Eliminating Discontinuous Interfaces in All-Solid-State Batteries via Dynamic Spatiotemporal Boundary Control Functions \bm{\Phi(x, t, S)}

This paper introduces a revolutionary paradigm for all-solid-state batteries by replacing static, physical interfaces with a "Functional Boundary" defined by a spatiotemporal distribution function \bm{\Phi(x, t, S)}. By treating the battery as a single, programmable medium, the research demonstrates how discontinuous junctions—the primary cause of stress, high resistance, and dendrite growth—can be eliminated through continuous spatial gradients. The methodology leverages external signals to create dynamic potential gates and time-multiplexed functional zones, allowing a single volume to alternate roles as an anode, electrolyte, or cathode. This deterministic approach transitions energy storage from a probabilistic lifetime model to one of absolute reliability. By shifting from structural constraints to informational control, this framework provides the energy foundation for the Beyond ASI vision and orbital civilizations.