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Carbon coating method for non-carbon anode materials

A negative electrode material, carbon coating technology, applied in the direction of negative electrode, battery electrode, active material electrode, etc., can solve the problem of poor uniformity of carbon coating layer

Active Publication Date: 2019-01-11
SOUNDON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a carbon coating method for non-carbon negative electrode materials, so as to alleviate the poor uniformity of the carbon coating layer in the prior art when directly utilizing the liquid phase coating method for carbon coating of non-carbon negative electrode materials question

Method used

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  • Carbon coating method for non-carbon anode materials

Examples

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Embodiment 1

[0043] This embodiment is a carbon coating method of silicon oxide, comprising the following steps:

[0044] Step s1: Weigh 10g of SiO 2 Put it into the rotary furnace, pass in argon protective gas, raise the temperature of the rotary furnace to 1200 °C at a rate of 5 °C / min; turn on the rotation of the rotary furnace, set the speed at 10 r / min, close the argon valve, and turn on the carbon source gas Valve, so that ethylene gas enters the rotary furnace at a flow rate of 0.1L / min, and reacts for 30 minutes to end the reaction; close the carbon source gas valve, open the argon valve, and take out the material after the argon gas protection drops to room temperature to obtain SiO 2 / C1 composite material;

[0045] Step s2: Weigh 2g sucrose and 3.4g SiO 2 / C1 composite material, first dissolve sucrose in 20ml ethanol solvent to form a homogeneous solution, then add SiO to the solution 2 / C1 composite material, fully stirred to form a dispersion;

[0046] Step s3: Heat the di...

Embodiment 2

[0053] This embodiment is a carbon coating method of SnO, comprising the following steps:

[0054] Step s1: Weigh 10g of SnO into the rotary furnace, pass in argon protective gas, and raise the temperature of the rotary furnace to 1200°C at a rate of 5°C / min; turn on the rotation of the rotary furnace, and set the speed to 10r / min, Close the argon gas valve, open the carbon source gas valve, let ethane enter the rotary furnace at a flow rate of 0.1L / min, and react for 30 minutes to end the reaction; close the carbon source gas valve, open the argon gas valve, and after the argon protection drops to room temperature, Take out the material to obtain the SnO / C1 composite material;

[0055] Step s2: Weighing 2g of glucose and 3.6g of SnO / C1 composite material, first dissolving the glucose in 20ml of ethanol solvent to form a homogeneous solution, then adding the SnO / C1 composite material into the solution, and fully stirring to form a dispersion;

[0056] Step s3: heat the disper...

Embodiment 3

[0064] This embodiment is a carbon coating method for silicon, comprising the following steps:

[0065] Step s1: Weigh 10g of Si and put it into the rotary furnace, pass in argon, raise the temperature of the rotary furnace to 1200°C at a rate of 5°C / min; turn on the rotation of the rotary furnace, set the speed to 10r / min, and turn off the argon Valve, open the carbon source gas valve, let ethylene gas enter the rotary furnace at a flow rate of 0.1L / min, and react for 20 minutes to end the reaction; close the carbon source gas valve, open the argon valve, and take out the material after the argon protection drops to room temperature to obtain Si / C1 composite material;

[0066] Step s2: Weighing 2g of glucose and 3.6g of Si / C1 composite material, first dissolving glucose in 20ml of ethanol solvent to form a homogeneous solution, then adding Si / C1 composite material into the solution, and fully stirring to form a dispersion;

[0067] Step s3: heat the dispersion liquid, and af...

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Abstract

The invention provides a carbon coating method of a non-carbon negative electrode material, which relates to the technical field of material preparation. The carbon coating method of the non-carbon negative electrode material comprises the following steps: (A) a first carbon layer is coated on the surface of the non-carbon negative electrode material by a vapor phase coating method to obtain a precursor; B) coat a second carbon layer on that surface of the precursor by a liquid-phase coat method to complete the carbon coating of the non-carbon negative electrode material. The carbon coating method can alleviate the technical problem that the uniformity of the carbon coating layer is poor when the liquid phase coating method is directly used for the carbon coating of the non-carbon negativeelectrode material.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a carbon coating method of a non-carbon negative electrode material. Background technique [0002] Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, electrolytes, separators and other auxiliary materials. The specific capacity of positive and negative electrode materials directly determines the energy density of the battery. The theoretical specific capacity of graphite as the anode material of lithium-ion batteries is 372mAh / g, and the currently applicable commercial graphite has exceeded 360mAh / g, which is very close to its theoretical value, and there is no obvious room for improvement. [0003] Some non-carbon anode materials, including silicon, silicon-based composite materials and oxide semiconductor materials, specifically, such as Si, SiOx (1≤x≤2), Sn, SnO, SnO 2 、MoO 2 、Co 3 o 4 、TiO 2 etc., have a ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/38H01M4/62H01M10/0525
CPCH01M4/366H01M4/386H01M4/48H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 唐其伟朱坤磊苗力孝李现化徐艳红
Owner SOUNDON NEW ENERGY TECH CO LTD
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