Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation and application of conductive carbon film-coated calcium nitride compound serving as anode material of lithium battery

A technology of negative electrode material and conductive carbon film is applied in the field of preparation and application of negative electrode material of lithium battery coated with nitrogen-calcium compound by conductive carbon film. Achieving the effects of good electrical conductivity, improved electrochemical kinetic performance, and reduced cost

Inactive Publication Date: 2011-06-01
ZHEJIANG UNIV
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as SnO 2 , WO 2 , MoO 2 , VO 2 ,TiO 2 , Li x Fe 2 o 3 , Li 4 Ti 5 o 12 , Li 4 mn 5 o 12 etc., but generally the conductivity is not as good as that of graphite electrodes, and the high-rate discharge performance of lithium-ion batteries with metal oxides as negative electrodes is poor

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
  • Preparation and application of conductive carbon film-coated calcium nitride compound serving as anode material of lithium battery
  • Preparation and application of conductive carbon film-coated calcium nitride compound serving as anode material of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Carbon coated Ca 3 N 2 preparation

[0030] Take metal calcium particles with a purity of 99.99% and heat to 850 o After C is melted, it is sprayed with high-purity nitrogen (purity 99.999%) and sprayed into polyethylene glycol liquid. The calcium mist reacts with nitrogen gas in a nitrogen atmosphere to form calcium nitride (Ca 3 N 2 ) microspheres, which form spherical powder after cooling in a polyethylene glycol liquid with a molecular weight of 200 and a purity of 99%. At the same time, the polyethylene glycol in contact with calcium nitride is carbonized, and the gas generated during the carbonization process makes the carbon The membrane swells, forming a carbon-coated calcium nitride material primary.

[0031] Filter out carbon-coated Ca 3 N 2 The primary product is refined by calcining again in an atmosphere of high-purity nitrogen with a purity of 99.999% for 2 hours, and the temperature is controlled at 700 o Below C, the residual calcium in...

Embodiment 2

[0032] Example 2: Carbon coated Ca 3 N 2 Lithium battery with negative electrode (1)

[0033] Take calcium metal with a purity of 99.99%, at 850 o After C is melted, it is sprayed with high-purity nitrogen (purity 99.999%) and sprayed into polyethylene glycol liquid. The calcium mist reacts with nitrogen gas in a nitrogen atmosphere to form calcium nitride (Ca 3 N 2 ) Microspheres form spherical powder after cooling in polyethylene glycol liquid with a molecular weight of 600 and a purity of 99%. At the same time, the polyethylene glycol in contact with calcium nitride is carbonized, and the gas generated during the carbonization process makes the carbon The membrane swells, forming a carbon-coated calcium nitride material primary.

[0034] Filter out carbon-coated Ca 3 N 2 The primary product is refined by calcining again in an atmosphere of high-purity nitrogen with a purity of 99.999% for 3 hours, and the temperature is controlled at 650 o Below C, the residual calci...

Embodiment 3

[0038] Example 3: Carbon-coated Ca 3 N 2 Lithium battery with negative electrode (2)

[0039] Take calcium metal with a purity of 99.99%, at 850 o After C is melted, it is sprayed with high-purity nitrogen (purity 99.999%) and sprayed into polyethylene glycol liquid. The calcium mist reacts with nitrogen gas in a nitrogen atmosphere to form calcium nitride (Ca 3 N 2 ) Microspheres form spherical powder after cooling in polyethylene glycol liquid with a molecular weight of 800 and a purity of 99%. At the same time, the polyethylene glycol in contact with calcium nitride is carbonized, and the gas generated during the carbonization process makes the carbon The membrane swells, forming a carbon-coated calcium nitride material primary.

[0040] Filter out carbon-coated Ca 3 N 2 The primary product is refined by calcining again in an atmosphere of high-purity nitrogen with a purity of 99.999% for 3 hours, and the temperature is controlled at 650 o Below C, the residual calci...

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 preparation and application of an anode material of a lithium battery and aims to provide preparation and the application of a conductive carbon film-coated calcium nitride compound serving as the anode material of the lithium battery. The preparation method comprises the following steps of: after calcium metal is molten, spraying into polyethylene glycol liquid by using high purity nitrogen, and performing a reaction of the calcium fog drops and nitrogen in an nitriding atmosphere to obtain Ca3N2 microspheres so as to obtain a carbon-coated calcium nitride material primary product; and after filtering out a carbon-coated calcium nitride material, calcining for 2 to 3 hours again in the high purity nitrogen atmosphere and carrying out refining to obtain carbon-coated Ca3N2, or calcining for 2 to 3 hours again in vacuum to obtain a carbon-coated Ca3N2-Ca2N mixture. In the invention, a conductive carbon film is formed on the surface of Ca3N2 or Ca3N2-Ca2N, is favorable for stability of an electrode structure, has high heat stability and low cost, is easy to prepare and has no pollution. The conductive carbon film prepared by a spraying method has the advantages of uniform thickness and high conductivity. The electrode polarization is reduced. The speed and the capacity of the lithium battery are improved.

Description

technical field [0001] The invention relates to the preparation and application of a negative electrode material for a lithium ion battery, in particular to a method for preparing a negative electrode material for a lithium battery with a conductive carbon film coated with a nitrogen-calcium compound, and a lithium ion battery prepared using the negative electrode material. Background technique [0002] Lithium-ion batteries have the advantages of light weight, large capacity, and no memory effect, so they have been widely used. Many digital devices now use lithium-ion batteries as power sources. The energy density of lithium-ion batteries is very high, its capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight, and its advantages such as low self-discharge rate and no toxic substances are important reasons for its wide application. In 1990, Nagoura and others in Japan developed a negative electrode with petroleum coke and LiCoO 2 Lithium-ion...

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): H01M4/1397H01M10/0525
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 李洲鹏刘宾虹
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com