Preparation method of zinc oxide nanometer fiber cathode material for lithium ion battery

A zinc oxide nanometer, lithium-ion battery technology, applied in the fields of polymer materials and chemical power sources, can solve the problems of poor cycle stability, rapid charge and discharge ability, low first cycle efficiency, etc., and achieves simple and easy-to-control preparation process, high initial Effects of discharge capacity and cycle stability, low production cost

Inactive Publication Date: 2013-06-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned zinc oxide nanorods as the negative electrode material of lithium ion batteries, such as low initial cycle efficiency, poor cycle stability and rapid charge and discharge ability, and provide a zinc oxide nanofiber negative electrode material for lithium ion batteries and its preparation method; it is required to improve the first-time cycle efficiency and rapid charge and discharge capacity, and at the same time, the method has low processing cost, simple and easy control process, short cycle, high efficiency and energy saving, and is convenient for further expanding production

Method used

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  • Preparation method of zinc oxide nanometer fiber cathode material for lithium ion battery
  • Preparation method of zinc oxide nanometer fiber cathode material for lithium ion battery

Examples

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Embodiment 1

[0018] Weigh PAN 1.4g, PVP 0.6g (PAN / PVP=7:3), (CH 3 COO) 2 Zn 1.0g, then added to 23ml of DMF solution, stirred with a glass rod for about 20min until completely uniform swelling. Then the mixed solution was transferred to a 50ml Erlenmeyer flask, put into a magnetic rotor, adjusted to an appropriate rotational speed, and stirred at room temperature for 24 hours. The above-mentioned spinning solution prepared is put into self-made spinning equipment, under the process conditions of spinning voltage 10kV, collecting distance 8cm, solution extrusion speed 0.3ml / h, spinning for 10 hours, then drying in a vacuum oven for 2 hour, get PAN / PVP / (CH 3 COO) 2 Zn composite nanofibrous membrane. The above PAN / PVP / (CH 3 COO) 2 The Zn composite nanofiber membrane was transferred to a high-temperature tube furnace, heated from room temperature to 600 °C in an air atmosphere at a heating rate of 0.5 °C / min, and naturally cooled to room temperature after calcination.

Embodiment 2

[0020] Weigh PAN 1.4g, PVP 0.6g (PAN / PVP=7:3), (CH 3 COO) 2 Zn 1.0g, then added to 23ml of DMF solution, stirred with a glass rod for about 20min until completely uniform swelling. Then the mixed solution was transferred to a 50ml Erlenmeyer flask, put into a magnetic rotor, adjusted to an appropriate rotational speed, and stirred at room temperature for 24 hours. The above-mentioned spinning solution prepared is put into self-made spinning equipment, under the process conditions of spinning voltage 10kV, collecting distance 12cm, solution extrusion speed 0.5ml / h, spinning for 10 hours, then drying in a vacuum oven for 2 hour, get PAN / PVP / (CH 3 COO) 2 Zn composite nanofibrous membrane. The above PAN / PVP / (CH 3 COO) 2 The Zn composite nanofiber membrane was transferred to a high-temperature tube furnace, heated from room temperature to 600 °C in an air atmosphere at a heating rate of 1.5 °C / min, and naturally cooled to room temperature after calcination.

Embodiment 3

[0022] Weigh PAN 1.4g, PVP 0.6g (PAN / PVP=7:3), (CH 3 COO) 2 Zn 1.0g, then added to 23ml of DMF solution, stirred with a glass rod for about 20min until completely uniform swelling. Then the mixed solution was transferred to a 50ml Erlenmeyer flask, put into a magnetic rotor, adjusted to an appropriate rotational speed, and stirred at room temperature for 24 hours. The above-mentioned spinning solution prepared is put into self-made spinning equipment, under the process conditions of spinning voltage 12kV, collection distance 15cm, solution extrusion speed 1.0ml / h, spinning for 10 hours, then drying in a vacuum oven for 2 hour, get PAN / PVP / (CH 3 COO) 2 Zn composite nanofibrous membrane. The above PAN / PVP / (CH 3 COO) 2 The Zn composite nanofiber membrane was transferred to a high-temperature tube furnace, heated from room temperature to 700 °C in an air atmosphere, and the heating rate was 0.5 °C / min, and naturally cooled to room temperature after calcination.

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Abstract

A zinc oxide nanometer fiber cathode material for lithium ion battery and a preparation method thereof belong to the technical fields of high polymer material and chemical power source. The zinc oxide nanometer fiber material for lithium ion battery provided by the invention has large specific surface area. The method first prepares composite nanometer fiber by electrospinning, and then the nanometer fiber is subjected to high-temperature calcination to obtain the zinc oxide nanometer fiber. The preparation process provided by the invention is simple and easy to control, and has low production cost. The cathode electrode material for lithium ion battery provided by the invention overcomes the disadvantages of zinc oxide nanorod prepared by other methods as cathode material for lithium ion battery, such as low first cycling efficiency, weak cycle stability and high-rate discharge ability. The invention provides a zinc oxide nanometer fiber cathode material for lithium ion battery and the preparation method thereof. The material has high initial discharge capacity and cycling stability, improves high power characteristic and high-rate discharge capacity of cathode material, and is suitable for development requirements of lithium ion power battery for electric vehicles.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and chemical power sources, and in particular relates to a lithium ion battery nanometer negative electrode material and a preparation method, in particular to a lithium ion battery zinc oxide nanofiber negative electrode material and a preparation method. Background technique [0002] In recent years, lithium-ion batteries have developed rapidly due to their high voltage, high volume specific capacity, high mass specific capacity, no memory effect, small self-discharge and other excellent electrochemical properties, long life, safety and pollution-free. It has achieved great success on the Internet and is widely used in many civilian and military fields such as mobile phones, notebook computers, video cameras, digital cameras, Mp3, and PDA. The current commercial lithium-ion battery negative electrodes are basically made of carbon materials, such as graphite, carbon fiber, coke, and pyr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60
CPCY02E60/10
Inventor 乔辉黄锋林魏取福蔡以兵付家鹏陈晨崔静
Owner JIANGNAN UNIV
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