Method for preparing ultra-small oxide and carbon compounded lithium battery negative electrode material by microwave method

A negative electrode material and oxide technology, which is applied in the direction of battery electrodes, active material electrodes, negative electrodes, etc., can solve the problems of low comprehensive performance such as lithium-ion battery capacity and conductivity, complicated preparation process, and high cost, and achieve high capacity. and cycle stability, simple preparation process and low cost

Pending Publication Date: 2021-11-19
HARBIN INST OF TECH
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Problems solved by technology

[0006] In order to solve the technical problem that the existing lithium-ion battery capacity and conductivity are not high, and the preparation process is relatively complicated and

Method used

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  • Method for preparing ultra-small oxide and carbon compounded lithium battery negative electrode material by microwave method
  • Method for preparing ultra-small oxide and carbon compounded lithium battery negative electrode material by microwave method
  • Method for preparing ultra-small oxide and carbon compounded lithium battery negative electrode material by microwave method

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specific Embodiment approach 1

[0046] DETAILED DESCRIPTION OF THE INVENTION First: A method of preparing an ultra-small oxide and a carbon composite of a microwave method according to a microwave method of the present embodiment performs according to the following procedure:

[0047] 1. Soak 200mg of ZIF-8 soak in a concentration of 0.22 mol / L at 600 rpm. Sncl 2 · 2h 2 In the N-methylpyrrolidanone solution, soaking 2 h, the mixture was stirred at 600 rpm to obtain a mixed solution, and the solid phase was dried at 60 ° C for 1 h, and the ZIF-8 powder of the pericine ion was obtained.

[0048] Second, 60 mg of the ZIF-8 powder of 60 mg of pericine ions is mixed with 15 mg of graphene powder and then ground for 20 min, then the abrasive product is heated under 750 W, and the mixed powder is obtained;

[0049]Third, the two step obtained mixed powder was placed in the nitric acid solution soaking 2h, complete cleaning, after suction filtration and dried at 60 deg.] C IH, to obtain ultra-small carbon composite ox...

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Abstract

The invention relates to a method for preparing an ultra-small oxide and carbon compounded lithium battery negative electrode material by a microwave method. The invention belongs to the field of preparation of lithium ion battery negative electrode materials. The invention aims to solve the technical problems that the existing lithium ion battery is low in comprehensive performance such as capacity and conductivity, the preparation process is relatively complicated, and the cost is relatively high. The method comprises the following steps: 1, preparing a salt solution to enable metal ions to permeate into a metal-organic framework (MOF) material; separating the ion-permeated MOF material from the solution by suction filtration, and drying to obtain an ion-permeated MOF material; 2, mixing the ion-permeated MOF material and graphene, grinding, and then carrying out microwave short-time heating; and 3, washing and removing impurities from the product to obtain the ultra-small oxide and carbon compounded lithium battery negative electrode material. The nano-particle size of the product is 2-10nm, and the product can have high capacity under low oxide loading.

Description

Technical field [0001] The present invention belongs to the field of preparation of a lithium ion battery negative electrode material; therefore relates to a method of preparing an ultra-small oxide and carbon composite lithium battery anode material. Background technique [0002] The energy density of lithium-ion battery is high, the green environmental protection, and the memory effect is small, so it is widely used in small equipment such as mobile phones, cameras, and the core energy storage components of electric vehicles. The application of lithium-ion batteries is conducive to reducing the use of fossil energy, thereby promoting energy crisis, environmental problems, and promoting sustainable development. Development of lithium-ion batteries is an important topic today, using material design to improve battery performance is the key. [0003] Electrode material is a core point affecting the performance of lithium ion battery. The negative electrode material used in current...

Claims

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Application Information

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IPC IPC(8): C01G19/02C01B32/184H01M4/36H01M4/48H01M4/62H01M10/0525
CPCC01G19/02C01B32/184H01M4/366H01M4/483H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/027C01P2004/03C01P2004/04C01P2002/72C01P2002/88C01P2002/82C01P2006/40C01P2004/80C01P2004/62C01P2002/77Y02E60/10
Inventor 黄小萧刘力铭卫增岩段小明张洪磊贾德昌
Owner HARBIN INST OF TECH
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