▎ 摘　　要

We reported a facile self-generated sacrificial template method for fabricating mesoporous three dimension NiCo2O4/graphene electrode material. Nickel, cobalt, and zinc ions dissolved in ethylene glycol reacted with potassium hydroxide solution to co-deposit onto graphene at 140 A degrees C under atmospheric environment. With further addition of potassium hydroxide, zinc hydroxide as a self-generated sacrificial template was dissolved in situ, leading to the formation of mesoporous morphology. Structure and morphology characteristics were determined by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, and N-2 adsorption experiments. Electrochemical properties were analyzed by AC impedance spectroscopy, cycling voltammetry, and charge/discharge test in 2 M KOH. Results showed that the as-prepared NiCo2O4/graphene electrode possessed a large specific surface area of 281.4 m(2) g(-1), an ultrahigh specific capacity of 1024.99 and 662.12 C g(-1) at current density of 1 and 50 A g(-1) respectively, and a long-term cycling life of 10,000 charge/discharge tests.