High-performance lithium ion battery and preparation process thereof

A lithium-ion battery, high-performance technology, applied in battery electrodes, secondary batteries, battery pack components, etc., can solve problems such as poor mechanical strength of electrolytes, unreported related technologies, and easy loss of protective functions, to prevent The effect of short circuit of lithium ion electrodes, ensuring safety performance, and excellent lithium ion mobility

Inactive Publication Date: 2012-02-08
LUNAN RES INST OF COAL CHEM
View PDF11 Cites 71 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 101237036 B in-situ coated polyaniline on the surface of lithium iron phosphate powder, the positive electrode material of lithium ion battery, but the charge and discharge performance of the obtained lithium ion battery was not good at high rate
Chinese patent CN 101714460A composites an acrylic polymer with a conductive polypyrrole, and then absorbs a liquid electrolyte into the compound to obtain a polypyrrole/polyacrylic acid composite gel electrolyte. The electrolyte has high conductivity, but the mechanical properties of the electrolyte poor strength
[0007] Lithium-ion batterie

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

[0027] Add 8 g of lithium nickelate to 2 L of graphene aqueous solution with a concentration of 0.1 g / L, and perform emulsification treatment at 10° C. for 2 h to obtain an aqueous dispersion of electrode materials composited with graphene. Then, add 8 g of aniline and 400 g of polystyrenesulfonic acid to the obtained aqueous dispersion, stir evenly, and slowly drop 85.7 mL of ammonium persulfate aqueous solution with a concentration of 280 g / L at a reaction temperature of 50° C., keep stirring, and react for 1 h Afterwards, it was suction filtered and washed until the filtrate was colorless, and the filter cake was dried at 60° C. and crushed to obtain the positive electrode material. Replace the lithium nickelate with natural graphite, and repeat the above steps to obtain the negative electrode material.

[0028] Lithium tetrafluoroborate and propylene carbonate were formulated into a liquid electrolyte with a conductive salt concentration of 20 g / L. Adding nano silicon oxi...

Embodiment 2

[0033] Add 8 g of lithium manganate to 160 mL of graphene oxide aqueous dispersion with a concentration of 10 g / L, and perform ultrasonic treatment at 80° C. for 24 hours to obtain an aqueous dispersion of electrode materials composited with graphene oxide. Then add 2.4g aniline, 0.4g concentrated hydrochloric acid and 9.8g p-toluenesulfonic acid respectively in the obtained aqueous dispersion liquid, stir well, slowly drip into 20mL concentration be the ammonium persulfate aqueous solution of 180g / L at reaction temperature at 0 ℃, Stir continuously, after reacting for 24 hours, filter with suction and wash until the filtrate is colorless, dry the filter cake at 100°C, and pulverize to obtain the positive electrode material. Lithium manganate was replaced by MCMB, and the above operation steps were repeated to obtain the negative electrode material.

[0034] Lithium bisoxalate borate and propylene carbonate were formulated into a liquid electrolyte with a conductive salt conce...

Embodiment 3

[0039] Add 8 g of lithium cobaltate to 500 mL of graphene aqueous solution with a concentration of 1.5 g / L, and perform emulsification treatment at 25 ° C for 2 h, and then ultrasonic treatment for 2 h to obtain an aqueous dispersion of electrode materials composited with graphene. Then add 2.4g aniline and 5g sulfosalicylic acid respectively in the obtained aqueous dispersion liquid, stir well, slowly drop into 25.8mL concentration be the ammonium persulfate aqueous solution of 228g / L under reaction temperature 20 ℃, constantly stir, react After 4 hours, it was filtered with suction and washed until the filtrate was colorless. The filter cake was dried at 80° C. and crushed to obtain the positive electrode material. Replace the lithium cobaltate with carbon nanotubes, repeat the above operation steps, and obtain the negative electrode material.

[0040] Lithium hexafluorophosphate, dimethyl carbonate, diethyl carbonate, and ethylene carbonate were formulated into a liquid ele...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Apertureaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a high-performance lithium ion battery. According to the battery, an electrode material is subjected to a nano-composite treatment of grapheme and polyaniline; an anode current collector comprises aluminium foil; a cathode current collector comprises copper foil; a conductive agent comprises superconducting carbon black, conductive graphite or acetylene black; a binding agent comprises styrene butadiene rubber, carboxymethylcellulose sodium, polytetrafluoroethylene, polyvinylidene difluoride or hydroxy propyl methylcellulose; a electrolyte comprises liquid electrolyte or a polymer electrolyte containing a conductive polymer, a nano-material, or a mixture comprising the conductive polymer and the nano-material; a membrane is subjected to a high temperature resistant insulation coating treatment, or directly adopts a high temperature resistant insulating porous polymer matrix. A preparation process for the high-performance lithium ion battery comprises: material preparing, coating, drying, rolling, slicing, coil winding or sheet stacking, assembling, liquid injecting, formation and capacity distributing. The lithium ion battery provided by the present invention has characteristics of excellent charge and discharge performance at the large rate, small capacity fading, good heat stability, good safety performance and long electrode cycle life, and can be widely applicable for the fields of electric bicycles, electric motorcycles, electric cars and the like.

Description

technical field [0001] The invention relates to a battery, in particular to a high-performance lithium ion battery and a manufacturing process thereof. Background technique [0002] Compared with other batteries, lithium-ion batteries have the advantages of light weight, small size, high average voltage, high energy density, high output power, high charging efficiency, no memory effect, long cycle life, wide operating temperature, and small self-discharge. It has been widely used in the fields of computers and notebook computers. However, there are still many technical bottlenecks in lithium-ion batteries at present, such as: with the increase of the number of cycles, the battery capacity decays greatly; the anti-overcharge performance is poor; the thermal stability is poor, and there are potential safety hazards; the charge and discharge performance at high rates is poor. , the development and application of large-scale lithium-ion batteries such as electric vehicle batter...

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
IPC IPC(8): H01M4/139H01M2/16H01M10/0567
CPCY02E60/10
Inventor 曾永斌赖日萱曾阳生顾晓峰何学艺
Owner LUNAN RES INST OF COAL CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap