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以甲醇和水为混合溶剂,以NaNO3为矿化剂,用溶剂热法合成了Co3O4。借助XRD和TEM对产物的物相和形貌进行了表征,通过循环伏安和恒流充放电测试对Co3O4电极的电化学性能进行了分析。结果表明,所得样品为30nm左右的立方状Co3O4,在1000次循环充放电的过程中,纳米Co3O4电极的放电比容量逐渐增大直至稳定,最高比容量可达到306F.g-1。进一步对所得Co3O4样品进行改性研究证实:掺入适当比例的铝(Al)源可有效地改善Co3O4的电容性能。
Co3O4 was synthesized by solvothermal method using methanol and water as mixed solvents and NaNO3 as mineralizer. The phase and morphology of the product were characterized by XRD and TEM. The electrochemical performance of the Co3O4 electrode was analyzed by cyclic voltammetry and constant current charge-discharge test. The results show that the obtained sample is about 30nm cubic Co3O4, the discharge capacity of nano-Co3O4 electrode gradually increased until stable, the highest specific capacity of up to 306F.g-1 in 1000 cycles of charge and discharge. Further study of the obtained Co3O4 samples confirmed that incorporation of an appropriate proportion of Al source can effectively improve the capacitance of Co3O4.