Constraining the electrochemical reactivity of free solvent molecules is pivotal for developing high-voltage lithium metal batteries, especially for ether solvents with high Li metal compatibility but low oxidation stability. This paper proposes a molecular anchoring approach to restrict the interfacial reactivity of free ether solvents in diluted electrolytes. Hydrogen-bonding interactions from the anchoring solvent suppress ether side reactions and enhance the stability of nickel-rich cathodes, mitigating exothermic processes under thermal abuse conditions and postponing battery thermal runaway.
