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A kind of preparation method of high rate lithium ion battery negative electrode material

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor rate performance, and achieve the effects of improved rate performance, enhanced conductivity and electrical contact, and precise control

Inactive Publication Date: 2015-10-14
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a high-rate lithium-ion battery negative electrode material in order to solve the disadvantage of poor rate performance of the existing lithium-ion battery negative electrode material under the high-current charge-discharge system

Method used

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  • A kind of preparation method of high rate lithium ion battery negative electrode material
  • A kind of preparation method of high rate lithium ion battery negative electrode material

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Embodiment 1

[0024] A preparation method of a high-rate lithium-ion battery negative electrode material, the specific steps are:

[0025] 1) First mix 2g of polyacrylonitrile (PAN), 2g of zinc acetate (Zn(CH 3 COO) 2 2H 2 O) and 1g copper acetate (Cu(CH 2 COO) 2 2H 2 O) Add 20mL of N-N-dimethylformamide (DMF) solution, stir continuously at 50°C to dissolve completely, and the solution is transparent;

[0026] 2) Inhale the solution obtained above into the syringe and move it to the electrospinning equipment (SS-2534), under high voltage, the advancing speed is 0.6mLh -1 , using aluminum foil as a collector to collect spray products;

[0027] 3) After the solution is sprayed completely, remove the collected film from the aluminum foil and transfer it to a vacuum drying oven for drying;

[0028] 4) The dried product was first heated to 280°C for 1 hour under an air atmosphere, and then heated to 600°C for 2 hours under an argon atmosphere. After the reaction is finished, the product ...

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Abstract

The invention relates to a high-multiplying-power lithium ion battery negative-electrode material and a preparation method thereof, and belongs to the field of chemical power supply materials. The preparation method is characterized in that conductive medium and zinc oxide grow on a carbon nanometer fiber in situ through the electrostatic spinning and subsequent heat treatment to prepare a zinc oxide / conductive medium / carbon nanometer fiber composite material. Under the large-current system charging-discharging condition, the lithium ion can be enabled to be rapidly transferred on a composite material electrode through the excellent electron conduction capacity of the conductive medium, so that the multiplying power performance of the zinc oxide-base negative-electrode material can be greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a high-rate lithium ion battery, belonging to the field of chemical power source materials. Background technique [0002] Lithium-ion batteries (LIBs) play a market-leading role in clean energy storage, especially in today's portable devices such as smartphones, iPhones, and laptops. Although LIBs have many advantages, such as no memory effect, safety and pollution-free, and high specific capacity, the current development of electric vehicles has triggered better requirements for the performance of LIBs, especially its high-current charge-discharge rate performance. The unsatisfactory rate performance of current LIBs is mainly caused by the slower electrochemical reactions at the electrode-electrolyte interface and poor Li-ion conductivity during charge and discharge. Transition metal oxides TMOs (ZnO, CuO, Fe 2 o 3 、Co 3 o 4 etc.) are a class of inorganic materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1393H01M4/38
CPCY02E60/122H01M4/48H01M4/625H01M4/626H01M4/628Y02E60/10
Inventor 穆道斌沈雪阳陈实吴锋吴伯荣黄荣赵章宏陶丹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY