Carbon nanofiber loaded lithium titanate thin film materials and manufacturing method thereof
A carbon nanofiber, thin film material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor electrical conductivity, easy powder agglomeration, etc., achieve good electrical performance, environmental protection. Pollution and controllable effects
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Embodiment 1
[0043] 1. Preparation of anatase-titanium dioxide composite thin film materials loaded inside carbon nanofibers
[0044] With magnetic stirring, add 6 ml of glacial acetic acid to 60 ml of N,N-dimethylformamide solution of polyacrylonitrile (10 wt%) and polymethyl methacrylate (3.33 wt%) , forming a homogeneous solution. 4ml of n-tetrabutyl titanate was added and ultrasonically oscillated to obtain an electrospinning solution of titanium precursor.
[0045] The process parameters of electrospinning are: select No. 12 injection needle (inner diameter 1.1mm), apply high voltage 18kV, spinning flow rate 0.6ml / h, the receiving distance between the roller and the syringe needle is 15cm, the roller speed is 3000rpm, The spinning time is 8h. A nanofiber film with a certain thickness and preferred orientation is obtained by spinning.
[0046] The obtained electrospun nanofiber membrane was stretched and pre-oxidized at 280° C. in an air atmosphere, and the holding time was 6 hours....
Embodiment 2
[0055] 1. Preparation of anatase-titanium dioxide composite thin film materials loaded inside carbon nanofibers
[0056] Prepare TiO according to the same conditions as in Example 1 2 CNFs film material.
[0057] 2. Synthesis of Carbon Nanofiber Supported Lithium Titanate Composite Thin Film Material
[0058] The composite film was immersed in a mixed solution of 5mol / L lithium hydroxide aqueous solution and absolute ethanol with a volume ratio of 1:1, transferred to a hydrothermal reaction kettle with a polytetrafluoroethylene lining, and placed in a vacuum drying oven for 130 ℃ for 36 hours, after washing with deionized water, vacuum drying at 80 ℃ for 20 hours to obtain a lithium-titanium-oxygen composite film material supported by carbon nanofibers.
[0059] Finally, put the hydroheated film material into a carbonization furnace, and under the protection of high-purity nitrogen, sinter at a high temperature of 600°C for 10 hours, and finally obtain a composite film lithi...
Embodiment 3
[0064] 1. Preparation of anatase-titanium dioxide composite thin film materials loaded inside carbon nanofibers
[0065] Prepare TiO according to the same conditions as in Example 1 2 CNFs film material.
[0066] 2. Synthesis of Carbon Nanofiber Supported Lithium Titanate Composite Thin Film Material
[0067] Immerse the composite film in a 2mol / L lithium hydroxide aqueous solution, transfer it to a hydrothermal reaction kettle lined with polytetrafluoroethylene, keep it in a vacuum oven at 180°C for 36h, wash it with deionized water, and vacuum it at 80°C After drying for 20 hours, a lithium-titanium-oxygen composite thin film material supported by carbon nanofibers is obtained.
[0068] Finally, the hydroheated film material was put into a carbonization furnace, and under the protection of high-purity nitrogen, it was sintered at a high temperature of 600 ° C for 8 hours, and finally a two-phase composite film lithium-ion battery negative electrode material with carbon nan...
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