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Lithium ion battery cathode material of which nano particles embedded into carbon nanosheet and preparation method of lithium ion battery cathode material

A lithium-ion battery and carbon nanosheet technology, applied in the field of electrochemistry, can solve the problems of poor cycle performance of nanoparticles, and achieve the effects of good cycle ability, high capacity and good cycle performance.

Inactive Publication Date: 2016-03-30
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanoparticle-embedded carbon nanosheet lithium-ion battery negative electrode material proposed by the present invention is not a simple composite of nanoparticles and carbon nanosheets, but nanoparticles are evenly embedded in carbon nanosheets, and the nanoparticles and carbon nanosheets are closely combined, which is not easy Exfoliation, and has good electronic conductivity and ion conductivity, by overcoming the technical problem of poor cycle performance of nanoparticles, the capacity of graphite negative electrode has been improved

Method used

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  • Lithium ion battery cathode material of which nano particles embedded into carbon nanosheet and preparation method of lithium ion battery cathode material
  • Lithium ion battery cathode material of which nano particles embedded into carbon nanosheet and preparation method of lithium ion battery cathode material

Examples

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Embodiment 1

[0026] The preparation method of nano-metal tin particles embedded in carbon nano-sheet lithium ion battery anode material includes the following steps:

[0027] (1) Precursor preparation: Take citric acid as the carbon source, commercial micron metal tin as the particle source, and sodium chloride as the template, weigh 0.6 g commercial micron metal tin, 3 g citric acid and 30 g sodium chloride , Put into a ball mill tank, add 10 mL of distilled water, ball mill at a speed of 500 rpm for 20 hours, put the obtained mixture in an oven, dry at 80°C, and put it in a tube furnace.

[0028] (2) Precursor pyrolysis treatment: The prepared precursor samples are evenly spread on the bottom of the burning boat, and the burning boat is placed in the constant temperature zone of the tube furnace. Nitrogen gas is first introduced for 30 minutes to remove the air in the tube furnace, and then The mixed gas of argon and hydrogen is programmed to heat up to 750°C at 2°C / min for carbonization, kep...

Embodiment 2

[0031] Similar to Example 1, the difference is that the method for preparing the precursor in step (1) of this example is: using sodium citrate as a carbon source, commercial micron-sized metal tin as a particle source, and sodium chloride as a template. Take 0.6g of commercial micron metal tin, 3g of sodium citrate and 30g of sodium chloride, put them into a ball mill tank, add 10mL of distilled water, ball mill at 500rpm for 20h, put the resulting mixture in an oven, and dry at 80°C Put it in a tube furnace.

Embodiment 3

[0033] Similar to Example 1, the difference is that the method for preparing the precursor in step (1) of this example is as follows: sodium citrate is used as a carbon source, commercial micron-sized silicon powder is used as a particle source, and sodium chloride is used as a template. Take 0.6g of commercial micron silicon powder, 3g of sodium citrate and 30g of sodium chloride, put them in a ball milling tank, add 10mL of distilled water, and ball mill at 500rpm for 20h. Put the resulting mixture in an oven and dry at 80°C. Put it in a tube furnace.

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Abstract

The invention discloses a lithium ion battery cathode material of which nano particles are embedded into a carbon nanosheet and a preparation method of the lithium ion battery cathode material, which belong to the technical field of electrochemistry. According to the method, water-soluble organic matter (glucose, saccharose, fructose, citric acid, sodium citrate and the like) is used as a carbon source, commercial submicron particles (such as metallic tin, stibium, germanium, nonmetallic silicon and the like) are used as a particle source, sodium chloride is used as a template, the carbon source, the submicron particles and the sodium chloride are added into a ball milling tank for ball milling according to a proper proportion, and a mixture is dried and calcined. A simple ball milling method and a pyrolysis method are used for preparing the lithium ion battery cathode material of which the nano particles are uniformly embedded into the carbon nanosheet. According to the lithium ion battery cathode material of which the nano particles are uniformly embedded into the carbon nanosheet, the specific surface area is large, the surface is of a porous structure, the preparation method is simple, and the lithium ion battery cathode material has good circulation and rate performance.

Description

Technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to a lithium ion battery negative electrode material, in particular to a method for preparing a lithium ion battery negative electrode material with nano particles embedded in carbon nanosheets. The nanoparticles prepared by the method are uniformly embedded in carbon nanosheets, And its application as a negative electrode material for lithium-ion batteries. Background technique [0002] With the rapid economic development, energy issues have become one of the important factors restricting social development. As a new type of secondary energy, lithium-ion batteries have developed rapidly in recent years and have been widely used due to their excellent characteristics such as high energy density, low self-discharge, high working voltage, long cycle life, no memory effect and no environmental pollution. It is considered to be one of the most effective energy storage me...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/133H01M4/1393H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/133H01M4/1393H01M4/362H01M4/583H01M10/0525Y02E60/10
Inventor 王红强潘齐常李庆余黄有国季成林喜乐
Owner GUANGXI NORMAL UNIV
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