Abstract: Described herein is a hybrid pattern ablated onto the surface of anodes and cathodes used for batteries (e.g., Li-ion batteries) using an ultrafast laser. The hybrid pattern incorporated channels and a hexagonally tessellated pore network. The former is used to enhance electrode wetting during cell fabrication while the latter dramatically enhances the fast-charge capabilities of the battery. The ideal pattern was determined by a genetic algorithm and a multi-physics model was used to refine the pattern dimensions to optimize electrochemical performance.

Abstract: The present disclosure relates to utilizing laser ablation to selectively remove regions of active material from lithium-ion battery electrodes during production, forming channels. These channels may improve the radius of curvature of the lithium-ion battery, form patterns on the surface of the electrode to store excess electrolyte, provide improved access to external sources of lithium during pre-lithiation or re-lithiation, and/or lower the tortuosity of electrodes for enhanced ion transfer between electrodes during cycling in prismatic cells and cylindrical cells.