Preparation method of graphene-loaded Alpha-FeOOH sandwiched sheet layer-structure lithium ion battery negative electrode material
A lithium-ion battery and lamellar structure technology, applied in the field of electrochemistry, can solve the problems of poor conductivity, decreased electrode capacity, pulverization and shedding of active materials, etc., and achieve the effects of improving conductivity, stable battery structure, and inhibiting volume expansion.
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Embodiment 1
[0024] 1) Disperse commercially available graphene oxide in 25mL deionized water to form a 1mg / mL solution, and then use a 300W ultrasonic generator to ultrasonically disperse for 1h to form a uniformly dispersed graphene oxide suspension A;
[0025] 2) Add analytically pure soluble iron salt ferric nitrate to 25mL of deionized water, stir to fully dissolve the iron salt, and then add it to suspension A to prepare a mixed solution of iron salt and graphene oxide, in which the iron salt is The concentration is 0.05mol / L, and then the mixed solution is dispersed with a 300W ultrasonic generator for 2h to obtain suspension B;
[0026] 3) Pour the above-prepared suspension B into a homogeneous hydrothermal reaction kettle with a filling degree of 30%, then seal the reaction kettle and put it in a homogeneous hydrothermal reactor for a hydrothermal reaction at 50°C for 5 hours , After the reaction, cool to room temperature naturally to obtain product C;
[0027] 4) Use a centrifuge to wa...
Embodiment 2
[0033] 1) Disperse commercially available graphene oxide in 30mL deionized water to form a 2mg / mL solution, and then use a 300W ultrasonic generator to ultrasonically disperse for 3h to form a uniformly dispersed graphene oxide suspension A;
[0034] 2) Add analytically pure soluble iron salt ferric nitrate to 20mL of deionized water, stir to fully dissolve the iron salt, and then add it to suspension A to prepare a mixed solution of iron salt and graphene oxide. The concentration is 0.3mol / L, and then the mixed solution is dispersed with a 300W ultrasonic generator for 3 hours to obtain suspension B;
[0035] 3) Pour the above-prepared suspension B into a homogeneous hydrothermal reactor with a filling degree of 80%, then seal the reactor and put it in a homogeneous hydrothermal reactor for a hydrothermal reaction at 70°C for 4 hours , After the reaction, cool to room temperature naturally to obtain product C;
[0036] 4) The product C was washed with water and alcohol for 3 times ...
Embodiment 3
[0039] 1) Disperse commercially available graphene oxide in 35mL deionized water to prepare a 5mg / mL solution, and then use a 300W ultrasonic generator to ultrasonically disperse for 2h to form a uniformly dispersed graphene oxide suspension A;
[0040] 2) Add analytically pure soluble iron salt ferric nitrate to 15mL of deionized water, stir to fully dissolve the iron salt, and then add it to suspension A to prepare a mixed solution of iron salt and graphene oxide. The concentration is 0.5mol / L, and then the mixed solution is dispersed with a 300W ultrasonic generator for 4 hours to obtain suspension B;
[0041] 3) Pour the above-prepared suspension B into a homogeneous hydrothermal reactor with a filling degree of 60%, and then seal the reactor, put it in a homogeneous hydrothermal reactor for hydrothermal reaction at 150°C for 3h , After the reaction, cool to room temperature naturally to obtain product C;
[0042] 4) Use a centrifuge to wash product C with water and alcohol for ...
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