One-step preparation method of metal oxide at chlorine doped graphene anode material for lithium ion battery

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

Active Publication Date: 2018-12-18
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

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  • One-step preparation method of metal oxide at chlorine doped graphene anode material for lithium ion battery
  • One-step preparation method of metal oxide at chlorine doped graphene anode material for lithium ion battery
  • One-step preparation method of metal oxide at chlorine doped graphene anode material for lithium ion battery

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Embodiment 1

[0045] Embodiment 1: the method for preparing metal oxide@chlorine-doped graphene lithium-ion battery negative electrode material in one step in the present embodiment is characterized in that the preparation method is carried out according to the following steps:

[0046] Step 1. Add 0.4g of graphene oxide (GO) into 20mL of N-methylpyrrolidone (NMP), stir at 500rpm for 24h, and ultrasonicate for 1h at an ultrasonic frequency of 20KHz to obtain a uniformly dispersed GO slurry;

[0047] Step two, 0.375g SnCl 2 Dissolved in 5mL N-methylpyrrolidone (NMP), slowly added to the GO slurry, stirred at 500rpm at room temperature for 12h, to obtain SnCl 2 @GO gel;

[0048] Step three, the SnCl 2 @GO gel is evenly coated on the copper foil (the film thickness is about 200um), blown and dried at 70°C for 1 hour, then cut into pole pieces with a diameter of ф12mm, and then placed in a tube furnace, under the protection of argon at 390 ℃ calcination for 2h to obtain lithium-ion battery a...

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Abstract

A method for prepare a metal oxide at chlorine doped graphene lithium ion battery cathode material in one step belong to that preparation field of a lithium ion battery cathode. The invention solves the problem of poor consistency of negative electrode material caused by complex traditional coating process. 1 uniformly disperse graphene oxide (GO) in an organic solvent to obtain GO slurry; 2, dissolve a metal source in an organic solvent, slowly adding that metal source into a GO slurry, and stir at room temperature for at least 10 hours to obtain a gel; 3, uniformly coat that gel on the copper foil, dry, cutting, and calcining under the protection of an inert gas to obtain a metal oxide at chlorine doped graphene composite material. The invention utilizes a simple process to prepare the negative electrode material at a low temperature in one step, thereby greatly improving the cycle stability of the negative electrode material; During discharge at 0.2 C, the discharge capacity is up to 600mAh g-1, no attenuation after 80 turns.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery negative electrode materials; in particular, it relates to a method for preparing metal oxide@chlorine-doped graphene lithium-ion battery negative electrode materials in one step. Background technique [0002] According to the estimates of the U.S. Department of Energy, in the next 20 years, the world's oil supply and demand will still be in balance, but after 20 years, we will face the situation of oil shortage. With the increasing consumption of coal, oil, natural gas and other non-renewable resources and the environmental pollution caused by combustion, energy and environmental issues have gradually become important issues affecting the sustainable development of the world today. In order to solve this problem, countries all over the world have invested heavily in the development of new energy sources, seeking efficient and renewable green energy sources, such as the promotion ...

Claims

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Application Information

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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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