Electrochemical Modeling of Hierarchically Structured Lithium‐Ion Battery Electrodes

Hierarchically structured active materials in lithium-ion battery (LIB) electrodes with porous secondary particles are promising candidates to increase the gravimetric energy density and rate performance of cell. However, there still aspects this technology which not fully understood. Herein, a mathematical model for half cells hierarchically aiming at delivering better insight obtaining deeper knowledge matter is presented. First, classical half-cell originating back Newman coworkers revisited basic assumptions electrochemically based equations As next step, framework volume averaging method used consistently extend model. For both models, full set boundary conditions setup Finally, validated by experiments taken from literature parametric studies conducted. The results suggest that, while rate-limiting factor half-cells diffusion coefficient material, case half-cells, it combination electronic conductivity inner morphology particles.