Pearl cotton shaped nickel oxide lithium battery negative electrode material and preparation method thereof
A technology for nickel lithium oxide and battery negative electrode, which is applied to battery electrodes, nickel oxide/nickel hydroxide, secondary batteries, etc. It can solve the problems of high energy consumption, difficulty in mass production, complicated hydrothermal process, etc. Simple, high conversion rate, easy recycling effect
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[0029] The invention discloses a preparation method of a pearl cotton-like nickel oxide lithium battery negative electrode material, which comprises the following steps:
[0030] Step 1. Dissolving nickel salt in water to prepare a 0.5-1.0 mol / L nickel salt solution. The nickel salt solution is nickel nitrate aqueous solution, nickel acetate aqueous solution and nickel sulfate aqueous solution.
[0031] Step 2. Add glycine to the nickel salt solution at room temperature (20-25°C) and stirring at a speed of 180-220r / min. The molar ratio of the nickel salt solution to glycine is 1:2-2.5, and then add isoflavone The molar ratio of hydrazine, isoniazid and glycine is 1:1.8-1:2. The ratio of isoniazid and glycine is the key to the experiment. Under proper conditions, a dark blue complex solution is formed.
[0032] Step 3. Add ethanol to the above solution until a dark blue colloid is obtained, wash with deionized water three times, and dry at 50-70°C to obtain a dark blue colloida...
Embodiment 1
[0039] Dissolve nickel nitrate in deionized water to obtain a 0.5mol / L nickel nitrate solution; under the stirring condition of 200r / min and temperature at 20°C, add glycine to the nickel nitrate solution, and the molar ratio of nickel nitrate solution to glycine is 1:2; then add isoniazid, the molar ratio of isoniazid and glycine is 1:2; add ethanol to the above solution until a dark blue jelly is obtained, wash three times with deionized water, and dry at 60°C to obtain nickel Precursor: transfer the obtained dark blue glass body to a porcelain boat, sinter it in a tube furnace at high temperature, the heating rate is 2°C / min, and keep it at 500°C for 2 hours to obtain the product. The scanning electron microscope photograph of the obtained product is as follows figure 1 Shown, and the XRD spectrum as figure 2 shown. The cycle performance of the prepared pearl cotton-like NiO assembled into a button battery is as follows: image 3 As shown, the capacity still maintains 6...
Embodiment 2
[0041] A preparation method of pearl cotton-like nickel oxide lithium battery negative electrode material, comprising the following steps:
[0042] Step 1. Dissolve nickel acetate in water and configure 1.0mol / L nickel acetate solution; under the stirring conditions of 180r / min and 25°C, add glycine, nickel acetate solution and mole of glycine to the nickel acetate solution The ratio is 2.5, then add isoniazid, the molar ratio of isoniazid and glycine is 1:1.8, under suitable conditions, a dark blue complex solution is formed; add ethanol to the above solution until a dark blue jelly is obtained , washed three times with deionized water, and dried at 50°C to obtain a dark blue colloidal nickel precursor; place the obtained dark blue colloidal nickel precursor in a porcelain boat, and perform high-temperature calcination in a tube furnace at a calcination temperature of 450°C. The time is 3 hours, the heating rate is 1° C. / min, and pearl cotton-like nickel oxide is obtained aft...
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