Measurement of the Diffusion Coefficient of Lithium in Tin Thin Films Including Phase Transformation Effects

In this work, use of the galvanostatic intermittent titration technique to extract lithium ion diffusion coefficients in tin thin films is studied. The measured results are first analyzed under the traditional solid solution assumptions. The change of phase in the electrode is then modeled using a moving boundary model, which more accurately predicts the potential transients during the galvanostatic pulse.