Halogen‐Driven Ion Transport Homogenization in 3D Hierarchical MOF for Ultrastable Solid‐State Lithium Metal Batteries

transport kinetics. SSLMBs employing E-LiI electrolytes demonstrate exceptional cycling stability (capacity retention ∼100% after 600 cycles at 2C) with high-voltage cathodes and wide-temperature adaptability. This work advances the rational design of multi-scale ion-conductive frameworks and the pivotal role of lithium halide in regulating Li deposition kinetics, offering a transformative strategy for high-energy-density solid-state battery systems.