In Situ Pre-lithiation for Silicon Anode Batteries

The patent applies preliminary action by performing pre-lithiation of the silicon anode before the battery enters normal operation. Lithium ions are intentionally added to the anode during manufacturing or initial cycles to compensate for the lithium-ion loss that will occur during the first charge/discharge cycle. This preliminary compensation ensures that sufficient lithium ions remain available for subsequent operational cycles, resolving the contradiction between using silicon anodes for high capacity and suffering from initial lithium-ion loss.

The patent employs self-service by enabling the battery system to perform its own pre-lithiation through integrated design elements. The cathode structure is specifically engineered with excess lithium content and controlled morphology to automatically provide the necessary lithium ions to the silicon anode during initial cycles without requiring external intervention or separate pre-lithiation equipment. This self-service approach improves battery efficiency while minimizing additional process complexity by incorporating the pre-lithiation function into the battery's inherent structure.