Dry Pre?Lithiation for Graphite?Silicon Diffusion?Dependent Electrode for All?Solid?State Battery

The graphite/silicon-based diffusion-dependent electrodes (DDEs) are one of the promising electrode designs to realize high energy density for all-solid-state batteries (ASSBs) beyond conventional composite design. However, also suffers from large initial irreversible capacity loss and fade caused by significant volume change during cycling, which offsets advantages DDEs in ful-cell configuration. Herein, a new concept is presented DDEs, dry pre-lithiated (PL-DDEs) introducing Li metal powder. Since powder provides ions graphite silicon even state, lithiation states active materials increased. Moreover, residual within PL-DDE further serves as an activator reservoir promoting reaction compensating upon respectively. Based on these merits, ASSBs with exhibit excellent cycling performance higher columbic efficiency (85.2% retention 99.6% CE at 200th cycle) compared bare DDE. Therefore, this process must be simple but effective design high-energy-density ASSBs.