Journal Article water-in-salt SEI construction Zn protection Zn salts Zn-metal batteries all-solid-state batteries anode-free batteries aqueous Li ion battery aqueous Li-ion batteries aqueous Na-ion batteries aqueous electrolytes aqueous lithium‐ion batteries battery polarization reduction bifunctional electrode additive bifunctional solvents cell expansion conductive networks electrode-electrolyte interfaces electrolytes electronic conductive inorganic cathodes electronic double layer energy density flexible battery fluorocarbon gel polymer electrolyte high energy inert cations lean electrolytes lithium-metal batteries