Fast-Charging Aging Considerations: Incorporation and Alignment of Cell Design and Material Degradation Pathways

Parameswara Chinnam, Andrew Colclasure, Bor-Rong Chen, Tanvir Tanim, Eric Dufek, Kandler Smith, Michael Evans, Alison Dunlop, Stephen Trask, Bryant Polzin, Andrew Jansen

Research output: Contribution to journalArticlepeer-review

21 Scopus Citations

Abstract

Fast charging of batteries for electric vehicles is seen as one of the most direct ways to enhance adoption. Currently, fast charging is limited by increased cell aging, which is primarily driven by Li plating and degradation of cathode materials. Here, using combined sets of experimental and computational analysis and a suite of different charge protocols, we begin to examine the interplay between failure mode, cell designs, and ultimately aging mechanisms. Slight variation in cell design and the subsequent impacts that charge protocols have on aging can create distinct cell-to-cell variation. As little as 2% difference in porosity change at the cell negative electrode during cycling due to early Li metal plating has been found to alter the aging pathway and either accelerate or inhibit the loss due to Li plating.

Original languageAmerican English
Pages (from-to)9133-9143
Number of pages11
JournalACS Applied Energy Materials
Volume4
Issue number9
DOIs
StatePublished - 27 Sep 2021

Bibliographical note

Publisher Copyright:
© 2021 The Authors. Published by American Chemical Society.

NREL Publication Number

  • NREL/JA-5700-78800

Keywords

  • aging
  • cell design
  • electrochemical model
  • extreme fast charging
  • Li plating
  • lithium ion-battery
  • material degradation

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