【摘要】 采用粉末冶金技术制备CNTs/Pb复合阳极,讨论了碳纳米管浓度、烧结气氛、成型压力对锌电积用复合阳极电化学性能的影响。结果表明,复合阳极电催化活性随着电解液中碳纳米管含量的增加呈现先增后减趋势。随着成型压力的上升也呈现出先增后减趋势。在1g/L CNTs、成型压力410MPa、真空环境烧结的较优工艺条件下,制得的CNTs/Pb复合阳极在500A/m2电流密度下的阳极电位稳定在1.446 8V,较传统铅银阳极的低59.1mV,较纯铅阳极的低173.2mV。更多还原

【Abstract】 The preparation of CNTs/Pb composite anodes by powder metallurgy was studied.The effects of carbon nanotube concentration,sintering atmosphere and pressing pressure on the electrochemical performance of composite anodes for zinc electrowinning were discussed.The research shows that the electrocatalytic activity of the composite anode first increases and then decreases with the increase of the content of carbon nanotubes in the electrolyte.the electrochemical performance of the anode showed a trend of first increases and then decreases with the increase of pressing pressure.Under the optimal process conditions of forming pressure 410 MPa and 1 g/L CNTs under vacuum sintering atmosphere,the prepared CNTs/Pb composite anode has an anode potential stable at 1.446 8 Vin a current density of500 A/m2,which is 59.1 mV lower than that of a conventional lead-silver anode and 173.2 mV lower than that of a conventional pure lead anode.更多还原