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One-step method for preparing metal oxide@chlorine-doped graphene lithium-ion battery anode materials

A lithium-ion battery, graphene technology, applied in battery electrodes, active material electrodes, negative electrodes, etc., can solve the problems of poor consistency of negative electrode materials, cumbersome methods, etc., and achieve the advantages of simple method, reduced preparation time, and good cycle stability. Effect

Active Publication Date: 2021-07-20
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional method of preparing metal oxide@carbon material composite material is cumbersome, resulting in poor consistency of negative electrode materials, and provides a simple, safe and low-cost method for preparing metal oxide / chlorine doped Graphene lithium ion battery anode material

Method used

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  • One-step method for preparing metal oxide@chlorine-doped graphene lithium-ion battery anode materials
  • One-step method for preparing metal oxide@chlorine-doped graphene lithium-ion battery anode materials
  • One-step method for preparing metal oxide@chlorine-doped graphene lithium-ion battery anode materials

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Embodiment 1

[0045] Example 1: A method of preparing a metal oxide @ chlorine glycene graphene lithium ion battery in this example, wherein the preparation method is performed as follows:

[0046] Step 1, 0.4 g of oxide oxide (GO) was added to 20 mlN-methylpyrrolidone (NMP), stirred at 500 rpm at a rate of 20 kHz, and the ultrasonic frequency was ultrasonic for 1 h, and a uniform GO slurry was obtained;

[0047] Step 2, 0.375g SNCL 2 In 5 mlN-methylpyrrolidone (NMP), slowly added to the GO slurry, stirring at a rate of 500 rpm at a rate of 500 rpm, resulting in SNCL 2 @GO gel;

[0048] Step three, put SNCL 2 @GO gel is evenly coated on the copper foil (the film thickness is about 200 um), and after drying in a diameter of ф 12 mm, then place the tube furnace, 390 under argon. Calcination 2 h at ° C to give a lithium ion battery negative electrode material (SNO 2 @ RGO-CL negative material).

[0049] SNO prepared in this example 2 @ RGO-CL negative electrode material metal oxide SNO 2 For the q...

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Abstract

The invention discloses a method for preparing a metal oxide@chlorine-doped graphene lithium-ion battery negative electrode material in one step, belonging to the field of lithium-ion battery negative electrode preparation. The invention aims to solve the problem that the traditional coating process is complex, resulting in poor consistency of negative electrode materials. The method of the present invention: 1. disperse graphene oxide (GO) uniformly in an organic solvent to obtain a GO slurry; 2. dissolve the metal source in an organic solvent, slowly add it to the GO slurry, and stir at room temperature for at least 10 h. Obtain the gel; 3. Coat the gel evenly on the copper foil, cut it after drying, and calcinate under the protection of inert gas to obtain the metal oxide@chlorine-doped graphene composite material. The invention uses a simple process and one-step low-temperature preparation of the negative electrode material, which greatly improves the cycle stability of the negative electrode material; when discharged at 0.2C, the discharge capacity can reach up to 600mAh g ‑1 , no attenuation was seen after 80 cycles.

Description

Technical field [0001] The present invention belongs to the preparation of a lithium ion battery negative electrode material; a method of preparing a metal oxide @ chlorine glycene graphene lithium ion battery with a first step. Background technique [0002] According to the US energy department, the world oil can also be balanced in the next 20 years, but 20 years later, it is necessary to face the situation of lack of oil. With the increasing consumption of non-renewable resources such as coal, oil, natural gas and the environmental pollution caused by combustion, energy and environmental issues have gradually become an important issue affecting the sustainable development of the world. In order to solve this problem, all countries in the world have put into new energy development in development, seeking efficient renewable green energy, such as the promotion of new energy pure electric vehicles and hybrid vehicles, key issues in the promotion of electric vehicles, the key issu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/366H01M4/48H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 黄小萧刘冬冬张晓东温广武
Owner HARBIN INST OF TECH
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