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

Core-shell structure negative electrode material, preparation method thereof and lithium ion battery

A lithium-ion battery, core-shell structure technology, applied in negative electrodes, battery electrodes, secondary batteries, etc., can solve the problems of product performance to be further improved, high cost, etc., and achieve low price, good stability, and simple preparation. Effect

Inactive Publication Date: 2021-08-03
KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of this solution is high, and the product performance needs to be further improved

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
  • Core-shell structure negative electrode material, preparation method thereof and lithium ion battery
  • Core-shell structure negative electrode material, preparation method thereof and lithium ion battery
  • Core-shell structure negative electrode material, preparation method thereof and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This embodiment provides a method for preparing a negative electrode material with a core-shell structure, the specific steps of which are:

[0060] (1) Prepare ZnO powder. Dissolve 0.08g of zinc acetate in 50mL of diethylene glycol solution, stir for 12h, then pour it into a polytetrafluoroethylene autoclave, and keep it warm at 120°C for 10h. After cooling to room temperature, centrifuge 3 times with alcohol and deionized water respectively at 8000 rpm. Then the obtained precipitate was vacuum-dried at 80°C for 12h;

[0061] (2) Preparation of ZIF-8. Weigh 1.4g zinc nitrate hexahydrate Zn(NO 3 ) 2 .6H 2 O was dissolved in 100 mL methanol. Weigh 3.087g of 2-methylimidazole and dissolve it in 100mL of methanol. Add the methanol solution of 2-methylimidazole to the methanol solution of zinc nitrate dropwise and keep stirring, and the time for adding the methanol solution of 2-methylimidazole is 0.9h;

[0062] (3) then slowly pour the ZnO powder (0.05g) in the ste...

Embodiment 2

[0069] This embodiment provides a method for preparing a negative electrode material with a core-shell structure, the specific steps of which are:

[0070] (1) Prepare ZnO powder. Dissolve 0.08g of zinc acetate in 50mL of diethylene glycol solution, stir for 12h, then pour it into a polytetrafluoroethylene autoclave, and keep it warm at 120°C for 10h. After cooling to room temperature, centrifuge 3 times with alcohol and deionized water respectively at 8000 rpm. Then the obtained precipitate was vacuum-dried at 80°C for 12h;

[0071] (2) Preparation of ZIF-8. Weigh 1.4g zinc nitrate hexahydrate Zn(NO 3 ) 2 .6H 2 O was dissolved in 100 mL methanol. Weigh 3.087g of 2-methylimidazole and dissolve it in 100mL of methanol. Add the methanol solution of 2-methylimidazole to the methanol solution of zinc nitrate dropwise and keep stirring, and the time for adding the methanol solution of 2-methylimidazole is 0.9h;

[0072] (3) then slowly pour the ZnO powder (0.05g) in the ste...

Embodiment 3

[0079] This embodiment provides a method for preparing a negative electrode material with a core-shell structure, the specific steps of which are:

[0080](1) Prepare ZnO powder. Dissolve 0.08g of zinc acetate in 50mL of diethylene glycol solution, stir for 12h, then pour it into a polytetrafluoroethylene autoclave, and keep it warm at 120°C for 10h. After cooling to room temperature, centrifuge 3 times with alcohol and deionized water respectively at 8000 rpm. Then the obtained precipitate was vacuum-dried at 80°C for 12h;

[0081] (2) Preparation of ZIF-8. Weigh 1.4g zinc nitrate hexahydrate Zn(NO 3 ) 2 .6H 2 O was dissolved in 100 mL methanol. Weigh 3.087g of 2-methylimidazole and dissolve it in 100mL of methanol. Add the methanol solution of 2-methylimidazole to the methanol solution of zinc nitrate dropwise and keep stirring, and the time for adding the methanol solution of 2-methylimidazole is 0.9h;

[0082] (3) then slowly pour the ZnO powder (0.05g) in the step...

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 provides a core-shell structure negative electrode material, a preparation method thereof and a lithium ion battery. The core-shell structure negative electrode material comprises a zinc oxide core and a carbon shell coating the surface of the zinc oxide core, and the core-shell structure negative electrode material is doped with a phosphorus-containing material. The method comprises the following steps: mixing a zinc source, a zinc-containing carbon source and a phosphorus source, and performing drying to obtain a composite material; and calcining the composite material in a protective atmosphere to obtain the core-shell structure negative electrode material. The core-shell structure negative electrode material provided by the invention can provide excellent performances of high capacity and long service life for the lithium ion battery, and can be used for solving the problems of volume expansion and poor conductivity of ZnO in the charging and discharging process of the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a negative electrode material with a core-shell structure, a preparation method thereof, and a lithium ion battery. Background technique [0002] Among many secondary batteries, lithium-ion batteries are recognized as the most promising energy storage power sources due to their advantages such as high energy density, long cycle life, high operating voltage, small self-discharge, no memory effect, and wide operating temperature range. At present, lithium-ion batteries have been widely used in the digital product market represented by mobile phones and notebook computers. However, there are still many deficiencies when it is applied to large-scale energy storage and electric vehicle power supply, especially in terms of power density, energy density, safety and cycle life, so it is urgent to improve and further develop the comprehensive performance. [0003] As an anode material, ...

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): H01M4/62H01M4/48H01M10/0525
CPCH01M4/483H01M4/628H01M4/625H01M4/62H01M10/0525H01M2004/027H01M2004/021Y02E60/10
Inventor 邹文齐士博吕豪杰
Owner KUNSHAN BAOTRON NEW ENERGY TECH CO LTD