Graphene-based lithium ion battery negative electrode material and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of increasing ion conduction paths, increasing battery costs, easy accumulation or agglomeration, etc., to improve the first Coulombic efficiency , good cycle performance and high coulombic efficiency

Pending Publication Date: 2020-11-20
南京彼洲生物科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems to be solved for graphene to move from the laboratory to commercial application, especially the low coulombic efficiency of graphene for the first time, which will greatly increase the amount of positive electrode materials, thereby increasing the cost of the entire battery
Moreover, due to the van der Waals force, graphene is prone to stacking or agglomeration, which increases the ion conduction path and affects the cycle performance of graphene as a negative electrode material.
[0006] Patent CN106784747B dis

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
  • Graphene-based lithium ion battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of a graphene-based lithium ion battery negative electrode material, comprising the steps of:

[0035] (1) First modify niobium and tin-doped graphene with 7-octenyltrichlorosilane to obtain silanized graphene;

[0036] (2) react silanized graphene with 4-bromo-2-(2-nitro-1-propenyl)thiophene to obtain modified graphene;

[0037] (3) Finally, the modified graphene and 2-vinyl thiophene are used as raw materials for polymerization to obtain a graphene-based negative electrode material for lithium-ion batteries;

[0038]Wherein, the niobium and tin-doped graphene is made from niobium pentachloride, tin tetrachloride and liquid polyacrylonitrile in a mass ratio of 0.01:0.05:1.

[0039] The preparation method of niobium and tin-doped graphene is as follows: first add niobium pentachloride and tin tetrachloride to hydrochloric acid solution with a mass concentration of 36%, and ultrasonically oscillate evenly, then add a 40% aqueous ethanol solution wit...

Embodiment 2

[0051] A preparation method of a graphene-based lithium ion battery negative electrode material, comprising the steps of:

[0052] (1) First modify niobium and tin-doped graphene with 7-octenyltrichlorosilane to obtain silanized graphene;

[0053] (2) react silanized graphene with 4-bromo-2-(2-nitro-1-propenyl)thiophene to obtain modified graphene;

[0054] (3) Finally, the modified graphene and 2-vinyl thiophene are used as raw materials for polymerization to obtain a graphene-based negative electrode material for lithium-ion batteries;

[0055] Wherein, the niobium and tin-doped graphene is made from niobium pentachloride, tin tetrachloride and liquid polyacrylonitrile in a mass ratio of 0.02:0.03:1.

[0056] The preparation method of niobium and tin-doped graphene is as follows: first add niobium pentachloride and tin tetrachloride to hydrochloric acid solution with a mass concentration of 38%, and ultrasonically oscillate evenly, then add a 30% ethanol aqueous solution wi...

Embodiment 3

[0068] A preparation method of a graphene-based lithium ion battery negative electrode material, comprising the steps of:

[0069] (1) First modify niobium and tin-doped graphene with 7-octenyltrichlorosilane to obtain silanized graphene;

[0070] (2) react silanized graphene with 4-bromo-2-(2-nitro-1-propenyl)thiophene to obtain modified graphene;

[0071] (3) Finally, the modified graphene and 2-vinyl thiophene are used as raw materials for polymerization to obtain a graphene-based negative electrode material for lithium-ion batteries;

[0072] Wherein, the niobium and tin-doped graphene is made from niobium pentachloride, tin tetrachloride and liquid polyacrylonitrile in a mass ratio of 0.015:0.04:1.

[0073] The preparation method of niobium and tin-doped graphene is as follows: first add niobium pentachloride and tin tetrachloride to hydrochloric acid solution with a mass concentration of 37%, and ultrasonically oscillate evenly, then add a 35% ethanol aqueous solution w...

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 discloses a graphene-based lithium ion battery negative electrode material and a preparation method thereof. The method comprises the steps that niobium and tin doped graphene is modified with 7-octenyl trichlorosilane to obtain silanized graphene, then the silanized graphene is reacted with 4-bromo-2-(2-nitro-1-propenyl) thiophene, and modified graphene is obtained; finally, the modified graphene and 2-vinylthiophene are used as raw materials, a polymerization reaction is performed to obtain the graphene-based lithium ion battery negative electrode material, and the graphene-based lithium ion battery negative electrode material is high in initial coulombic efficiency, high in specific capacity and excellent in cycle performance.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a graphene-based lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] With economic development and social progress, traditional energy sources such as coal, oil, and natural gas cannot meet the needs of human social development on the one hand, and have brought serious environmental pollution on the other. Therefore, the development and utilization of new energy has become the most Urgent needs. [0003] Due to the advantages of high energy density, long cycle life, high working voltage, and no memory effect, lithium-ion batteries have been widely used in portable electronic devices, electric vehicles, aerospace and other fields. Lithium-ion batteries are secondary rechargeable batteries, which mainly rely on lithium ions to move between the positive and negative electrodes. During charging and discharging...

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): C08F292/00C08F228/06C01B32/194H01M4/36H01M4/587H01M4/62H01M10/0525
CPCC08F292/00C01B32/194H01M4/366H01M4/587H01M4/624H01M10/0525H01M2004/021H01M2004/027C08F228/06Y02E60/10
Inventor 王和森
Owner 南京彼洲生物科技有限公司
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