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

Method for preparing lithium ion battery alloy composite anode material with nuclear shell structure

A lithium-ion battery and negative electrode material technology, applied in the field of material science, can solve the problems of difficult recycling of surfactants, pollution and waste, and low yield, and achieve excellent electrochemical performance, simple process, and low technical cost.

Inactive Publication Date: 2009-12-30
TSINGHUA UNIV +1
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield of this method is low, it is difficult to realize large-scale production, and the surfactant is difficult to recover after the reaction is completed, which is easy to cause pollution and waste

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
  • Method for preparing lithium ion battery alloy composite anode material with nuclear shell structure
  • Method for preparing lithium ion battery alloy composite anode material with nuclear shell structure
  • Method for preparing lithium ion battery alloy composite anode material with nuclear shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh CuO and SnO according to the molar ratio of Cu:Sn of 6:5 2 Nano oxide, then resin by weight ratio: (CuO+SnO 2 )=5:3 ratio Weigh 60wt% water-soluble phenolic resin solution, add deionized water to form a 15wt% solution. The obtained solution is dried with an airflow spray dryer, and the feed solution is injected with a peristaltic pump at a speed of 15ml / min; the gas flow rate of the nozzle is controlled by the pressure of compressed air, and atomization is generated at about 0.4MPa; the air inlet temperature is controlled The temperature at the outlet is 300°C, and the outlet temperature is 130°C; the outlet air is separated by a primary vortex and vented. The core-shell structure phenolic resin, tin dioxide and copper oxide spherical powder obtained by spray drying were calcined for 5 hours under the protection of high-purity nitrogen at 1000°C to obtain spherical core-shell structure Cu 6 sn 5 / C composite anode material, figure 1 is Cu 6 sn 5 SEM pattern ...

Embodiment 2

[0022] Weigh Co according to the molar ratio of Co:Sn of 1:2 3 o 4 and SnO 2 Nano oxide, then resin by weight: (Co 3 o 4 +SnO 2 )=5:3 ratio Weigh 60wt% water-soluble phenolic resin solution, add deionized water to form a 15wt% solution. The resulting solution is dried with an air-flow spray dryer, and the feed solution is sample-introduced with a peristaltic pump at a speed of 15ml / min. The gas flow rate of the nozzle is controlled by the pressure of compressed air, and atomization is produced at about 0.4MPa; the temperature of the air inlet is controlled to be 300°C, the outlet temperature is 120°C; the outlet air is vented through the first-stage vortex separation. The core-shell structure phenolic resin, tin dioxide and cobalt tetroxide spherical powder obtained by spray drying were calcined for 10 hours under the protection of high-purity nitrogen at 900°C to obtain the spherical core-shell structure CoSn 2 / C composite anode material. Using a lithium sheet as a co...

Embodiment 3

[0024] Weigh Sb according to the molar ratio of Sb:Sn is 1:1 2 o 3 and SnO 2 Nano oxide, then by weight ratio resin: (Sb 2 o 3 +SnO 2 )=5:1 ratio Weigh the alcohol-soluble phenolic resin powder, add ethanol and make a 20wt% solution. The obtained solution is dried with an airflow spray dryer, and the feed solution is injected with a peristaltic pump at a speed of 10ml / min; the nozzle gas flow rate is controlled by the pressure of compressed air, and atomization is generated at about 0.4MPa; the air inlet temperature is controlled The temperature at the outlet is 300°C, and the outlet temperature is 100°C; the air at the outlet is separated by a primary vortex and vented. The core-shell structure phenolic resin, tin dioxide and antimony trioxide spherical powder obtained by spray drying was calcined for 10 hours under the protection of high-purity nitrogen at 800°C to obtain a spherical core-shell structure SnSb / C composite negative electrode material . Using a lithium s...

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 relates to a method for preparing a lithium ion battery alloy composite anode material with a nuclear shell structure by a spray drying-carbon thermal reduction method, and belongs to the technical field of material science. The method comprises the following steps: firstly, weighing nano oxides and organic macromoleclar polymer required to prepare the alloy composite material in stoichiometric ratio, and adding solvent to prepare solution with certain concentration; performing spray drying on the solution; and sintering obtained powder at certain temperature to obtain the lithium ion battery alloy composite anode material with the spherical nuclear shell structure. The product prepared by the method has excellent electrochemical performance; and the preparation method has low cost and simple process, and can be directly used for industrial mass production of the lithium ion battery alloy composite anode material.

Description

technical field [0001] The invention relates to a method for preparing a core-shell structure lithium ion battery alloy composite negative electrode material by a spray drying-carbothermal reduction method, and belongs to the field of material science and technology. Background technique [0002] With the rapid development of the electronics and information industries, a large number of portable electronic products such as mobile communication equipment, notebook computers, and digital products have been widely used, making society put forward higher requirements for the performance of batteries, especially rechargeable secondary batteries: Higher capacity, smaller size, lighter weight and longer service life. Lithium-ion batteries have become a research hotspot due to their high energy density, high operating voltage, good load characteristics, fast charging speed, safety and pollution-free, and no memory effect. [0003] Lithium-ion battery alloy anode materials mainly in...

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): H01M4/04H01M4/38H01M4/62
CPCY02E60/12H01M4/0419H01M4/1393H01M4/133Y02E60/10
Inventor 任建国闫润宝何向明王莉蒲薇华李建军姜长印万春荣
Owner TSINGHUA UNIV