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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。
NiCo_2O_4 nanopowders with different morphology and spinel structure were prepared by microwave homogeneous precipitation using chloride and sulfate as mother salts and urea as precipitating agent respectively. The results showed that the types of mother salts had a significant effect on the morphology and electrochemical performance of NiCo_2O_4 nanopowders. The morphology of NiCo_2O_4 prepared by using chloride as the mother salt is spherical spherulites formed by the aggregation of acicular nanoscale monomers. When the scanning rate is 10 mV / s, the specific capacitance is 150.7 F / g. Scanning The specific capacitance was 107.3 39.7 F / g at a rate of 50 mV / s. NiCo_2O_4, which is made from sulphate as the parent salt, is characterized by flower globular particles aggregated from sheet-like nanoscale monomers. The specific capacitance is 52.5 F / g when the scan rate is 10 mV / s. The specific capacitance was 39.7 F / g at 50 mV / s.