Core-shell nanostructured metal oxides for high performance supercapacitors

Some nanomaterials with large surface areas can lead to high charge storage in a supercapacitor, and they have attracted great attention. Different materials have been proposed and used for supercapacitors. In this... [ view full abstract ]

Some nanomaterials with large surface areas can lead to high charge storage in a supercapacitor, and they have attracted great attention. Different materials have been proposed and used for supercapacitors. In this presentation, high performance Ni based oxides and hydroxides supercapacitors will be showing to have very high specific capacitance and energy density. Typically, core-shell structures show not only high specific capacitance but also high total energy per device. Electrochemical performance, microstructure, morphology and BET surface area are found strongly related to Ni, Co and Cu concentration. Due to the high specific capacitance and the much lower price of Ni and Co than Ru, a Ni oxide/hydroxide based supercapacitor has its unique advantage and may be a very promising candidate for the next generation of commercial high capacitance supercapacitors. Full supercpacitor cell prototypes are made, and high energy density is reached. Bulb lighting and fan turning are demonstrated even for a small size supercapacitor device.