Journal Article aqueous batteries cascade batteries confinement of water molecules flexible aqueous microbatteries high areal capacity high voltage high volumetric capacitance high-capacity batteries high-energy-density batteries in situ electrodeposition strategy large-scale integration microsized supercapacitors micro‐supercapacitors mortise and tenon joints non‐drying hydrogel polymer‐assisted cation solvation self-shrinkage assembly two-in-one batteries zinc-iodine microbatteries