Abstract
Abstract Lithium ion battery cell-level and sub-cell modelling has become almost synonymous with Newman’s Model. This paper sheds light on a specific part of the model, the liquid phase potential, clarifying its difference from the liquid phase potential found in the Butler-Volmer expression. Critically, we show that these two potentials should not be used interchangeably. In fact, the concentration potential gradient differs by a factor of six in standard LiPF6 electrolytes. Consequently, the Butler-Volmer current densities could be affected strongly if the definitions of electrostatic liquid phase potential are inadvertently interchanged.
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