Chemo-mechanical modeling of the diffusion and fracture in cathode materials of lithium-ion batteries
Li-ion batteries have gained wide popularity in energy storage applications due to their lightweight and high energy density. The chemical energy in the active materials of electrodes in the battery can be converted into electric energy directly, by means of an electrochemical reduction/oxidation reaction where the lithium ions intercalate into the electrodes. Thereby, the energy can be stored and released easily via the charge/discharge process of the battery. However, during this process, those electrodes experience irreversible mechanical degradation due to high stresses. Moreover, many electrode materials (i.e. LiFePO4, lithium-nickel-manganese oxides) undergo phase transformation and separation upon lithium intercalation. To gain a fundamental understanding of the mechanisms of the lithium-ion batteries, the chemo-mechanical models are naturally involved. The interplay between the electrochemical reaction, the charge and mass transport, as well as the mechanical fracture will be introduced in this talk.
Technical University of Darmstadt
Division Mechanics of Functional Materials
|Mechanics of Functional Materials|