INTERLAYER ENGINEERING OF VANADIUM OXIDE AS CATHODE FOR AQUEOUS ZINC ION BATTERY

Abstract

Aqueous zinc ion battery (ZIB), being a promising type of aqueous rechargeable battery, demonstrates great safety during operation. It soon triggers high research attention, which leads to a surge in the number of publications on this topic. Cathode as a component of aqueous ZIB has been successfully modified to enhance its electrochemical performance. Interlayer engineering is one dominant strategy being applied to modify cathode materials such as vanadium oxides. In literature, three possible intercalants (i.e. metal ions, polymeric materials and small molecules) are revealed to effectively modify vanadium oxides as host material, and then to increase one or more aspects of electrochemical performance of aqueous ZIB. In this dissertation, V6O13 with the advantages of having metallic property, mixed oxidation states, alternating single and double layers, and more Zn2+ storage sites, has been selected as the host material. Interlayer engineering using Ca2+, PEDOT, and CO2 as intercalants have been presented sequentially.