Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for manufacturing tin-carbon anode composite material of lithium battery

A composite material and lithium battery technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as potential safety hazards, poor electrode cycle stability, and easy pulverization of materials, and achieve long service life, high capacity, and high The effect of mass-to-capacity

Inactive Publication Date: 2013-01-23
SHANGHAI JINZHONG INFORMATION TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, tin-carbon anode materials have become an important research and development direction for lithium batteries. Like other metal-based materials, tin-carbon anode materials have serious volume effects in the process of deintercalating lithium, resulting in stable electrode cycles. Poor performance, the material is easy to pulverize during the electrochemical cycle, causing serious safety hazards

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Configure the reaction solution

[0021] SnCl 3 Dissolve in toluene to obtain solution 1 with a concentration of 20wt%, dissolve epoxy resin in n-butanol to obtain solution 2 with a concentration of 10wt%; dissolve ammonia in a mixture of ethylene glycol to obtain a concentration of 10wt% Solution 3.

[0022] The reaction yields a gel / carbon system

[0023] Mix solution 1 and solution 2 uniformly to obtain solution 4; add carbon black powder with a particle size of 10 μm into solution 4 and stir vigorously to obtain solid-liquid mixture slurry 5, and heat the mixture slurry to 5 to 80°C while stirring, And add solution 3 dropwise in this mixture slurry, in the process of dropping, solution compound material becomes sol compound material, the viscosity of whole system constantly increases, and solution 3 is added dropwise till whole system becomes gelatinous, A gel / carbon hybrid system is obtained;

[0024] dry

[0025] Transfer the gel / graphite mixed system i...

Embodiment 2

[0029] Configure the reaction solution

[0030] SnCl 3 Dissolve in toluene to obtain solution 1 with a concentration of 30wt%, dissolve epoxy resin in n-butanol to obtain solution 2 with a concentration of 12wt%; dissolve ammonia in a mixture of ethylene glycol to obtain a concentration of 15wt% Solution 3.

[0031] The reaction yields a gel / carbon system

[0032] Mix solution 1 and solution 2 uniformly to obtain solution 4; add carbon black powder with a particle size of 20 μm into solution 4 and stir vigorously to obtain solid-liquid mixture slurry 5, and heat the mixture slurry at 5 to 90°C while stirring, And add solution 3 dropwise in this mixture slurry, in the process of dropping, solution compound material becomes sol compound material, the viscosity of whole system constantly increases, and solution 3 is added dropwise till whole system becomes gelatinous, A gel / carbon hybrid system is obtained;

[0033] dry

[0034] Transfer the gel / graphite mixed system i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for manufacturing a tin-carbon anode composite material of a lithium battery. The method comprises the following steps of: dissolving SnCl3 in toluene to obtain a first solution, dissolving an epoxy resin in n-butyl alcohol to obtain a second solution, and dissolving ammonia water to a mixture of ethylene glycol to obtain a third solution; uniformly mixing the first solution and the second solution to obtain a fourth solution, adding carbon black powder into the fourth solution, powerfully and uniformly stirring to obtain solid-liquid mixture slurry 5, heating the solid-liquid mixture slurry 5 while stirring, dropping the third solution into the mixture slurry until the whole system is gelatinous to obtain a gel / carbon mixed system; and drying, heating and carbonizing to obtain the tin-carbon nano composite material. By adoption of a gel method and the specific raw material ratio, the manufactured tin-carbon anode composite material has high cycling stability and high quality specific capacity, and when used in a lithium ion battery, the tin-carbon anode composite material is high in capacity, high in cycling stability and long in service life.

Description

technical field [0001] The invention relates to a method for preparing a negative electrode material for a battery, in particular to a method for preparing a tin-carbon negative electrode composite material for a lithium battery. Background technique [0002] Due to its high energy density and good cycle performance, lithium-ion batteries have been widely used since their commercialization, gradually replacing traditional chemical power sources such as lead-acid batteries. The application of lithium-ion batteries largely depends on the stability of its charge-discharge cycle. Like other secondary batteries, the capacity fading of lithium-ion batteries during the cycle is unavoidable. Since overcharge or overdischarge, electrolyte decomposition, SEI film formation, active material dissolution and other factors will lead to battery capacity loss during the charging and discharging process of lithium-ion batteries, it is necessary to analyze the causes of lithium-ion battery ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38
CPCY02E60/12Y02E60/10
Inventor 姜波
Owner SHANGHAI JINZHONG INFORMATION TECH