Cathodically Electrochemical Deposition Preparation of Nickel Hydroxide and Nickel-Phosphide as Electrode Material for Supercapacitors and Dye Sensitized Solar Cells

• Main Authors: Jia-Fang Wu, 吳佳芳
• Other Authors: Mao-Sung Wu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/60659078415542579837

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 101 === This study is divided into two parts: the first part is the synthesis of nickel hydroxide film as an electrode material for supercapacitors. The porous nickel hydroxide film was cathodically deposited on the hexagonal ZnO nanorods. After removal of ZnO nanorods, the nickel hydroxide film electrode with porous hollow nanorods was formed. The porous hollow nanorod structure leads to high surface area, allowing the electrolyte penetration into the interior of the hollow nanorods. Therefore, the specific capacitance of the hollow nickel hydroxide nanorod electrode could reach as high as 1581 F g-1. The second part is the synthesis of nickel phosphide film with nanospheres as a counter electrode for dye-sensitized solar cell (DSC). Some nickel-rich regions in the nickel phosphide film were dissolved during the pulse-reverse electrodeposition, forming higher phosphorus content of nickel phosphide film. The catalytic ability of nickel phosphide toward I-/I3- redox couple was enhanced due to the hollow sphere structure and higher phosphorus content. The photovoltaic conversion efficiency of DSC employing nickel phosphide counter could reach as high as 6.8 %, comparable to that of DSC using platinum counter electrode.