Study on 3D-RVE multiphysics model of carbon fiber electrode

Carbon fiber electrodes can simultaneously realize energy storage and load-carrying. In this study, a 3D-RVE multiphysics model of carbon fiber electrode is established to simulate the lithiation process under different discharge multiplicities. Results show that lowering the discharge multiplicity and elevating the fiber spacing can promote the uniformity of lithium concentration, stress distribution and volume expansion. The hydrostatic pressure has a facilitating effect on the discharge process, which proves the two-way coupling effect of the model. This work may contribute to understand the lithiation mechanism of carbon fiber electrode and provide ideas for multi-physics field modeling of structural batteries.