Hard carbon negative electrode material

A negative electrode material, hard carbon technology, applied in the direction of negative electrode, nanotechnology for materials and surface science, battery electrodes, etc., can solve the problems of degradation, safety and life and other important performance without much improvement

Inactive Publication Date: 2021-05-11
DONGGUAN KAIJIN NEW ENERGY TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the energy density of lithium-ion batteries using ternary NCM as the positive electrode has reached 250Wh / kg, which is very close to the limit of this material, but the important performances such as safety and life have not improved much, or even declined.

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
  • Hard carbon negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the hard carbon negative electrode material comprises the following steps:

[0029] Pretreatment: weighing the raw material according to the negative electrode material described in claim 1, dissolving the carbon source in water, putting it into the first container, and putting vanadium pentoxide into the second container;

[0030] Mixing heat with oil and water: Add deionized water to the first container and the second container respectively, then add vegetable oil dropwise, put the first container and the second container in a closed device, heat and keep warm, and then put the solution in the first container Pour into the second container, add boron powder, continue to heat up and keep warm, cool naturally after the reaction is complete, filter and dry to obtain a semi-finished negative electrode material;

[0031] Post-processing: The chemical vapor deposition method is used to deposit fillers on the surface of the semi-finished negative el...

Embodiment 1

[0039] Weigh raw materials according to the above-mentioned hard carbon negative electrode material, including the following components in parts by weight: 60 parts of vanadium pentoxide, 8 parts of carbon source, 5 parts of boron powder, 1 part of filler, wherein the carbon source is glucose, and the filler is For tin nitride, the carbon source is dissolved in water, packed into the first container, and vanadium pentoxide is packed into the second container;

[0040] Mixing oil and water: Add 1 part of deionized water to the first container and the second container respectively, then add 1 part of the mixed oil of peanut oil, linseed oil and castor oil dropwise, and put the first container and the second container in a closed device , heated to 130°C and kept warm for 65s, then poured the solution in the first container into the second container, added boron powder, continued to heat up to 260°C and kept warm for 1.5h, cooled naturally after the reaction was complete, and filt...

Embodiment 2

[0044]Weigh the raw material according to the above hard carbon negative electrode material, including the following components in parts by weight: 68 parts of vanadium pentoxide, 10 parts of carbon source, 6 parts of boron powder, 3 parts of filler, wherein the carbon source is sucrose, and the filler is For silicon nitride, the carbon source is dissolved in water, packed into the first container, and vanadium pentoxide is packed into the second container;

[0045] Mixing oil and water: Add 1 part of deionized water to the first container and the second container respectively, then add 1 part of the mixed oil of peanut oil, linseed oil and castor oil dropwise, and put the first container and the second container in a closed device , heated to 140°C and kept warm for 70s, then poured the solution in the first container into the second container, added boron powder, continued to heat up to 270°C and kept warm for 1.6h, cooled naturally after the reaction was complete, and filter...

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 the field of battery negative electrode materials, in particular to a hard carbon negative electrode material which comprises the following components in parts by weight: 60-75 parts of vanadium pentoxide, 8-12 parts of a carbon source, 5-7 parts of boron powder, 1-8 parts of a filler, 1-6 parts of vegetable oil and 1-5 parts of deionized water. Firstly, reducing sugar reacts with vanadium pentoxide to form VO, so that not only is the material cheap, but also the battery performance can be greatly improved; secondly, the battery negative electrode material with nanometer strip-shaped VO and crystal water is synthesized by adopting an oil-water mixed heating method, and the negative electrode material has a typical layered crystal structure and a relatively large interlayer spacing, so that free movement of lithium ions between layers is facilitated; thirdly, the negative electrode material has a soft one-dimensional nanometer morphology, so that the diffusion distance of lithium ions can be shortened, and the volume change caused by lithium ion deintercalation can be relieved; and fourthly, the surface of the nanobelt is uniformly coated with carbon, so that the conductivity of the negative electrode material can be effectively improved.

Description

technical field [0001] The invention relates to the field of negative electrode materials for batteries, in particular to a hard carbon negative electrode material. Background technique [0002] In view of the domestic environmental problems, especially the increasingly serious air quality problem, the air pollution caused by automobile exhaust can no longer be ignored. In the period of vigorous development in the coming years, the demand for high-performance battery anode materials is also increasing. In response to this demand, it is particularly important to realize the large-scale preparation of high-quality lithium-ion battery anode materials. At present, the negative electrode material of lithium-ion batteries is mainly graphite, but it cannot be charged and discharged at a high rate, while hard carbon has high energy density and irreplaceable low-temperature rate performance, and is a potential development direction. [0003] Hard carbon refers to difficult-to-graph...

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): H01M4/48H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/483H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 葛传长仰永军
Owner DONGGUAN KAIJIN NEW ENERGY TECH
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