Abstract
This communication addresses the limitation of core-shell enhanced single particle model for lithium iron-phosphate recently published by the authors. In this model, the positive particle surface concentration has a jump discontinuity that forms at the transition from the one-phase to the two-phase region, which is responsible for the positive particle overpotential and open circuit potential jumps seen in the cell output voltage. Such a discontinuity is eliminated by proposing a modification of the core-shell enhanced single particle model based on the bulk-normalized lithium concentration. Simulation results show the effectiveness of the new solution against the previously published one.
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