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

A kind of positive electrode material of lithium-sulfur battery based on carbon cloth and preparation method thereof

A technology for lithium-sulfur batteries and positive electrode materials, applied in battery electrodes, lithium batteries, positive electrodes, etc., can solve the problems of positive active material loss, poor conductivity, and easily damaged structure of positive electrode materials

Active Publication Date: 2021-07-20
BEIJING UNIV OF CHEM TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of poor electrical conductivity, easy damage to the structure of the positive electrode material and continuous loss of positive electrode active materials existing in the existing lithium-sulfur battery positive electrode materials, and to provide a battery with good electrical conductivity, stable positive electrode material structure, and good electrochemical performance. Lithium-sulfur battery cathode material based on carbon cloth and preparation method thereof

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
  • A kind of positive electrode material of lithium-sulfur battery based on carbon cloth and preparation method thereof
  • A kind of positive electrode material of lithium-sulfur battery based on carbon cloth and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step (1): Combine 1K, T300, 140g / m 2 The plain-weave carbon cloth was placed in the solvent of absolute ethanol and deionized water, and the impurities on the surface of the carbon cloth were ultrasonically treated, and then transferred to a vacuum oven for drying;

[0022] Step (2): Sodium molybdate, thiourea and anhydrous oxalic acid are dissolved in deionized water with a ratio of 1:4.2:0, and the solute is dispersed evenly by ultrasonic treatment for 30min; Transfer the carbon cloth to an autoclave and react at 200°C for 22 hours. After the autoclave is cooled, take out the carbon cloth and soak it in anhydrous ethanol and deionized water for several times, then transfer it to a vacuum drying oven to dry to obtain molybdenum disulfide / carbon cloth material;

[0023] Step (3): Dissolve the active substance sublimated sulfur, the binder polyacrylic acid and the conductive agent Super P in the ratio of 6:2:2 in the organic solvent dimethyl sulfoxide, stir evenly and...

Embodiment 2

[0026] Step (1): Add 3K, T700, 120g / m 2 The plain-weave carbon cloth was placed in the solvent of absolute ethanol and deionized water, and the impurities on the surface of the carbon cloth were ultrasonically treated, and then transferred to a vacuum oven for drying;

[0027] Step (2): Sodium molybdate, thiourea and anhydrous oxalic acid are dissolved in deionized water with a ratio of 1:4.5:1, and the solute is dispersed evenly by ultrasonic treatment for 30min; Transfer the carbon cloth to an autoclave and react at 200°C for 24 hours. After the autoclave is cooled, take out the carbon cloth and soak it in absolute ethanol and deionized water for several times, then transfer it to a vacuum drying oven to dry to obtain molybdenum disulfide / carbon cloth material;

[0028] Step (3): The active substance sublimated sulfur, the binder polyacrylic acid and the conductive agent Super P are dissolved in the organic solvent dimethyl sulfoxide at a ratio of 6:2:2, stirred evenly an...

Embodiment 3

[0031] Step (1): Combine 12K, T300, 140g / m 2 The twill carbon cloth carbon cloth is placed in the solvent of absolute ethanol and deionized water to ultrasonically remove the impurities on the surface of the carbon cloth, and then transfer it to a vacuum oven for drying;

[0032] Step (2): Ammonium molybdate, thiourea and anhydrous glucose are dissolved in deionized water in a ratio of 1:3:0, and the solute is dispersed evenly by ultrasonic treatment for 20 min; Transfer the carbon cloth to an autoclave and react at 180°C for 32 hours. After the autoclave is cooled, take out the carbon cloth and soak it in anhydrous ethanol and deionized water for several times, then transfer it to a vacuum drying oven to dry to obtain disulfide Molybdenum / carbon cloth material;

[0033] Step (3): Dissolve the active substance sublimated sulfur, the binder polyacrylic acid and the conductive agent single-walled CNTs in the ratio of 6:2:2 in the organic solvent dimethyl sulfoxide, stir evenly ...

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

PropertyMeasurementUnit
current efficiencyaaaaaaaaaa
current efficiencyaaaaaaaaaa
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to a lithium-sulfur battery positive electrode material based on carbon cloth and a preparation method thereof, which solves the problems of poor electrical conductivity, easily damaged positive electrode material structure and continuous loss of positive active materials in existing lithium-sulfur battery positive electrode materials Problem, it comprises carbon cloth, active material, binding agent and conductive agent, has molybdenum disulfide nano-sheet growing on carbon cloth, active material, binding agent and conductive agent are coated on described carbon cloth, the present invention provides simultaneously its preparation method. The invention can be widely used in the field of preparation of cathode materials for lithium-sulfur batteries.

Description

technical field [0001] The invention relates to an electrode material and a preparation method thereof, in particular to a lithium-sulfur battery cathode material based on carbon cloth and a preparation method thereof. Background technique [0002] Lithium-sulfur battery refers to a high-energy secondary battery system that uses lithium as the negative electrode and elemental sulfur or sulfur compounds as the positive electrode. The charging and discharging mechanism of lithium-sulfur batteries is different from the lithium-deintercalation mechanism of traditional lithium-ion batteries. The active material sulfur undergoes multi-step redox reactions, and the mutual conversion between chemical energy and electrical energy is realized through the breaking and generation of sulfur-sulfur bonds. The theoretical energy density of lithium-sulfur batteries is as high as 2600 Wh / kg, which is more than 10 times higher than that of traditional lithium-ion batteries, and the active mat...

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 Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/052
CPCH01M4/366H01M4/38H01M4/625H01M4/628H01M10/052H01M2004/021H01M2004/028Y02E60/10
Inventor 隋刚傅雪朱明杨小平
Owner BEIJING UNIV OF CHEM TECH