ABSTRACT
This chapter describes a macroscopic simulation model of a lithium-ion battery and some simulations examples. During charging, lithium ions are precipitated on the surface of active primary particles in the positive electrode, which are transported in the electrolyte of the positive electrode, pass through the separator, and then intercalate in the active material of the negative electrode. The electrochemical processes of a lithium-ion battery take place in various space–time scales. The chapter introduces transport equations of lithium ions and electrons. It shows the simulation results about the relaxation process of the lithium-ion distribution when olivine-based material is used as the active particle of the positive electrode. Ion beam analysis of the lithium-ion battery by the use of Takasaki Ion Accelerators for Advanced Radiation Application shows that the distribution of the lithium-ion concentration has a smaller gradient in the thin electrode than that in the thick electrode.
