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Preparation method of negative material of lithium-ion battery for portable game machine

A lithium-ion battery and anode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high manufacturing cost, limited large-scale application, low capacity, etc., achieve high graphite cycle performance and improve energy density , the effect of prolonging the service life

Active Publication Date: 2013-07-10
JIANGXI DIBIKE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Artificial graphite has advantages in cycle performance and rate performance, but its low capacity and high manufacturing cost greatly limit its large-scale application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The natural graphite material is crushed by a pulverizer to a particle size below 5μm, and the specific surface area is 100-200m 2 / g, then add potassium borate, the weight of the added additive is 3% of the raw material, mix in the mixer for 4 hours, put the mixed material in the graphitization furnace for purification and graphitization, and continue to feed chlorine gas at 3100 °C, Remove metal impurities in the graphite, put it into a ball mill after cooling, ball mill for 6 hours at a speed of 400 rpm, and pass through a 100-mesh sieve to obtain the processed graphite material.

[0032] Dissolve lead nitrate in toluene to obtain a concentration of 10wt% lead nitrate solution, dissolve epoxy resin in ethylene glycol to obtain a concentration of 15wt% epoxy resin solution, and dissolve ammonia in ethanol to obtain a concentration of 10wt% % solution Ammonia solution.

[0033] The lead nitrate solution and the epoxy resin solution are mixed uniformly according to the...

Embodiment 2

[0042] The natural graphite material is crushed by a pulverizer to a particle size below 5μm, and the specific surface area is 100-200m 2 / g, then add potassium borate, the weight of the added additive is 4% of the raw material, mix in the mixer for 6 hours, put the mixed material in the graphitization furnace for purification and graphitization, and continue to feed chlorine gas at 3300 °C, Remove the metal impurities in the graphite, put it into a ball mill after cooling, ball mill for 4 hours at a speed of 500 rpm, and pass through a 100-mesh sieve to obtain the processed graphite material.

[0043] Dissolve lead nitrate in toluene to obtain a concentration of 25wt% lead nitrate solution, dissolve epoxy resin in ethylene glycol to obtain a concentration of 20wt% epoxy resin solution, and dissolve ammonia in ethanol to obtain a concentration of 15wt% % solution Ammonia solution.

[0044] The lead nitrate solution and the epoxy resin solution are mixed uniformly according to...

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Abstract

The invention relates to a preparation method of a negative material of a lithium-ion battery for a portable game machine. The preparation method is characterized by comprising the following steps of: (1) processing natural graphite; (2) preparing a gel / graphite mixed system; (3) carbonizing the gel / graphite mixed system to obtain a lead / graphite composite material; and (4) preparing the negative composite material from the lead / graphite composite material, lignin, polyvinyl-difluoride and conductive carbon black according to a weight ratio. The graphite material prepared by a specific process and metal lead are compounded into the lead / graphite system with uniformity in combination and a stable structure by wet method reaction and a gel process, the cycle performance and high rate property of graphite are maintained, and meanwhile, the energy density of the material is greatly improved. When the lithium-ion battery prepared from the material is used for the portable game machine, the requirements of users on long life, fast charge and safe use of the battery, and prolonged service life of the game machine are met.

Description

[0001] technical field [0002] The invention relates to the field of power supplies of portable game machines, in particular to a preparation method for negative electrode materials of lithium ion batteries used in portable game machines. [0003] Background technique [0004] As a popular digital electronic product, electronic game consoles are increasingly becoming miniaturized and portable. A typical example is the PSP game console. At the same time, people's requirements for the battery life of portable game consoles are getting higher and higher. The requirements for the charging rate and service life of the battery are also getting higher and higher. [0005] Lithium-ion battery, as a new type of secondary battery, has the characteristics of high specific capacity, high voltage, and good safety, and has become the battery of choice for portable game consoles. When selecting a battery for a portable game console, the main considerations are capacity, battery cycle st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/38
CPCY02E60/10
Inventor 严红飞
Owner JIANGXI DIBIKE
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