Investigation of the effects of magnetic field on the stability and transport properties of lithium ions

Abstract

Lithium-ion battery is considered to be the most ideal energy storage material due to its high theoretical specific capacity and low reduction potential. However, the lithium dendrites generated during the charge and discharge cycling hinder its further application. Using density functional theory (DFT) and molecular dynamics methods, the lithium ions transport mechanism on the cathode of LiFePO₄ battery is studied. The influence of magnetic field on the stability and transport properties of lithium-ion battery surface is analyzed. The magnetic field could play a crucial role in enhancing the stability and transport of lithium ions at the interface by promoting a more orderly charge distribution and reinforcing the interfacial bonding. The results show that the magnetic field could effectively enhance the transport of lithium ions. When the magnetic induction intensity is 0.6 T, the surface stability of the electrode material could be effectively promoted, and the electrochemical performance of the battery is the best. In addition, after the introduction of magnetic field, the ion transport properties of the battery are improved. This leads to a reduction in the lithium-ion concentration at the anode, which in turn weakens the driving force and effectively inhibits the formation of lithium dendrites. This study could provide a deeper insight into the effects of magnetic field on lithium-ion battery compared to previous research, filling a gap in the existing knowledge base.