Abstract:

Ni(OH)₂ has many advantages as an electrode material for supercapacitors, including a high theoretical specific capacitance, abundant sources, and that it is environmentally friendly. However, its low conductivity significantly limits its electrochemical properties. An effective method to address this issue is through the in situ growth of Ni(OH)₂ on a conductive carbon cloth substrate. Herein, we propose a comprehensive chemical experiment that includes the synthesis of Ni(OH)₂ on carbon cloth, characterization of the electrode materials, and determination of its electrochemical properties. Such a comprehensive experiment will strengthen students' understanding of the chemical equilibrium principle applied in material synthesis, expose them to additional characterization methods and advanced electrochemical analysis methods, such as cyclic voltammetry and galvanostatic charging and discharging, establish basic theoretical knowledge of electrochemistry, and enhance their laboratory skills and comprehensive ability. In addition, this experiment can also assist students to understand the frontier of energy storage technology, stimulate their interest in scientific research, and cultivate their awareness of scientific research innovations. Therefore, this experiment is suitable for use as a college chemistry experiment.

Key words: Nickel hydroxide, Supercapacitor, Cyclic voltammetry, Galvanostatic charge/discharge, Comprehensive experiment