-ion batteries, which limits safety and fast charge capability. A conclusive strategy to mitigate lithium deposition under fast charging yet remains elusive. In this work, we examine the role of electrode microstructure in mitigating lithium plating behavior under various operating conditions, including fast charging. The multilength scale characteristics of the electrode microstructure lead to a complex interaction of transport and kinetic limitations that significantly governs the cell performance and the occurrence of Li plating. We demonstrate, based on a comprehensive mesoscale analysis, that the performance and degradation can be significantly modulated via systematic design improvements at the hierarchy of length scales. It is found that the improvement in kinetic and transport characteristics achievable at disparate scales can dramatically affect Li plating propensity.

Original languageAmerican English
Pages (from-to)55795-55808
Number of pages14
JournalACS Applied Materials and Interfaces
Volume12
Issue number50
DOIs
StatePublished - 16 Dec 2020

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.

NREL Publication Number

  • NREL/JA-5700-77245

Keywords

  • battery safety
  • electrode microstructure
  • extreme fast charging
  • Li plating
  • lithium-ion batteries
  • mesoscale modeling
  • porous composite electrode
  • secondary phase morphology

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