<p>Transition metal fluorides hold promise for high-energy lithium-ion batteries but suffer from irreversible regeneration and sluggish kinetics. Here, an amorphous composite cathode strategy to overcome these limitations is proposed. In the fabricated amorphous LiF–Co–Mo (a-LCM) composite cathodes, LiF nanoclusters are embedded in a disordered Co/Mo matrix. This unique Schottky heterojunction enables reversible order–disorder transitions during cycling, bypassing crystalline lattice constraints. The a-LCM cathode delivers an initial discharge capacity of 602 mAh g⁻¹ with 75% retention after 100 cycles, achieving a high energy density of 918 Wh kg⁻¹ and energy efficiency of 70.6%. Structural analyses reveal surface-dominated conversion mechanisms, where the amorphous matrix promotes LiF regeneration while suppressing bulk degradation. Unlike conventional composites requiring excessive conductive additives, the additive-free a-LCM leverages intrinsic metallic conductivity and interfacial Li⁺ transport pathways. This work establishes amorphous engineering as a transformative approach to reconcile energy density and cyclability in conversion-type cathodes, offering new design principles for high-performance fluoride-based lithium-ion batteries.</p> Graphical abstract <p></p>