Understanding Impact of Local Heterogeneities During Fast Charge

Kandler Smith, Francois Usseglio Viretta, Andrew Colclasure, Shriram Santhanagopalan, Matthew Keyser, Dennis Dees, Juan Garcia, Shabbir Ahmad, Partha Mukherjee, Aashutosh Mistry, Hakim Iddir, Weijie Mai

Research output: NRELPresentation

Abstract

Reducing battery charging time to 10 minutes would improve the market acceptance and utility of electric vehicles. Such a fast charge rate is difficult to achieve in energy-dense thick battery electrodes, however. In particular, fast charge can drive a lithium plating side reaction that is unsafe and degrades battery capacity. The onset of the lithium plating side reaction is accelerated due to non-uniformities, or heterogeneities that exist within the negative electrode active material particles, within the coating, and at larger battery length scales as well. This presentation summarizes fiscal year 2018-2019 work by NREL, Argonne National Laboratory and Purdue University in the atomistic modeling of Li transport within graphite and continuum modeling of electrochemical heterogeneities that cause early lithium plating onset. non-uniformities, or heterogeneities that exist within the negative electrode active material particles, within the coating, and at larger battery length scales as well. This presentation summarizes fiscal year 2018-2019 work by NREL, Argonne National Laboratory and Purdue University in the atomistic modeling of Li transport within graphite and continuum modeling of electrochemical heterogeneities that cause early lithium plating onset.
Original languageAmerican English
Number of pages35
StatePublished - 2019

Publication series

NamePresented at the 2019 Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting, 10-13 June 2019, Arlington, Virginia

NREL Publication Number

  • NREL/PR-5400-73614

Keywords

  • batteries
  • extreme fast charge
  • graphite
  • heterogeneity
  • lithium plating
  • lithium-ion battery
  • transport

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