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

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…

• SF
  Stiftelsen för Strategisk Forskning
• E
  Energimyndigheten

  Awards: P2020-90112, P2022-00055
• UU
  Uppsala Universitet