Lithium-ion secondary battery negative electrode material and preparation method thereof

A secondary battery and anode material technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of high cost, non-compliance, reduction of carbon emissions and environmental protection requirements of resource recycling and reuse, and achieve low cost and Effects of environmental protection and high capacity retention

Active Publication Date: 2011-11-30
上高县荣炭科技有限公司
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the defects of existing polymorphic carbon materials as negative electrode materials of lithium-ion secondary batteries, the cost of graphitized carbon materials is high, the preparation method is cumbersome, and it does not meet the environmental protection requirements of reducing carbon emissions and resource recycling. The invention provides a lithium-ion secondary battery negative electrode material and its preparation method

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
  • Lithium-ion secondary battery negative electrode material and preparation method thereof
  • Lithium-ion secondary battery negative electrode material and preparation method thereof
  • Lithium-ion secondary battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The "lithium-ion secondary battery negative electrode material and preparation method thereof" provided by the present invention is to use the unburned carbon of a fuel oil (or coal-fired) fly ash as the carbon material, and the preparation method of the unburned carbon carbon material comprises the following steps: First, impregnate the fuel (or coal) fly ash, stir at room temperature at 200rpm for 2 hours, filter and separate the solid and liquid, then wash with distilled water several times to remove the residual impregnating agent, and dry at 105°C for 24 hours , that is, to obtain the unburned carbon material, so as to solve the existing multi-type carbon materials (such as: natural graphite, coal, carbon fiber and metastable spherical carbon (MCMB), and even non-graphitized carbon materials derived from resins. ) have problems such as low capacitance, environmental pollution and high price.

[0029] figure 1 For the preparation method of unburned carbon powder of...

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 lithium ion secondary battery anode material and a preparation method. The lithium ion secondary battery anode material adopts the unburned carbon of fuel fly ash as a carbon material. The invention also provides the preparation method for the lithium ion secondary battery anode material. The preparation method comprises the following steps of: grinding the unburned carbon in a ball mill, and performing heat treatment, wherein a temperature range required by the heat treatment is 2,000 to 3,200 DEG C; and preserving heat for a certain time, cooling the unburned carbon to room temperature, performing acid treatment by adopting acidic aqueous solution, and thus obtaining power which is unburned carbon graphite powder as the lithium ion secondary battery anode material. After kinds of analysis are performed on the unburned carbon graphite powder, the graphitizing grade and crystallinity of the unburned carbon graphite powder are increased, and the unburned carbon graphite powder with such a structure and such components has relatively higher capacity retentions, simultaneously meets the requirements of relatively lower cost and environmental friendliness and is proved to be sufficient to serve as the lithium ion secondary battery anode material.

Description

technical field [0001] The present invention relates to a negative electrode material of a lithium ion secondary battery and a preparation method thereof, in particular to a negative electrode material of a lithium ion secondary battery using unburned carbon of fuel (or coal) fly ash as a carbon material, and a related preparation method . Background technique [0002] The so-called lithium-ion secondary battery refers to a lithium-ion battery that can be charged and discharged. It is widely used in portable 3C electronic products, and with the increasing improvement of portable 3C electronic products, the existing lithium-ion The energy density of secondary batteries cannot meet people's needs gradually, so the main technologies of lithium-ion secondary battery materials will need to be redeveloped and improved, including lighter volume, weight, and higher battery energy density, etc. However, It will also be a very important issue to develop lower-cost and environmentally...

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): H01M4/133H01M4/1393
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 吴玉祥周宪聪陈伯坤
Owner 上高县荣炭科技有限公司
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