CAJ | 학술논문

采用化学氧化聚合法合成了以碳为载体的钴-聚吡咯(PPy)配合物Co-PPy-C,作为气体扩散电极的氧还原催化剂.利用极化曲线、交流阻抗、计时电流等电化学方法测试了其在碱性介质中(6 mol/L KOH) 氧气气氛条件下氧还原的催化性能.电极电位在-0.20 V vs.Hg/HgO时,催化剂电流密度达到158 mA/cm~2,显示出优越的氧还原电催化性能;采取催化层/集流体/气体扩散层的排布方式,以纯锌为负极,6 mol/L的KOH为电解液,将气体扩散电极与锌负极组装成锌-空气电池.电池以80 mA/cm~2进行恒流放电,放电电压为1.0 V,且性能稳定.
채용화학양화취합법합성료이탄위재체적고-취필각(PPy)배합물Co-PPy-C,작위기체확산전겁적양환원최화제.이용겁화곡선、교류조항、계시전류등전화학방법측시료기재감성개질중(6 mol/L KOH) 양기기분조건하양환원적최화성능.전겁전위재-0.20 V vs.Hg/HgO시,최화제전류밀도체도158 mA/cm~2,현시출우월적양환원전최화성능;채취최화층/집류체/기체확산층적배포방식,이순자위부겁,6 mol/L적KOH위전해액,장기체확산전겁여자부겁조장성자-공기전지.전지이80 mA/cm~2진행항류방전,방전전압위1.0 V,차성능은정.
The composite catalysts Co-PPy-C synthesized by oxidative chemical polymerization were applied to the gas diffusion electrode.The catalytic activity of the products towards ORR(oxygen reduction reaction) in 6 mol/L KOH was evaluated by polarization curves (LSV),chronoamperometry and electrochemical impedance spectroscopy (EIS).The electrode with Co-PPy-C as catalysts showed a current density of 158 mA/cm~2 at -0.20 V (vs.Hg/HgO) and high catalytic activity towards ORR.The arrangement of catalytic layer/current collector/gas diffusion layer, the negative electrode of pure zinc and the electrolyte 6 mol/L KOH were selected in the zinc-air cell.The cell discharge voltage is 1.0 V and performance is stable under the condition of 80 mA/cm~2 for constant current discharge.