Effect of Lorentz force on the electrochemical performance of lithium-ion batteries

- Lorentz force affects the power density of lithium ion battery.
- Electric current density and magnetic force are able to integral in lithium ion battery.
- γ-Fe2O3-containing LiFePO4 electrode overcomes the polarizations at high rate and cycle life measurements.

Lorentz force theory demonstrates that electric current density and magnetic force are proportional, indicating that they compensate each other. In a battery operated at high magnetic forces, the electrons in the active material move fast in a specific magnetic field. γ-Fe2O3, a highly magnetic material, is used to prepare LiFePO4 electrodes to study the effect of the Lorentz force on lithium-ion battery performance. The magnetic field created by γ-Fe2O3 induces magnetic forces on the charged LiFePO4 particles, accelerating electron movement. Superconducting quantum interference measurements reveal that saturation magnetization and remanence are prominent when γ-Fe2O3 is added to the LiFePO4 electrodes. The LiFePO4 electrode containing 15 wt% γ-Fe2O3 led to superior battery capacity (69.8 mAh g− 1 at 10C) compared with the pure LiFePO4 electrode (1.8 mAh g− 1 at 10C). In this study, Lorentz force theory is applied to improve the specific capacity and cycle life at high current rates of a battery containing LiFePO4 cathode materials, suggesting that incorporating γ-Fe2O3 into the cathode is an easy and cheap strategy for increasing the power density and cycle life of lithium-ion batteries.

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