Unlock instant, AI-driven research and patent intelligence for your innovation.
A kind of preparation method and application of nano tio2(b)/carbon composite fiber for negative electrode of lithium ion battery
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A lithium-ion battery, carbon composite technology, applied in the fields of electrochemistry and material chemistry, to achieve the effects of low production cost, guaranteed purity, and controllable component structure
Inactive Publication Date: 2016-02-24
EAST CHINA UNIV OF SCI & TECH
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
This preparation method has not yet seen literature and patent reports
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0018] Embodiment 1 prepares TiO 2 (B) / C composite fiber Ⅰ
[0019] Under the condition of magnetic stirring, 0.8g of tetrabutyl titanate and 0.4g of PVP were dissolved in a mixed solution of 6mL of ethanol, 2mL of acetic acid and 1mL of N,N-dimethylformamide, mixed and stirred evenly. Take 10mL of the solution with a syringe, the front of the spinneret is a copper mesh collection device, the voltage is 10kV, and the flow rate is 1.0mL / h. After spinning, the TBT / PVP precursor fiber was obtained, the fiber membrane was carefully removed, and vacuum dried at 60°C. Then, under the protection of nitrogen, the temperature was raised to 300° C. for calcination at a rate of 2° C. / min, and the temperature was kept for 120 minutes.
[0020] Dissolve 0.35 g of the calcined sample in 10M NaOH solution to obtain a suspension. React in a closed 50mL hydrothermal kettle at 200°C for 24 hours. After stopping the reaction, wash the precipitated product with 0.1M hydrochloric acid and deion...
Embodiment 2
[0022] Embodiment 2 prepares TiO 2 (B) / C composite fiber Ⅱ
[0023] Under magnetic stirring conditions, 0.8 g of tetrabutyl titanate and 0.4 g of PVP were dissolved in a mixed solution of 5 mL of ethanol, 2 mL of acetic acid and 1 mL of N,N-dimethylformamide. Mix and stir well. Take 10mL of the solution with a syringe, the front of the spinneret is a copper mesh collection device, the voltage is 11kV, and the flow rate is 1.0mL / h. After spinning, the TBT / PVP precursor fiber was obtained, the fiber membrane was carefully removed, and vacuum dried at 60°C. Then, under the protection of nitrogen, the temperature was raised to 500° C. for calcination at a rate of 2° C. / min, and the temperature was kept for 120 minutes.
[0024] Dissolve 0.4 g of the calcined sample in 10M NaOH solution to obtain a suspension, react in a closed 50mL hydrothermal kettle at 180°C for 24 hours, stop the reaction, and wash the precipitated product with 0.1M hydrochloric acid and deionized water Was...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention relates to a preparation method and application of nano TiO2(B) / carbon composite fibers for a lithium ion battery cathode. The preparation method comprises the following steps: firstly, synthesizing tetrabutyl titanate / polyvinylpyrrolidone precursor fibers through electrostatic spinning; then, drying the precursor fibers, and carbonizing the precursor fibers at the temperature of 300-500 DEG C under the protection of nitrogen or argon; finally, carrying out hydro-thermal treatment on the carbonized product to obtain the nano TiO2(B) / carbon composite fibers. The preparation method disclosed by the invention is simple and convenient, the composition of titanium dioxide and carbon source is realized in one step, and the introduction of carbon source is not required in subsequent experiment, thus the purity of a product is ensured, the raw material is saved, and the production cost is low. The obtained nano TiO2(B) / carbon composite fibers for the lithium ion battery cathode material have good cycle performance, and can keep high capacity especially at quick charging and discharging rates, thus the cycle efficiency is high, the capacity is reduced slowly, the conductivity is improved because of the introduction of carbon, and the resistance is reduced.
Description
technical field [0001] The invention discloses a nano-TiO used for lithium-ion battery negative electrode 2 The preparation method and application of (B) / carbon composite fiber belong to the fields of electrochemistry and material chemistry. Background technique [0002] Titanium dioxide has become a research hotspot in the field of materials due to its broad application prospects in photocatalysis, photolysis of water, sensors, dye-sensitized solar cells, and lithium-ion batteries. Common titanium dioxide mainly includes four crystal phases: anatase phase, rutile phase, brookite phase and TiO 2 (B) phase. Among all crystal phases, TiO 2 (B)-type titanium dioxide belongs to the monoclinic system, with the loosest structure, large interlayer spacing and low density, which is conducive to the intercalation and removal of lithium ions, so it has potential superior performance in the application of lithium-ion batteries . [0003] To a large extent, TiO 2 (B) The size, mor...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More 
