Tortuosity in electrochemical devices: a review of calculation approaches

Bernhard Tjaden, Dan J. L. Brett, Paul R. Shearing

Here, a review of tortuosity calculation procedures applied in the field of electrochemical devices is presented to better understand the resulting values presented in the literature. Visible differences between calculation methods are observed, especially when using porosity–tortuosity relationships and when comparing geometric and flux-based tortuosity calculation approaches.