Method for preparing lithium battery anode

A lithium battery and positive electrode technology, applied in the field of preparation of lithium battery positive electrodes, can solve the problems of reduced electrode specific capacity, complex process, high cost, etc., and achieve the effect of increased specific capacity, simple manufacturing process, and low cost

Inactive Publication Date: 2009-03-04
WUHAN INSTITUTE OF TECHNOLOGY
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the preparation of the positive electrode material and the preparation of the electrode are divided into two steps. The common disadvantage is that the coated electrode needs to be dried for a long time to prepa

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

Example Embodiment

[0021] Example 1:

[0022] The aluminum foil with a flat surface is cut into a disc with a diameter of 12 mm, first ultrasonically washed with acetone for 3 minutes, then ultrasonically washed with distilled water for 1 minute, taken out and dried.

[0023] Put the processed aluminum foil into the vacuum chamber of the RF chemical vapor deposition device, use Ar to carry the thiophene into the reaction vacuum chamber, adjust the gas flow to maintain the pressure in the chamber at 2.5 Pa, and adjust the RF power source to 100W. The total flow of Ar and thiophene is 100 sccm (standard condition ml / min), and the volume content of thiophene is 70%. After 5 hours of deposition, a sulfur-carbon composite material is obtained. After it is naturally cooled to room temperature in a vacuum chamber, a lithium battery cathode is obtained .

Example Embodiment

[0024] Example 2:

[0025] The copper foil with a flat surface is cut into a disc with a diameter of 15 mm, first ultrasonically washed with acetone for 3 minutes, then ultrasonically washed with distilled water for 1 minute, and then taken out and dried.

[0026] Put the processed copper foil into the vacuum chamber of the radio frequency chemical vapor deposition device, and use N 2 CS 2 Carry to the reaction chamber, adjust the gas flow rate to maintain the pressure in the chamber at 6Pa, adjust the RF power source to 70W, N 2 And CS 2 The total flow is 150sccm, where CS 2 Its volume content is 60%. After 6 hours of deposition, a sulfur-carbon composite material is obtained. After it is naturally cooled to room temperature in a vacuum chamber, a lithium battery positive electrode is obtained.

Example Embodiment

[0027] Example 3:

[0028] The nickel foil with a flat surface is cut into a disc with a diameter of 14 mm, first ultrasonically washed with acetone for 3 minutes, then ultrasonically washed with distilled water for 1 minute, and then taken out and dried.

[0029] Put the processed nickel foil into the vacuum chamber of the hot-wire chemical vapor deposition device, adjust the wire base distance to 14mm, and use Ar to remove the CS 2 Carry to the reaction chamber, adjust the heating wire power to keep the heating wire temperature at 1600℃, adjust the needle valve to keep the growth pressure at 200Pa, Ar and CS 2 The total flow is 200sccm, where CS 2Its volume content is 65%. The sulfur-carbon composite material is obtained after 4 hours of deposition, and the anode of the lithium battery is obtained after it is naturally cooled to room temperature in a vacuum chamber.

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
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention belongs to the battery technology field, and more particularly relates to a preparation method of the anode of a lithium battery; the preparation method comprises the following steps: sheet metals with smooth surfaces are cut into round pieces which are washed with acetone by ultrasonic, then washed with distilled water by ultrasonic and dried after being taken out; the processed sheet metals are placed into a vacuum cavity of a chemical vapor deposition device, use carrier gas to carry liquid carbon sources containing sulfur to the vacuum cavity in reaction so as to lead the carbon sources containing sulfur to carry out pyrolysis, an active group obtained after pyrolysis is deposited on the processed sheet metals and a sulfocarbon composite material can be obtained; the prepared sulfocarbon composite material is cooled naturally to room temperature in the chemical vapor deposition device and then the anode of the lithium battery can be obtained. The invention has the following advantages that the preparation method integrates the preparation of the anode materials and the preparation of the electrode into a whole, completes the preparation of the electrode by one step operation without drying and adding adhesives, provides possibilities for the improvement of the specific capacity of the anode materials and has the advantages of simple technique, time saving and low cost and the like.

Description

Technical field [0001] The invention belongs to the technical field of batteries, and particularly relates to a method for preparing a lithium battery anode. Background technique [0002] In recent years, with the continuous advent of a series of high-tech electronic products such as digital cameras, notebook computers, and hybrid cars, batteries have played an increasingly important role. At the same time, people's requirements for battery performance are getting higher and higher. The theoretical specific capacity of elemental sulfur is 1675mAh / g, and the theoretical specific energy of a battery assembled with lithium can reach 2600Wh / kg, which is much higher than that of lithium-ion batteries and has become the main trend of current battery development. [0003] However, due to the electrical insulation of sulfur, it is impossible to charge and discharge an electrode containing 100% sulfur at room temperature. To make up for this shortcoming, a common solution is to add a larg...

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): H01M4/04
CPCY02E60/10
Inventor 王传新皮华滨汪建华王升高马志斌满卫东张行
Owner WUHAN INSTITUTE OF TECHNOLOGY
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