纳米NiCo_2O_4的制备及其电化学性能  

Synthesis and Electrochemical Performance of NiCo_2O_4 Nanoparticles

作　　者：吴双[1] 刘庆[1] 闫庆龙[1] 姜奉华[1] 王介强[1] 

机构地区：[1]济南大学材料科学与工程学院,济南250022

出　　处：《硅酸盐学报》2017年第4期504-509,共6页Journal of The Chinese Ceramic Society

基　　金：山东省自然科学基金项目(ZR2012EMM005)

摘　　要：分别以氯化物和硫酸盐为母盐,尿素为沉淀剂,采用微波均相沉淀法制备了不同形貌尖晶石结构的NiCo_2O_4纳米粉体。结果表明:母盐种类对NiCo_2O_4纳米粉体形貌及其电化学性能有显著的影响。以氯化物为母盐制得的NiCo_2O_4,其形貌为由针状纳米级单体聚集而成的刺球状颗粒;当扫描速率为10 mV/s时,其比电容为150.7 F/g;扫描速率为50 mV/s时,比电容为107.3 39.7 F/g。以硫酸盐为母盐制得的NiCo_2O_4,其形貌为由片状纳米级单体聚集而成的花球状颗粒;当扫描速率为10 mV/s时,其比电容为52.5 F/g;扫描速率为50 mV/s时,比电容为39.7 F/g。NiCo2O4 nanoparticles with different morphologies were prepared via microwave homogeneous precipitation using chloride and sulfate of nickel and cobalt as raw materials and urea as a precipitant. The results show that the resultant NiCo2O4 particles present a spinal structure after the calcination of the precursors synthesized with different mother salts. The resultant particles prepared with chloride show a thorn-ball shape assembled from needle-like nano-monomer, and exhibit specific capacitances of 150.7 F/g at scanning rate of 10 mV/s, and 107.3 F/g at scanning rate of 50 mV/s, respectively. The particles prepared with sulfate show a ball-flower shape assembled from nano-flake, and exhibit specific capacitances of 52.5 F/g at a scanning rate of 10 mV/s, and 39.7 F/g at a scanning rate of 50 mV/s, respectively.

关 键 词：钻酸镍 纳米颗粒 微波均相沉淀 形貌 电化学性能 

分 类 号：TM911[电气工程—电力电子与电力传动]