The one dimensional nickel ferrites/graphene composites are synthesized by one-step hydrothermal strategy. Uniform claviform nickel ferrites with a diameter of 40 nm and a length of about 200 nm are homogeneously anchored on graphene sheets. The in situ growth of nickel ferrites on graphene guarantees good structural stability and electrochemical properties. The capacitive performance of the as-synthesized composites is evaluated by galvanostatic charge-discharge, cyclic voltammetry and electrochemical impedance spectroscopy. The composites electrode exhibits the specific capacity of 481.3 F g^-1 at a current density of 0.1 A g⁻¹, and 298.2 F g^-1 at 10 A g⁻¹, suggesting good rate capability. Furthermore, the composites harvest a superior cycling stability over 10000 cycles without obvious capacitance attenuation. The composites demonstrate promising electrochemical performance for supercapacitor electrode due to the synergetic effect between graphene and nickel ferrites.

通过一步水热法合成了一维铁氧体/石墨烯复合材料。将直径为40 nm，长度约为200 nm的均匀的块状镍铁氧体均匀地锚固在石墨烯片上。石墨烯上镍铁氧体的原位生长确保了良好的结构稳定性和电化学性能。合成的复合材料的电容性能通过恒电流充放电，循环伏安法和电化学阻抗谱进行评估。复合电极表现出的481.3 F G的比容量^-1 处的0.1 A g的电流密度^-1，和298.2 F G ^-1 以10 A G ^-1，表示评分能力良好。此外，该复合材料在10000次循环中具有出色的循环稳定性，而电容没有明显衰减。由于石墨烯和镍铁氧体之间的协同作用，该复合材料显示出有希望的超级电容器电极电化学性能。