凯发

We have fabricated genuine superlattice nanocomposites through molecular-scale hetero-assembly of anionic conductive graphene (oxide) and cationic redoxable transition metal hydroxide nanosheets. A synergistic effect arising from the 2D molecular hybridization has enabled us to develop hybrid supercapacitors with high capacity and high power rate as well as efficient electrocatalysts for water splitting. The analyses of electrochemical activity surface area and impedance clearly indicated that the superlattice structure was beneficial in facilitating the migration/transfer of charge and reactants, revealing the electrochemical energetics and mechanism behind the synergistic effect. The proof of concept toward total water splitting using the newly developed electrocatalysts was demonstrated by an electrolysis cell powered by a single AA battery (1.5V).