Dry-Processed High-Loading Composite Cathodes for High-Energy-Density Solid-State Batteries

This study focuses on the development of dryprocessed composite cathodes for high-energy-density all-solidstate lithium-ion batteries. It systematically investigates the fabrication, structural regulation, and electrochemical performance optimization of high-loading composite electrodes based on a solvent-free dry process. As is well known, conventional wet processing faces challenges such as cracking due to solvent evaporation, limited charge transfer kinetics, and difficulties in improving volumetric energy density when producing highloading electrodes. To address these limitations, this chapter proposes and implements a solvent-free dry electrode process. By incorporating highly conductive carbon nanotubes (CNTs) and nano/micron-sized Lithium Aluminum Titanium Phosphate (LATP) solid electrolyte with high ionic conductivity, a dualconductive 'electron-ion' continuous network was constructed, effectively mitigating polarization and enhancing capacity utilization under high-loading conditions. Through innovations in dry processing, microstructure design, multi-component synergy, and interface engineering, composite cathode sheets with high loading, high capacity, high stability, and excellent transport properties were successfully prepared. This work not only advances dry electrode technology toward practical application but also provides important theoretical and experimental support for the development of next-generation all-solid-state batteries with high energy density and long cycle life.