改性铝集流体电容去离子电极制备及性能研究

Fabrication and Properties of Modified Aluminum Plate Current Collector for Capacitive Deionization Electrodes

以碱刻蚀、电化学腐蚀和镀锌镍合金方式对纯铝片进行改性后作为电容去离子(CDI)电极集流体,改性活性炭粉为活性材料制作CDI电极。采用扫描电镜、电化学工作站表征改性后铝片的微观结构和CDI电极的电化学特性。对比改性铝片集流体CDI和泡沫镍集流体CDI的去离子和脱附效果。结果表明:改性后的铝集流体导电性、耐腐蚀性、电极活性成分粘附性好。相比泡沫镍集流体CDI,改性铝片集流体CDI内电阻更低,双电层电容性能更优,脱盐效果更高。

Capacitor deionization (CDI) electrodes were fabricated with alkaline etching, electrochemical corrosion and zinc nickel alloy coating modified pure Al plate as the current collector, and modified activated carbon powder as the active material. The microstructure and electrochemical characteristics were analyzed by SEM and electrochemical workstation. Comparison studies were conducted on the electrosorption and desorption performances of modified Al plate current col-lector CDI and nickel foam current collector CDI. The results show that after modification, Al plate has good electrical conductivity, corrosion resistance and active material adhesion. Compared with nickel foam current collector CDI, the intrinsic resistance of modified Al current collector CDI is lower, electrical double layer capacitive performance is better, and the deionization efficiency is higher.