Publication Date

12-24-2020

Department

Ames Laboratory; Mechanical Engineering; Electrical and Computer Engineering

Campus Units

Ames Laboratory, Mechanical Engineering, Electrical and Computer Engineering

OSTI ID+

1764842

Report Number

IS-J 10395

DOI

10.1016/j.jpowsour.2020.229360

Journal Title

Journal of Power Sources

Volume Number

485

First Page

229360

Abstract

Fast charging of lithium-ion (Li-ion) batteries makes it susceptible to lithium plating. In this study, we report the correlation between capacity loss and cell impedance changes in the battery due to lithium electrodeposition. Li-ion pouch cells with nickel-manganese-cobalt cathode and graphite anode were charged at rates varying from 0.5C to 6C. The cell voltage evolution immediately after charging was monitored to identify the C-rates that result in lithium plating. Electrochemical impedance spectroscopy (EIS) was used to monitor the cell impedance evolution. The impedance of battery cells at C-rates lower than 1C and no lithium plating showed minimal changes from their baseline values in the period immediately after charging. However, the impedance of battery cells undergoing lithium plating and C-rates higher than 3C showed a substantial reduction immediately after charging, with recovery back to baseline values after 30 min of relaxation. These observations suggest that lithium plating causes damage to the solid electrolyte interface (SEI) layer on the anode particles during the charging period, followed by the reformation of the SEI during the relaxation period. The measured capacity loss has a linear correlation with observed impedance change. The linear relationship suggests that impedance monitoring may be used for prognostication of the state-of-health of Li-ion batteries.

DOE Contract Number(s)

ECCS-1611333; AC02-07CH11358

Language

en

Department of Energy Subject Categories

25 ENERGY STORAGE

Publisher

Iowa State University Digital Repository, Ames IA (United States)

IS-J 10395 SI.pdf (261 kB)
Supplemental Information

Available for download on Friday, December 24, 2021

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