A kind of rgo/feooh/rgo composite material and its preparation method and application
A technology of composite materials and nickel foam, which is applied in the direction of hybrid capacitor electrodes, iron oxide/iron hydroxide, etc., can solve the problems of cumbersome preparation methods, electrochemical performance and specific capacity to be improved, and achieve simplified preparation process and good electrochemical storage. Energy properties and the effect of improving conductivity
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[0035] In yet another specific embodiment of the present invention, the preparation method includes:
[0036] (1) Get the nickel foam, soak it in the GO solution, then take out the nickel foam and dry it;
[0037] (2) The graphene-coated nickel foam prepared by step (1) is used as a working electrode, the saturated calomel electrode is used as a reference electrode, the platinum plate electrode is used as a counter electrode, and the iron salt solution is used as an electrolyte. Electrodeposition treatment, take out the sample and dry it;
[0038] (3) Soak the sample prepared in step (2) in the GO solution, take out the nickel foam and dry it;
[0039] (4) The sample obtained in the step (3) is subjected to hydrothermal reaction, and obtained after drying.
[0040] Wherein, the solubility of the GO solution in the steps (1) and (3) is 0.5-3 mg / mL; the immersion time in the GO solution is controlled to be 3-10 minutes;
[0041] The specific conditions for the drying treatmen...
Embodiment
[0049] (1) Take a piece of 1*2cm 2 Soak the clean nickel foam of the same size in 2mg / mL GO solution for five minutes, then take out the nickel foam and put it in an oven at 80°C to dry for 1 hour. Repeat three times. The microscopic appearance is as follows figure 1 shown.
[0050] (2) the nickel foam coated with graphene prepared by step (1) is used as a working electrode, the saturated calomel electrode is a reference electrode, the platinum sheet electrode is a counter electrode, and the ferric nitrate solution of 0.1mol / L is an electrolyte, Electrodeposition was performed at a constant voltage of -0.7~-1.2V for 20min, and then the sample was taken out and dried at 60°C for 12h. Its microscopic appearance is as figure 2 As shown, FeOOH was successfully deposited on the GO surface.
[0051] (3) Soak the sample prepared in step (2) in 2 mg / mL GO solution for five minutes, then take out the nickel foam and dry it in an oven at 80°C for 1 hour, repeating 3 times.
[0052]...
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