| Summary: | 碩士 === 正修科技大學 === 電機工程研究所 === 101 === The study employs sol-gel method to prepare pseudocapacitance electrodes of NiO supercapacitor, and explores impacts to electrode features from various molar concentrations of NiO solution, various weight percentages of carbon black, various annealing temperatures (150℃~350 ℃), added PEGs of various weight percentages, various film thickness and various electrolyte, so as to find out pseudocapacitance electrode parameters for optimal capacitance features. To study impact of continuous current charge and discharge on capacitance features, and to conduct test for efficiency and stability of continuous current charge and discharge.
As shown in study results, pseudocapacitance electrode of optimal capacitance features can be prepared by use of NiO solution of concentration 1M, and added with 0.11 g carbon black and 0.54 g PEG and under annealing temperature 250 ℃, its specific capacitance of aqueous electrolytes in 1 M KOH/H2O is 117.0 F/g and in 1 M LiClO4/PC is 50.2 F/g. As shown in XRD and SEM analysis, it can be found that nickel oxide crystalline phase presents amorphous under 150 ℃~350 ℃, as shown in charge-discharge analysis, it can be found that NiO electrode voltage in the range of - 3 V ~ 3 V with the charge and discharge current 6 mA, optimal specific capacitance of 50.2 F/g, and calculated capacity density is 62.8 Wh/kg, and power rate is 10.8 kW/kg, and as shown in the test of efficiency and use life for continuous current charge and discharge, NiO electrode presents charge and discharge efficiency approximating 100%, and preferred cohesiveness equipped between electrode materials and substrate, after continuous 1000 times charge and discharge.
|
|---|
