Nickel-tin alloy and nickel sulfide core-shell nanoflower composite material as well as preparation method and application thereof
A composite material and alloy nanoparticle technology, which is applied in the field of supercapacitor electrode material preparation, can solve the problems of large size of composite materials, and achieve the effects of improving electrical conductivity and specific capacitance.
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Embodiment 1
[0040] a Ni 3 Sn 2 @Ni 3 S 2 The preparation method of core-shell nanoflower composite material specifically includes the following steps:
[0041] S1. Dissolve 0.59g nickel chloride hexahydrate and 0.54g stannous sulfate in 100mL deionized water, add 2.2g sodium hypophosphite, dissolve and mix evenly, then add 60mL sodium hydroxide aqueous solution with a concentration of 5mol / L, and stir evenly , and then add 10 mL of ammonium fluoride aqueous solution with a concentration of 1 mol / L to obtain a mixed solution a; then place the mixed solution a in a reaction kettle for hydrothermal reaction for 12 hours, and the reaction temperature is 220 ° C. After the reaction, the reaction precipitate was collected and used for The reaction precipitate was washed three times with ionized water and absolute ethanol, centrifuged and dried in vacuum to obtain Ni 3 Sn 2 alloy nanoparticles;
[0042] S2. Take 1g Ni 3 Sn 2 The alloy nanoparticles were added to 500 mL of potassium hydro...
Embodiment 2
[0047] a Ni 3 Sn 2 @Ni 3 S 2 The preparation method of core-shell nanoflower composite material specifically includes the following steps:
[0048] S1. Dissolve 0.59g nickel chloride hexahydrate and 0.54g stannous sulfate in 100mL deionized water, add 2.2g sodium hypophosphite, dissolve and mix evenly, then add 60mL sodium hydroxide aqueous solution with a concentration of 5mol / L, and stir evenly , and then add 10 mL of ammonium fluoride aqueous solution with a concentration of 1 mol / L to obtain a mixed solution a; then place the mixed solution a in a reaction kettle for a hydrothermal reaction for 10 h at a reaction temperature of 250 ° C. After the reaction, collect the reaction precipitate and use it to The reaction precipitate was washed three times with ionized water and absolute ethanol, centrifuged and dried in vacuum to obtain Ni 3 Sn 2 alloy nanoparticles;
[0049] S2. Take 0.75g Ni 3 Sn 2 The alloy nanoparticles were added to 500 mL of potassium hydroxide sol...
Embodiment 3
[0052] a Ni 3 Sn 2 @Ni 3 S 2 The preparation method of core-shell nanoflower composite material specifically includes the following steps:
[0053] S1. Dissolve 0.95g nickel chloride hexahydrate and 0.85g stannous sulfate in 100mL deionized water, add 4.2g sodium hypophosphite, dissolve and mix evenly, then add 60mL sodium hydroxide aqueous solution with a concentration of 5mol / L, and stir evenly , and then add 10 mL of ammonium fluoride aqueous solution with a concentration of 1 mol / L to obtain a mixed solution a; then place the mixed solution a in a reaction kettle for a hydrothermal reaction for 14 hours at a reaction temperature of 200 ° C. After the reaction is completed, the reaction precipitate is collected and used The reaction precipitate was washed three times with ionized water and absolute ethanol, centrifuged and dried in vacuum to obtain Ni 3 Sn 2 alloy nanoparticles;
[0054] S2. Take 1.25g Ni 3 Sn 2 The alloy nanoparticles were added to 500 mL of potass...
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