Lithium-sulfur battery anode material and application thereof

A positive electrode material, lithium-sulfur battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of complex process and expensive equipment, and achieve the effect of improving conductivity, suppressing volume expansion effect, and excellent electrochemical performance

Active Publication Date: 2018-09-18
SYNERGY INNOVATION INST OF GDUT HEYUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on metal selenide / sulfur composite positive electrode materials. CN200710040492.7 reported a kind of antimony triselenide (Sb 2 Se 3 ) anode thin film material and preparation method thereof, described Sb 2 Se 3 Prepared by reactive pulsed laser deposition, but this method is expensive and complicated

Method used

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  • Lithium-sulfur battery anode material and application thereof
  • Lithium-sulfur battery anode material and application thereof
  • Lithium-sulfur battery anode material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The first step is to prepare antimony selenide (Sb 2 Se 3 )Nano stave:

[0027] Dissolving antimony trichloride in triethylene glycol, stirring for 30 minutes, to obtain a cationic solution; then dissolving selenium powder in the first mixed solution, stirring for 30 minutes, to obtain a selenium precursor solution; Pour it into the second mixed solution, divide it under nitrogen, and stir at 200°C for 30 minutes; then continue to stir the cationic solution for 20 minutes, then cool it to room temperature, and centrifuge it with a high-speed centrifuge for 10 minutes to finally obtain pure Sb 2 Se 3 Antimony Selenide Nanorods. Wherein, every 5mL triethylene glycol adds 1mmol antimony trichloride; The composition of the first mixed solution is monoethanolamine and N 2 h 4 ·H 2 O, the volume ratio of the two is 4:1, and 1.5mmol selenium powder is added in the first mixed solution of every 1.5mL; The composition of the second mixed solution is the triethylene glycol...

Embodiment 2

[0036] The first step is to prepare antimony selenide (Sb 2 Se 3 )Nano stave:

[0037] Dissolving antimony trichloride in triethylene glycol, stirring for 30 minutes, to obtain a cationic solution; then dissolving selenium powder in the first mixed solution, stirring for 30 minutes, to obtain a selenium precursor solution; Pour it into the second mixed solution, divide it under nitrogen, and stir at 200°C for 30 minutes; then continue to stir the cationic solution for 20 minutes, then cool it to room temperature, and centrifuge it with a high-speed centrifuge for 10 minutes to finally obtain pure Sb 2 Se 3 Antimony Selenide Nanorods. Wherein, every 5mL triethylene glycol adds 1mmol antimony trichloride; The composition of the first mixed solution is monoethanolamine and N 2 h 4 ·H 2 O, the volume ratio of the two is 4:1, and 1.5mmol selenium powder is added in the first mixed solution of every 1.5mL; The composition of the second mixed solution is the triethylene glycol...

Embodiment 3

[0044] The first step is to prepare antimony selenide (Sb 2 Se 3 )Nano stave:

[0045] Dissolving antimony trichloride in triethylene glycol, stirring for 30 minutes, to obtain a cationic solution; then dissolving selenium powder in the first mixed solution, stirring for 30 minutes, to obtain a selenium precursor solution; Pour it into the second mixed solution, divide it under nitrogen, and stir at 200°C for 30 minutes; then continue to stir the cationic solution for 20 minutes, then cool it to room temperature, and centrifuge it with a high-speed centrifuge for 10 minutes to finally obtain pure Sb 2 Se 3 Antimony Selenide Nanorods. Wherein, every 5mL triethylene glycol adds 1mmol antimony trichloride; The composition of the first mixed solution is monoethanolamine and N 2 h 4 ·H 2 O, the volume ratio of the two is 4:1, and 1.5mmol selenium powder is added in the first mixed solution of every 1.5mL; The composition of the second mixed solution is the triethylene glycol...

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Abstract

The invention relates to a lithium-sulfur battery anode material and an application thereof. The material is prepared by the following method, which comprises the following steps: first step, dissolving antimony trichloride in triethylene glycol, and stirring to obtain a cationic solution; dissolving selenium powder in a first mixed solution, and stirring to obtain a selenium precursor solution; pouring the selenium precursor solution into a second mixed solution, stirring under a nitrogen atmosphere at 180-250 DEG C, then adding the cationic solution, continuing to stir the solution, coolingthe same to the room temperature to obtain a pure Sb2Se3 selenium telluride nanorod; and second step, placing the selenium telluride nanorod prepared in the previous step and sulfur powder in a mortarto separate sulfur, and performing a reaction at 150-160 DEG C for 10-16h to prepare the lithium-sulfur battery anode material. The lithium-sulfur battery anode material provided by the invention isused as a positive electrode pole piece of a battery and has excellent electrochemical performance.

Description

technical field [0001] The technical solution of the present invention relates to a positive electrode material composed of metal selenide nanometer material and sulfur compound, specifically a preparation method of a novel positive electrode material for a lithium-sulfur battery, and a lithium-sulfur battery containing the new positive electrode material. Background technique [0002] With the advent of the mobile Internet era, electric vehicles, hybrid vehicles and energy storage devices have developed rapidly, and people's demand for these efficient and economical energy storage systems has also greatly increased. Under the background of such a big era, commercial lithium-ion battery cathode materials (such as LiMn 2 o 4 、LiCoO 2 、LiFePO 4 etc.) due to the limitation of its theoretical specific capacity, it is difficult to achieve a major breakthrough in a short period of time. Since the theoretical specific capacity of elemental sulfur is as high as 1675mAh / g, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/38H01M10/0525H01M4/58
CPCH01M4/362H01M4/38H01M4/48H01M4/58H01M10/0525Y02E60/10
Inventor 张永光田园
Owner SYNERGY INNOVATION INST OF GDUT HEYUAN
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