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

High-energy density lithium titanate power battery and preparation method thereof

A high-energy density, power battery technology, applied in electrolyte battery manufacturing, secondary batteries, battery electrodes, etc., can solve the problems that restrict the application of power batteries, affect the working voltage and energy density of the battery, etc., and improve high and low temperature performance and cycle. performance, the effect of improving working voltage and energy density, and high safety performance

Inactive Publication Date: 2016-02-24
SHENZHEN HONGTAI BATTERY TECH
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lithium titanate material has a lithium potential of 1.55V, which is much higher than that of the carbon negative pole, which affects the working voltage and energy density of the battery.
[0005] At present, the positive electrode materials of lithium titanate batteries are mainly lithium manganese oxide, ternary materials, and lithium iron phosphate. Aspects of application

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-energy density lithium titanate power battery and preparation method thereof
  • High-energy density lithium titanate power battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1, see attached figure 1 .

[0047] The preparation of positive and negative electrode slurry is the first step in the manufacturing process of this patented product, and it is also the key to the excellent performance of this patented battery. Attached below figure 1 The middle process I is described separately:

[0048] Preparation of cathode slurry. LiNi coated with ZnO (content 1%) at a mass ratio of 95:5 0.5 mn 1.5 o 4 with Li 3 V 2 (PO 4 ) 3 Mix ball milling for 4-24 hours; dissolve PVDF in NMP to make a glue solution with a mass fraction of 10%; add CNT slurry, disperse at high speed for 1 hour, add S-P and stir at high speed for 1-2 hours; add mixed living things in 3-5 times , stirring for 3-6h; adding a small amount of NMP to adjust the viscosity to 6000-12000cp to obtain the positive electrode slurry to be coated. The ratio of the positive electrode slurry active material, CNT, S-P, and PVDF is 94.5:1.5:1:3.

[0049] Preparation of nega...

Embodiment 2

[0057] Preparation of cathode slurry. LiNi coated with ZnO (content 1%) at a mass ratio of 98:2 0.5 mn 1.5 o 4 with Li 3 V 2 (PO 4 ) 3 Mix ball milling for 4-24 hours; dissolve PVDF in NMP to make a glue solution with a mass fraction of 10%; add CNT slurry, disperse at high speed for 1 hour, add S-P and stir at high speed for 1-2 hours; add mixed living things in 3-5 times , stirring for 3-6h; adding a small amount of NMP to adjust the viscosity to 6000-12000cp to obtain the positive electrode slurry to be coated. The ratio of the positive electrode slurry active material, CNT, S-P, and PVDF is 94.5:1.5:1:3.

[0058] Preparation of negative electrode slurry. Dissolve PVDF in NMP to make a glue solution with a mass fraction of 10%; add CNT slurry, disperse at high speed for 1 hour, add S-P and stir at high speed for 1-2 hours; add carbon-coated lithium titanate material (carbon content 2%), stirring for 3-6h; adding a small amount of NMP to adjust the viscosity to 6000...

Embodiment 3

[0066] Preparation of cathode slurry. Al by mass ratio 95:5 2 o 3 (Content 1%) Coated LiNi 0.5 mn 1.5 o 4 with Li 3 V 2 (PO 4 ) 3 Mix ball milling for 4-24 hours; dissolve PVDF in NMP to make a glue solution with a mass fraction of 10%; add CNT slurry, disperse at high speed for 1 hour, add S-P and stir at high speed for 1-2 hours; add mixed living things in 3-5 times , stirring for 3-6h; adding a small amount of NMP to adjust the viscosity to 6000-12000cp to obtain the positive electrode slurry to be coated. The proportioning ratio of the positive electrode slurry active material, CNT, S-P and PVDF is 94.5:1:1.5:3.

[0067] Preparation of negative electrode slurry. Dissolve PVDF in NMP to make a glue solution with a mass fraction of 10%; add CNT slurry, disperse at high speed for 1 hour, add S-P and stir at high speed for 1-2 hours; add carbon-coated lithium titanate material (carbon content 3%), stirring for 3-6h; adding a small amount of NMP to adjust the viscosi...

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 high-energy density lithium titanate power battery and a preparation method thereof. The battery adopts a high potential lithium nickel manganese oxide material doped with lithium vanadium phosphate as a positive electrode active material and adopts a carbon-encapsulated lithium titanate material as a negative electrode active material; and through optimal configuration of a conductive agent, a diaphragm, an electrolyte solution and the like, the working voltage and energy density of the battery are greatly promoted on the basis that high safety, long service life and excellent rate capacity of conventional lithium titanate batteries are guaranteed. The manufacturing process of the battery comprises the steps of active material premixing, motar production, film production, winding / stacking, packaging, liquid injection, secondary sealing, formation, checking and the like. The battery disclosed by the invention has the characteristics of high energy density, long cycle life, safety, excellent rate capacity and the like, so that the battery has wide development prospects in the field of power batteries.

Description

technical field [0001] The invention relates to the technical field of lithium ion power batteries, in particular to a lithium titanate power battery with high energy density and a preparation method thereof. Background technique [0002] Since the 21st century, with the strengthening of people's awareness of environmental protection, the depletion of fossil energy and the continuous advancement of lithium battery technology, lithium batteries are being rapidly used in electric bicycles due to their excellent characteristics such as long life, high cycle, and environmental friendliness. , hybrid vehicles and pure electric vehicles. Due to the complex and diverse conditions of use of energy storage equipment for vehicles, and the fact that it is closely related to people's life safety, how to improve the safety performance of lithium batteries has become one of the core hotspots in the field of lithium battery applications. Rapid development. [0003] The thermal stability ...

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): H01M2/16H01M4/485H01M4/505H01M4/525H01M4/58H01M4/62H01M10/0525H01M10/058H01M50/446
CPCH01M4/485H01M4/505H01M4/525H01M4/5825H01M4/625H01M10/0525H01M10/058H01M50/446H01M50/449Y02E60/10Y02P70/50
Inventor 吕敬双甘逢九周勇
Owner SHENZHEN HONGTAI BATTERY TECH