Unlock instant, AI-driven research and patent intelligence for your innovation.

Lithium ion battery aqueous negative electrode material containing onion-shaped fullerene and preparation method thereof

An onion-like fullerene, lithium-ion battery technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve lithium dendrite battery short-circuits, poor lithium intercalation-delithiation capabilities, and lithium ion battery safety accidents And other issues

Inactive Publication Date: 2020-09-15
华富(江苏)锂电新技术有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially under the conditions of high-rate charge and discharge above 2C and high temperature of 65°C and below 0°C, the structure of the negative electrode carbon material is more prone to irreversible collapse, making its ability to intercalate and delithiate lithium worse, and cannot enter the negative electrode. Lithium ions in carbon materials will produce lithium precipitation on the negative electrode. In severe cases, lithium dendrites and internal short circuits will occur in the battery, which will eventually lead to the end of the battery life and possible safety accidents of lithium-ion batteries.

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 battery aqueous negative electrode material containing onion-shaped fullerene and preparation method thereof
  • Lithium ion battery aqueous negative electrode material containing onion-shaped fullerene and preparation method thereof
  • Lithium ion battery aqueous negative electrode material containing onion-shaped fullerene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, according to the carbon material for lithium-ion batteries 35%, C 20 1.2% of onion-like fullerene, 0.8% of conductive agent, 0.8% of binder, 0.1% of dispersant, 0.5% of thickener, 61.6% of deionized water were weighed for each component in the shell of the core.

[0023] Secondly, after mixing the lithium cobalt oxide material, onion-like fullerene and conductive agent and other powder materials evenly, and then mixing with other materials, a water-based negative electrode material containing onion-like fullerene for lithium-ion batteries is obtained .

Embodiment 2

[0025] First, according to the carbon material for lithium-ion batteries 40%, C 60 1.8% of onion-like fullerene, 1.5% of conductive agent, 1.5% of binder, 0.3% of dispersant, 0.8% of thickener, 54.1% of deionized water are weighed for the weight percentage of the three layers of onion-like fullerene for the core.

[0026] Secondly, the carbon material, onion-like fullerene, conductive agent and other powdery materials are evenly mixed, and then mixed with other materials to obtain a water-based negative electrode material containing onion-like fullerene for lithium-ion batteries.

Embodiment 3

[0028] First, according to the carbon material for lithium-ion batteries 38%, C 24 21 layers of onion-like fullerene for the core shell 0.5%, C 50 15 layers of onion-like fullerene 0.5% for the core shell, C 72 0.8% of onion-like fullerene, 1% of conductive agent, 1.2% of binder, 0.2% of dispersant, 0.6% of thickener, 57.2% of deionized water, the weight percentage of the outer shell of the core Weigh each component .

[0029] Secondly, the carbon material, onion-like fullerene, conductive agent and other powdery materials are evenly mixed, and then mixed with other materials to obtain a water-based negative electrode material containing onion-like fullerene for lithium-ion batteries.

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 battery aqueous negative electrode material containing onion-shaped fullerene and a preparation method thereof. The lithium ion battery aqueous negative electrode material comprises the following components in percentage by mass: 35%-40% of a carbon material, 1.2%-1.8% of onion-shaped fullerene, 0.8%-1.5% of a conductive agent, 0.8%-1.5% of an adhesive, 0.1%-0.3% of a dispersing agent, 0.5%-0.8% of a thickening agent and 54.1%-61.6% of deionized water. The method comprises the steps of powdery material premixing, liquid material premixing, material mixing, vacuum stirring, vacuumizing and filtering. On the one hand, a lithium intercalation-deintercalation channel of the carbon material can be increased, the lithium intercalation-deintercalation capacity of the carbon material is improved, and the occurrence of a lithium precipitation phenomenon is reduced, so that the safety of the lithium ion battery is effectively improved; and on the other hand, due to the multi-layer core-shell structure of the onion-shaped fullerene, the structural stress change of the carbon material in the cycle process of the lithium ion battery can be relieved, so that the stability of the lithium ion battery can be improved, the cycle life of the lithium ion battery is prolonged, and the high-rate charge-discharge performance of the lithium ion battery is improved.

Description

technical field [0001] The invention relates to a lithium-ion battery aqueous negative electrode material containing onion-like fullerene and a preparation method thereof, belonging to the technical field of chemical power supply materials. Background technique [0002] With the continuous progress and development of lithium-ion battery technology, it has been used in many fields such as digital electronic products, energy storage, power, and new energy vehicles. Lithium-ion batteries have the advantages of light weight, high energy density, and high-rate charge-discharge performance, but the market still hopes that the safety and cycle life of lithium-ion batteries can be further improved. One of the important factors that determine the safety and cycle life of lithium-ion batteries is their lithium intercalation-delithiation stability. The negative electrode materials of lithium-ion batteries are mainly divided into two processes: water-based and oil-based. Water-based ne...

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): H01M4/583H01M4/62H01M10/0525
CPCH01M4/583H01M4/62H01M4/621H01M4/624H01M10/0525H01M2004/027Y02E60/10
Inventor 吴战宇王大林姜庆海施晓渝成辰蒋仕平沙树勇朱明海董志成孟云尤兆坤
Owner 华富(江苏)锂电新技术有限公司