| Summary: | 碩士 === 逢甲大學 === 材料科學與工程學系 === 106 === This work was involved in a number if major aspects, including (i) fabrication of monodispersed, narrowly size-distributed polystyrene (PS) microspheres via dispersion polymerization, (ii) production of photonic crystals (PhCs) of PS microspheres on the ITO glass substrates via electrophoretic self-assembly (EPSA) route, (iii) development of template-mediated technique to create photonic crystals (PhCs) with a nickel inverse opal structure (IOS) via electrochemical deposition (ECD), (iv) NiS thin films, NiS/Ni and NiS/Ni-IOS PhCs were prepared by ECD, and (v) sample analysis of their microstructure structures and electrochemical characteristics.
We successfully fabricated the 3-D PhCs of PS microspheres, which were of various size-distributed and well-dispersed features via dispersion polymerization. We carefully tuned the electrochemical deposition time to easily control the thickness of the structure of nickel metal PhCs with invers opal structure. Electrochemical deposition of NiS/Ni electrode through the heat treatment under temperature 300oC and soaking temperature for 2 hr led to the best electrochemical characteristics. The NiS/Ni-IOS structure electrode of supercapacitor sample made by ECD route with constant current density of -0.3 mA/cm2 and deposition time of 20 min rendered a rather outstanding specific capacitance of 1,795 F/g under a charging-discharging (CD) test with current density of 2 A/g. The specific capacitance of such a sample can still maintain at 70% level of the original specific capacitance after 500 cycles under CD test. In this study, we successfully demonstrated that the fabrication of a unique composite of nickel sulfide active media and a highly porous nickel metal media with an inverse opal structure prepared by EPSA and ECD can offer a great potential for interesting design of novel supercapacitor devices.
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