Preparation method of manganous-manganic oxide-stannic oxide/cobaltosic oxide composite material
A technology of trimanganese tetraoxide and tricobalt tetraoxide, which is applied in the direction of secondary batteries, electrochemical generators, electrical components, etc., can solve the problems of difficult control of the preparation process, different sizes of products, and different shapes and products. Achieve the effect of uniform size, low cost and environmental friendliness
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Embodiment 1
[0052] Step 1. Weigh 1mmol (158mg) of potassium permanganate (KMnO 4 ) Is dissolved in 30 mL of mixed solution (which contains N,N-dimethylformamide and deionized water, the volume ratio is 1:1), and mixes solution A of 33.3 mM under continuous stirring for 30 min.
[0053] Step 2: Transfer the obtained mixed solution A to a 50mL polytetrafluoroethylene lined hydrothermal kettle, the filling ratio is controlled at 50%, the hydrothermal temperature is 120°C, and the reaction time is 4h. After the reaction is completed, the product is centrifuged and washed three times with absolute ethanol and deionized water, and then dried in a vacuum drying oven at 40°C for 8 hours, and then ground to obtain Mn 3 O 4 Nanorod powder.
[0054] Step 3. Weigh 1.5 mmol of crystalline tin tetrachloride and dissolve it in 15 mL of deionized water to prepare a 0.1 M solution, and dropwise add 20 mL of 1.0 M sodium hydroxide solution under continuous stirring to form a mixed solution B.
[0055] Step 4. Wei...
Embodiment 2
[0058] Step 1. Weigh 2mmol (316mg) of potassium permanganate (KMnO 4 ) Dissolve in 30 mL of mixed solution (which contains N,N-dimethylformamide and deionized water, with a volume ratio of 1:1), and prepare 66.7 mM mixed solution A under continuous stirring for 30 minutes.
[0059] Step 2: Transfer the obtained mixed solution A to a 50mL polytetrafluoroethylene lined hydrothermal kettle, the filling ratio is controlled at 50%, the hydrothermal temperature is 120°C, and the reaction time is 6h. After the reaction is completed, the product is centrifuged and washed three times with absolute ethanol and deionized water, and then dried in a vacuum drying oven at 40°C for 8 hours, and then ground to obtain Mn 3 O 4 Nanorod powder.
[0060] Step 3. Weigh 3.0 mmol of crystalline tin tetrachloride and dissolve it in 15 mL of deionized water to prepare a 0.2M solution, and add 20 mL of 1.0M sodium hydroxide solution dropwise under continuous stirring to form a mixed solution B.
[0061] Step ...
Embodiment 3
[0064] Step 1. Weigh 3mmol (474mg) of potassium permanganate (KMnO 4 ) Dissolve in 30 mL of mixed solution (which contains N,N-dimethylformamide and deionized water, with a volume ratio of 1:1), and prepare a 100 mM mixed solution A under continuous stirring for 30 minutes.
[0065] Step 2: Transfer the obtained mixed solution A to a 50mL polytetrafluoroethylene lined hydrothermal kettle, the filling ratio is controlled at 50%, the hydrothermal temperature is 120°C, and the reaction time is 8h. After the reaction is completed, the product is centrifuged and washed three times with absolute ethanol and deionized water, and then dried in a vacuum drying oven at 40°C for 8 hours, and then ground to obtain Mn 3 O 4 Nanorod powder.
[0066] Step 3. Weigh 4.5 mmol of crystalline tin tetrachloride and dissolve it in 15 mL of deionized water to prepare a 0.3M solution, and add 20 mL of 1.0M sodium hydroxide solution dropwise under continuous stirring to form a mixed solution B.
[0067] Step...
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