Fabrication of Cathode with Nanomaterials for Zinc–Air Fuel Cell

• Main Authors: Yu-jia Tsau, 曹玉佳
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/98320392410792662509

碩士 === 國立中正大學 === 化學工程所 === 95 === The purpose of this study is to fabricate cathode with nanomaterials for zinc-air fuel cell. The experiments are mainly divided into two parts. The first part is synthesis of catalysts for oxygen electroreduction. In the second part, we discuss the electrocatalytic performance of different carbon substrate. The catalysts are prepared by impregnating carbon-based supporter with potassium permanganate solution. X-ray diffraction results indicate that the structure of as-prepared catalyst is predominantly amorphous. While XPS and Raman analysis reveals that the as-prepared catalysts are mainly composed of MnO2 and K2MnO4. The Linear Sweep Voltammetry (LSV) results suggest that impregnating 20nm CNC with 0.1 mole KMnO4(s)/50ml can give the best result for oxygen electroreduction. In the second part of experiments, carbon nanocapsules (CNC) were used as the carbon substrate of air electrode to replace the carbon black XC-72 and XC-72R which is commonly used in zinc-air fuel cell. LSV analysis shows that the electrocatalytic performance of CNC-based electrode is superior to that of XC-72 and XC-72R. Moreover, in the discharging test, we find that the operating voltage of CNC-based electrode is comparable to the commercial air electrode (EVT, Mn series cathode).