Nickel-cobalt-manganese sulfide-hollow mesoporous carbon sphere nano composite material and preparation method thereof
A technology of nanocomposite materials and composite materials, applied in the field of nickel cobalt manganese sulfide@hollow mesoporous carbon sphere nanocomposite materials and its preparation, can solve the problems of small specific surface area of composite materials and low utilization rate of active materials, and achieve good results Cycling stability, high specific capacity, and the effect of improving cycle performance
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[0030] figure 1 It is a schematic diagram of the preparation method of the present invention. First, in continuous mechanical stirring, electrostatic action makes Ni 2+ , CO 2+ And Mn 2+ Uniformly adsorbed in the inner and outer surface of the hollow mesh carbon ball; at the same time, the hollow mesh carbon ball is SiO 2 The etching effect, the inner surface is more rough and has more oxygen-containing functional groups, more conducive to the adsorption of metal ions, resulting in priority nucleation growth of the internal nickel-cobalt-manganese hydroxide nanoflake, and the outer surface also forms uniform Coated nickel-manganese hydroxide. During the hydrothermal process, due to ion exchange, nickel-cobalt-manganese hydroxide in the inner and outer surface is converted to nickel-cobalt-manganese sulfide, and finally forms a three-shell layer nickel-cobalt sulfide @ 中let mesh carbon ball nanocomposite Material.
[0031] The nickel-cobalt sulfide @ 中let mesh carbon ball nanocomp...
Embodiment 1
[0046] In the first step, 27.7 mL of tetraethylene tetrametate was added to a solution containing 560 ml of anhydrous ethanol, 80 mL deionized water and 24 mL of concentrated water, and the mixture was stirred at a constant temperature water bath at 25 ° C. 10 min is added to the formaldehyde solution to stir 24 h;
[0047] In the second step, the first step is obtained, and then dried, in a nitrogen atmosphere, at 2 ° C min. -1 The temperature rise rate rises to 700 ± 10 ° C, constant temperature reaction 5 h;
[0048] In the third step, the product obtained by the second step is 2 times or more of the hydrofluoric acid solution of 10% by mass.
[0049] In the fourth step, the product obtained by the third step was cleaned and dried, and 40 mg of the product was dispersed in 30 mL deionized water.
[0050] In the fifth step, 0.593 g nickel nickel, 0.5879 g of cobalt nitrate and 0.7158 g of manganese nitrate were stirred in 30 ml deionized water;
[0051] In the sixth step, the so...
Embodiment 2
[0059] In the first step, 27.7 mL of tetraethylene tetrametate was added to a solution containing 560 ml of anhydrous ethanol, 80 mL deionized water and 24 mL of concentrated water, and the mixture was stirred at a constant temperature water bath at 25 ° C. 10 min is added to the formaldehyde solution to stir 24 h;
[0060] In the second step, the first step is obtained, and then dried, in a nitrogen atmosphere, at 2 ° C min. -1 The temperature rise rate rises to 700 ± 10 ° C, constant temperature reaction 5 h;
[0061] In the third step, the product obtained by the second step is 2 times or more of the hydrofluoric acid solution of 10% by mass.
[0062] In the fourth step, the product obtained by the third step was cleaned and dried.
[0063] In the fifth step, 0.593 g nickel nickel, 0.5879 g of cobalt nitrate and 0.7158 g of manganese nitrate were stirred in 30 ml deionized water;
[0064] In the sixth step, the solution obtained by the fourth step is mixed with the solution obt...
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