Laser 3D printing technology for micro / nano composite structure

• Main Authors: Kuo-Tung Tseng, 曾國棟
• Other Authors: Yeeu-Chang Lee
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/bkvmm8

碩士 === 中原大學 === 機械工程研究所 === 106 === This thesis proposed a method to create molds with hierarchical micro/nano structures to enable the imprinting of conductive polymer polyaniline (PANI) for use as an electrode.The microstructure of mold was made by 3D printing. Computer-aided software (AutoCAD) was used to draw square column structures with micrometer size, and self-made 3D printer was used to fabricate micro-columns. Then the laser interference lithography was employed to build nanostructure on the surface of the micro-columns to form hierarchical micro/nano structures. Polydimethylsiloxane (PDMS) was used as a soft mold to duplicate the pattern of the previous hard mold. At last, PANI solution was poured into PDMS mold, then heat up to fabricate PANI solidified film applied in the supercapacitor. Using field emission scanning electron microscope (FE-SEM) confirmed that the surface structure of the film identification. On a three-electrode electrochemical cell, experiments were performed to characterize the electrochemical properties of plane PANI and PANI with microstructure and hierarchical microstructure, respectively. Cyclic voltammetric (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy (EIS) measurements were then conducted using 1M H2SO4 as an electrolytic solution. Experimental results demonstrated that its specific capacity was 487 F/g, which is higher approximately 60% compared with PANI plane film. Increasing the surface area of PANI through the inclusion of hierarchical structures enhanced oxidation/reduction reactions, leading to a higher average specific capacitance.