A kind of preparation method of double carbon layer coating manganese oxide composite material
A composite material, manganese oxide technology, applied in the fields of nanotechnology, electrochemical generator, nanotechnology for material and surface science, can solve the problems of difficult to control product structure, high raw material cost, complex synthesis process, etc. The effect of reducing the loss of active substances, low cost and wide source of raw materials
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Embodiment 1
[0048] The preparation method of a dibbon-coated manganese oxide composite material of the present invention includes the following steps:
[0049] (1) Take 2mmol MNSO 4 Add 40 mL of ethanol and 40 ml of deionized water mixed solution, 10 mmol NH 4 HCO 3 In 40 ml of deionized water, the mixture was stirred together for 3 h, and the coprecipitation reaction was carried out, and the reaction product was filtered, washed, washed in a vacuum drying tank at 120 ° C, to obtain spherical carbonate;
[0050] (2) Take 1 g of spherical carbonate in a mixed solution of 100 ml of deionized water and 100 ml of anhydrous ethanol. After uniform dispersion, 5 g of glucose is added, stirred for 10 h, drying in a vacuum drying tank at 120 ° C for 10 h, placed In the tubular furnace, the heating rate of 2 ° C / min was raised to 400 ° C in an argon atmosphere and was taken out after cooling to room temperature, resulting in a precursor;
[0051] (3) Put the precursor is placed in a hydrochloric acid...
Embodiment 2
[0055] The preparation method of a dibbon-coated manganese oxide composite material of the present invention includes the following steps:
[0056] (1) Take 2mmol MNSO 4 40 ml of ethanol and 40 ml of deionized water mixed solution, 20 mmol NH 4 HCO 3 In 40 ml of deionized water, the mixture was stirred together for 8 h, and the coprecipitation reaction was carried out, and the reaction product was filtered, washed, and dried in a vacuum drying tank at 105 ° C to obtain spherical carbonate;
[0057] (2) Take 1 g of spherical carbonate in a mixed solution of 100 ml of deionized water and 100 ml of water, and is uniformly dispersion, 1 g of glucose is added, stirred for 24 h, dried in a vacuum drying tank at 105 ° C for 20 h, placed In the tubular furnace, it is raised to 500 ° C in an argon atmosphere of 5 ° C / min and taken out after cooling to room temperature, resulting in a precursor;
[0058] (3) Put the precursor is placed in a 0.1 mol / L of a hydrochloric acid solution, sti...
Embodiment 3
[0062] The preparation method of a dibbon-coated manganese oxide composite material of the present invention includes the following steps:
[0063] (1) Take 2mmol MNSO 4 40 ml of ethanol and 40 ml of deionized water mixed solution, 16 mmol NH 4 HCO 3 In 40 ml of deionized water, the mixture was stirred together for 5 h, and the coprecipitation reaction was carried out, and the reaction product was filtered, washed, washed in a vacuum drying tank at 110 ° C, to obtain spherical carbonate;
[0064] (2) Take 1 g of spherical carbonate into a mixed solution of 100 ml of deionized water and 100 ml of anhydrous ethanol. After the ultrasound dispersion is uniform, 3 g of glucose is added, and after stirring for 18 h, drying 15 h at 110 ° C, placed in a vacuum drying tank In the tubular furnace, it was raised to 450 ° C at a temperature rise rate of 3 ° C / min under an argon atmosphere, and then taken out after cooling to room temperature to obtain a precursor;
[0065] (3) Put the precu...
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