Ni-co oxide nanocrystal and its controllable synthesis method and application
A synthesis method and nanocrystal technology, applied in the field of material chemistry, can solve the problems of insufficient energy density of energy storage materials, long charging time of energy storage materials, insufficient power of energy storage materials, etc., achieving short synthesis time, good industrial application prospects, Simple preparation process
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Embodiment 1
[0037] At room temperature (25±5°C), weigh 0.9008g of Ni(CH 3 COO) 2 4H 2 O and 0.4509g of Co(CH 3 COO) 2 4H 2 Pour O into the polytetrafluoroethylene liner containing 10mL of octadecene (ODE), 5mL of dodecylamine and 5mL of oleic acid (OA), put it into a stainless steel reaction kettle after magnetic stirring for 15min, and tighten the kettle cover. Put it in an oven, adjust the temperature to 180 ° C, and the heating rate is 3-4 ° C min -1 , when the temperature reached 180°C, the reaction was continued for 18 hours. After the reaction was completed, the temperature was lowered to room temperature, the reactor was opened, an appropriate amount of absolute ethanol-n-heptane (volume ratio 1:1) was added to disperse, and the solid was separated by centrifugation. Wash the solid with n-heptane-absolute ethanol (volume ratio 1:1), dry it overnight in a vacuum oven, and then put it into a muffle furnace. Adjust the temperature to 350°C and the heating rate to 10°C·min -1， ...
Embodiment 2
[0039] The Ni-Co oxide nanocrystal product that obtains in embodiment 1 is carried out transmission electron microscope (TEM) detection, and the result is as follows figure 1 shown in the figure 1 It can be seen that the Ni-Co oxide nanocrystal has a solid spherical nanocrystal structure, and the diameter of the Ni-Co oxide nanocrystal is 3-5 nm.
Embodiment 3
[0041]In the two-electrode system, by cyclic voltammetry and constant current charge-discharge method, test the electrochemical properties of the Ni-Co oxide nanocrystal sample (hereinafter referred to as the sample) obtained in Example 1, the specific process is as follows:
[0042] The electrochemical experiment was carried out on a CHI660d electrochemical workstation, using a two-electrode test system, and the corresponding positive electrode was the nickel foam electrode modified by the sample obtained in this paper. The negative electrode is a nickel foam electrode modified by activated carbon. All potentials herein are relative to RHE. The electrolyte is 3M KOH solution. All electrochemical tests were performed at 25 °C. For each experiment, all electrodes were tested in 3M KOH solution.
[0043] The preparation method of sample modified nickel foam is as follows:
[0044] Before each test, first cut the nickel foam into a size of 1cm×5cm, ultrasonically clean it wit...
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