Flexible cell based on metallic oxide/graphene composite macroscopic fibers and preparation method
A graphene composite and macro-fiber technology, which is applied in the manufacture of secondary batteries, battery electrodes, circuits, etc., can solve the problems of metal fibers without electrochemical properties, small active materials, easy to fall off, etc., to achieve excellent electrochemical properties, Good mechanical properties, avoid the effect of easy falling off
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[0032] Example one
[0033] 4mg / mL Ti 0.87 O 2 0.52- The aqueous solution was mixed with the 3.9mg / mL graphene oxide aqueous solution and then added to the wet spinning equipment, and injected into the aqueous solution containing 0.6% chitosan (Ti 0.87 O 2 0.52- The mass ratio to graphene oxide is 4). The nascent fiber is obtained by spinning at 5 mL / min. The nascent fiber is stretched orientated at a drawing speed of 2 times, washed with ultrapure water three times, and dried at 28°C for 24 hours to obtain Metal oxide and graphene oxide composite fiber. The composite fiber was soaked in 57% hydroiodic acid for 4.5 hours at a temperature of 90 degrees, and then taken out, washed repeatedly with ultrapure water and ethanol, and dried in the air to obtain a metal oxide and graphene composite macroscopic fiber. .
[0034] Attached figure 1 a is a macro-fiber optical photo of metal oxide and graphene oxide composite, attached figure 1 b is an optical photo of a metal oxide and graph...
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[0040] Example two
[0041] 2mg / mL Ti 0.87 O 2 0.52- The aqueous solution was mixed with the 2mg / mL graphene oxide aqueous solution and then added to the wet spinning equipment, and injected into the aqueous solution containing 1.5% chitosan (Ti 0.87 O 2 0.52- The mass ratio to graphene oxide is 4). The nascent fiber is obtained by spinning at 0.1 mL / min. The nascent fiber is stretched and oriented at a stretching speed of 2 times, washed with ultrapure water three times, and dried at 28°C for 24 hours. The composite fiber of metal oxide and graphene oxide is obtained. The composite fiber was soaked and reduced in 57% hydroiodic acid at a temperature of 90 degrees for 4.5 hours, taken out, washed repeatedly with ultrapure water and ethanol, and dried in the air to obtain a metal oxide and graphene composite fiber.
[0042] The composite fiber and the lithium wire are used as the positive electrode and the negative electrode, respectively, connected to the copper wire collector, and...
Example Embodiment
[0044] Example three
[0045] 4mg / mL Ti 0.87 O 2 0.52- The aqueous solution was mixed with the 3.9mg / mL graphene oxide aqueous solution and then added to the wet spinning equipment, and injected into the aqueous solution containing 0.6% chitosan (Ti 0.87 O 2 0.52- The mass ratio to graphene oxide is 4), and spun at 2mL / min to obtain nascent fibers. The nascent fiber is stretched orientated at a stretching speed of 2 times, washed with ultrapure water three times, and dried at 28° C. for 24 hours to obtain a metal oxide and graphene oxide composite fiber. The composite fiber was soaked and reduced in 57% hydroiodic acid at 70 degrees for 4.5 hours, taken out, washed repeatedly with ultrapure water and ethanol, and dried in the air to obtain a metal oxide and graphene composite fiber.
[0046] The composite fiber and the lithium wire are used as the positive electrode and the negative electrode, respectively, connected to the copper wire collector, and then placed in a heat shrinkabl...
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