Self-supporting binary metal sulfide composite material and preparation method thereof, negative electrode of lithium ion battery, and lithium ion battery
A lithium-ion battery and binary metal technology, applied in battery electrodes, secondary batteries, active material electrodes, etc., can solve the problems of limiting the capacity of lithium-ion batteries, powdering of negative electrode materials, capacity attenuation, etc., and improve electrochemical performance , good growth and compactness, and the effect of enhancing electrical conductivity
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Embodiment 1
[0044] A preparation method of a self-supporting binary metal sulfide composite material, comprising the following steps:
[0045] A, solution reaction operation: dissolve 0.1725g zinc sulfate heptahydrate, 0.1577g nickel sulfate hexahydrate, 0.5821g cobalt nitrate hexahydrate in 40ml deionized water, stir 30min, obtain the solution containing zinc salt, nickel salt and cobalt salt, Dissolve 1 g of 2-methylimidazole in 40 ml of deionized water, and stir for 30 minutes to obtain a 2-methylimidazole solution. The two solutions are mixed and stirred at room temperature for 5 minutes to obtain a mixed solution.
[0046] B. Compounding process: Cleaning of carbon cloth: Cut the carbon cloth into small pieces of 1cm×1cm, put it into a 50ml beaker, and use acetone, ethanol and deionized water to ultrasonicate for 15min each to clean it. Put the cleaned carbon cloth into the mixed solution in step A, let stand for 4 h at room temperature, then take out the carbon cloth with material, ...
Embodiment 2
[0049] A preparation method of a self-supporting binary metal sulfide composite material, comprising the following steps:
[0050] A, solution reaction operation: dissolve 0.1785g hexahydrate zinc nitrate, 0.1745g hexahydrate nickel nitrate, 0.6748g heptahydrate cobalt sulfate in 40ml deionized water, stir 30min, obtain the solution containing zinc salt, nickel salt and cobalt salt, Dissolve 1.2 g of 2-methylimidazole in 40 ml of deionized water, and stir for 30 minutes to obtain a 2-methylimidazole solution. The two solutions are mixed and stirred at room temperature for 5 minutes to obtain a mixed solution.
[0051] B. Compounding process: the cleaning of the carbon cloth is the same as in Example 1. Put the cleaned carbon cloth into the mixed solution in step A, let it stand at room temperature for 8 hours, then take out the carbon cloth with material, rinse it with deionized water three times, and dry it at 60 ° C for 12 hours to obtain Zn / Ni / Co-ZIF / carbon cloth composit...
Embodiment 3
[0054] A preparation method of a self-supporting binary metal sulfide composite material, comprising the following steps:
[0055] A, solution reaction operation: 0.2876g zinc sulfate heptahydrate, 0.2629g nickel sulfate hexahydrate, 1.1641g hexahydrate cobalt nitrate are dissolved in 40ml deionized water, stir 30min, obtain the solution containing zinc salt, nickel salt and cobalt salt, Dissolve 1.4 g of 2-methylimidazole in 40 ml of deionized water, and stir for 30 minutes to obtain a 2-methylimidazole solution. The two solutions are mixed and stirred at room temperature for 5 minutes to obtain a mixed solution.
[0056] B. Compounding process: the cleaning of the carbon cloth is the same as in Example 1. Put the cleaned carbon cloth into the mixed solution in step A, let it stand at room temperature for 5 hours, then take out the carbon cloth with material, rinse it with deionized water three times, and dry it at 60 ° C for 12 hours to obtain Zn / Ni / Co-ZIF / carbon cloth com...
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