The　development　of　next-generation　rechargeable　batteries　necessitates　multi-faceted　electrolyte　architectures　that　can　satisfy　a　wide　range　of　demanding　requirements,　including　high　ionic　conductivity,　electrochemical　and　thermal　stability,　structural　(or　mechanical)　integrity,　selective　ion　transport,　and　interfacial　compatibility.　Metal-organic　frameworks　(MOFs)　have　emerged　as　a　uniquely　versatile　platform　to　address　these　challenges,　owing　to　their　diverse　chemical　functionalities,　tunable　porous　architectures,　and　host-guest　interactions　with　electrolyte　species.　These　features　enable　MOFs　to　serve　multiple　roles　across　battery　components　—　from　facilitating　selective　ion　transport　and　stabilizing　electrode　interfaces　to　suppressing　parasitic　side　reactions.　While　prior　studies　have　explored　MOFs　in　isolated　applications,　this　review　provides　a　comprehensive　and　integrative　perspective　on　their　use　across　the　full　spectrum　of　electrolyte　systems,　ranging　from　liquid　to　solid-state.　The　evolution　of　MOFs　is　detailed　from　early　ionic　conductors　to　functional　separators,　interlayers,　hybrid　electrolytes,　and　solid-state　conductors.　Emphasis　is　placed　on　design　strategies　that　harness　MOF　chemistry　to　regulate　ion　selectivity,　transference　number,　interfacial　reactivity,　and　mechanical　stability.　Finally,　Key　challenges　and　emerging　directions　are　outlined　to　realize　the　potential　of　MOFs　in　enabling　high-performance,　all-solid-state　battery　systems.　This　unified　overview　offers　a　distinct　framework　for　guiding　MOF-based　electrolyte　design　in　next-generation　energy　storage　technologies.　©　2025　Wiley-VCH　GmbH.