All-Electrochem-Active All Solid State Batteries

The commercialization of all-solid-state batteries is impeded by insufficient cycling stability, largely stemming from the complex electrochemical-mechanical coupling at solid-solid interfaces. Traditional optimization strategies(e.g., surface modification)demonstrate limited efficacy in practical implementation for solid-state systems, as their paradigmatic foundation rooted in multi-phase composite structures (active materials, electrolytes, and carbon) adapted from liquid batteries—configurations incompatible with rigid solid-state architectures. Here, tailored to the unique transport mechanisms and mutual constraints of solid phases, we describe a novel all-solid-state electrode design: all-electrochem-active all-solid-state electrode, which is constructed by ionic-electronic dual-carrier-conducting active materials without non-active solid electrolytes and carbon. By integrating ion-electron transport pathways, enhancing electrode kinetics, and offering the potential for intrinsic structural and electrochemical stability, this all-electrochem-active electrode design establish a paradigm shift in solid-state battery development, opening a new avenue toward high-density, electrochemically and mechanically robust all-solid-state batteries.