a kind of ceo 2 Nanoparticle-modified co 3 the s 4 Preparation method of nanosheet array
A nanosheet array and nanoparticle technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of easy agglomeration, reduce the utilization rate of active materials and cycle stability, and achieve a simple and effective preparation method. , good electrochemical cycle stability, the effect of promoting electron transfer
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Embodiment 1
[0040] (1) The nickel foam is pretreated with hydrochloric acid and acetone respectively to remove oxides and oily impurities on the surface.
[0041] (2) Take 0.30g of Co(NO 3 ) 2 ·6H 2 O and 0.65g of 2-methylimidazole were dissolved in 20mL deionized water respectively to obtain solution A and solution B. After fully mixing and stirring solution A and solution B, put in pretreated foamed nickel (2×3cm 2 ), stood at room temperature for 4h, took out, washed and dried to obtain Co-ZIF-L-NSAs / NF.
[0042] The scanning electron microscope picture of the Co-ZIF-L-NSAs / NF prepared above is as follows: figure 1 As shown, the right figure is a partially enlarged view of the left figure. from figure 1 It can be seen that Co-ZIF-L has a 2D nanosheet structure and a smooth surface.
[0043] (3) Put Co-ZIF-L-NSAs / NF into a solution of 0.15g thioacetamide dissolved in 50mL of absolute ethanol in advance for hydrothermal reaction, the reaction temperature is 120°C, and the reaction...
Embodiment 2
[0052] (1) Take 0.30g of Co(NO 3 )2·6H 2 O and 0.65g of 2-methylimidazole were dissolved in 20mL deionized water respectively to obtain solution A and solution B. After fully mixing and stirring the A and B solutions, put in the pretreated foamed nickel (2×3cm 2 ), stood at room temperature for 4h, took out, washed and dried to obtain Co-ZIF-L-NSAs / NF.
[0053] (2) Put Co-ZIF-L-NSAs / NF into a solution of 0.30 g of thioacetamide dissolved in 50 mL of absolute ethanol in advance for hydrothermal reaction, the reaction temperature is 130° C., and the reaction time is 6 h. After washing and drying, Co 3 S 4 -NSAs / NFs.
[0054] (3) Take 0.21g Ce(NO 3 ) 3 ·6H 2 O and 0.4 g of hexamethylenetetramine were each dissolved in 20 mL of ethanol to obtain solution C and solution D. Mix solution C and solution D thoroughly, put in Co 3 S 4 -NSAs / NF were subjected to solvothermal reaction, the reaction temperature was 180℃, and the reaction time was 6h. After washing and drying, C...
Embodiment 3
[0059] (1) Take 0.31g of Co(NO 3 ) 2 ·6H 2 O and 0.66g of 2-methylimidazole were dissolved in 20mL deionized water respectively to obtain solution A and solution B. After fully mixing and stirring the A and B solutions, put in the pretreated foamed nickel (2×3cm 2 ), stood at room temperature for 4h, took out, washed and dried, and obtained Co-ZIF-L-NSAs / NF.
[0060] (2) Put Co-ZIF-L-NSAs / NF into a solution of 0.30 g of thioacetamide dissolved in 50 mL of absolute ethanol in advance for hydrothermal reaction at a reaction temperature of 120° C. and a reaction time of 4 h. After washing and drying, Co 3 S 4 -NSAs / NFs.
[0061] (3) Take 0.35g Ce(NO 3 ) 3 ·6H 2O and 0.667 g of hexamethylenetetramine were each dissolved in 20 mL of ethanol to obtain solution C and solution D. Mix solution C and solution D thoroughly, put in Co 3 S 4 -NSAs / NF were subjected to solvothermal reaction, the reaction temperature was 150℃, and the reaction time was 5h. After washing and dryi...
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