Rapid determination of solid-state diffusion coefficients in Li-based batteries via intermittent current interruption method

Yu-Chuan Chien, Haidong Liu, Ashok S. Menon, William R. Brant, Daniel Brandell () and Matthew J. Lacey ()
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Yu-Chuan Chien: Uppsala University
Haidong Liu: Uppsala University
Ashok S. Menon: Uppsala University
William R. Brant: Uppsala University
Daniel Brandell: Uppsala University
Matthew J. Lacey: Scania CV AB

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract The galvanostatic intermittent titration technique (GITT) is considered the go-to method for determining the Li+ diffusion coefficients in insertion electrode materials. However, GITT-based methods are either time-consuming, prone to analysis pitfalls or require sophisticated interpretation models. Here, we propose the intermittent current interruption (ICI) method as a reliable, accurate and faster alternative to GITT-based methods. Using Fick’s laws, we prove that the ICI method renders the same information as the GITT within a certain duration of time since the current interruption. Via experimental measurements, we also demonstrate that the results from ICI and GITT methods match where the assumption of semi-infinite diffusion applies. Moreover, the benefit of the non-disruptive ICI method to operando materials characterization is exhibited by correlating the continuously monitored diffusion coefficient of Li+ in a LiNi0.8Mn0.1Co0.1O2-based electrode to its structural changes captured by operando X-ray diffraction measurements.

Date: 2023
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Citations: View citations in EconPapers (3)

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DOI: 10.1038/s41467-023-37989-6

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