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Semi-liquid lithium-sulfur battery

A lithium-sulfur battery, semi-fluid technology, applied in lithium batteries, battery electrodes, secondary batteries, etc., can solve problems such as limited capacity

Inactive Publication Date: 2012-01-18
李桂云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But as good as lithium batteries are, they are still not up to the tough task of powering the next generation of electric vehicles. The problem lies in the anode material of lithium batteries. The anode material of lithium batteries is lithium, which has a limited capacity.

Method used

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Effect test

Embodiment approach 1

[0014] Embodiment 1: Elemental sulfur, acetylene black was vacuum-dried at 60°C and 120°C for 12h before use, according to m (elemental sulfur): m (acetylene black): m (polytetrafluoroethylene, PTFE60% emulsion)=7: Prepare the anode material at a ratio of 2:1. First, mix and grind the elemental sulfur and acetylene black for 2 hours to mix the elemental sulfur and acetylene black evenly. Use absolute ethanol as a solvent. First, dissolve PTFE in absolute ethanol. 20ml of absolute ethanol, mixed evenly, quickly poured into the mixed powder of sulfur and acetylene black, stirred evenly, the obtained mixture was vacuum-dried at 70°C for 12h, and the absolute ethanol was evaporated to obtain a black lump.

Embodiment approach 2

[0015] Embodiment 2: Preparation of elemental sulfur-activated carbon composite anode material

[0016] Elemental sulfur, activated carbon (200 mesh), and acetylene black were vacuum-dried at 60°C and 120°C before use. Elemental sulfur and activated carbon were mixed and ball milled at a mass ratio of 8:2. The ball milling speed was 350 revolutions per minute. 0.5h, then grind for 6h, and repeat this for 24h, so that sulfur is fully embedded in the pores of activated carbon, and a carbon-sulfur composite is obtained, according to m (carbon-sulfur composite): m (acetylene black): m (PTFE; 60% emulsion )=8:1:1 ratio to prepare the anode material, first mix and grind the carbon-sulfur compound and acetylene black for 2 hours, so that the carbon-sulfur compound and acetylene black are evenly mixed, absolute ethanol is used as a solvent, and PTFE is dissolved in absolute ethanol In the method, the dosage ratio is 1gPTFE plus 20ml absolute ethanol, after mixing evenly, quickly pour ...

Embodiment approach 3

[0017] Embodiment 3: Elemental sulfur and carbon materials are mixed and ball milled at a mass ratio of 5:1, the ball milling speed is 350 revolutions per minute, and the ball milling time is 6 hours. After the sulfur and carbon materials are fully mixed, they are put into an atmosphere box furnace and continuously Enter the argon gas for about 30 minutes to discharge the air inside and avoid the oxidation of sulfur at high temperature. Then, in a flowing argon atmosphere, mix the carbon material and elemental sulfur and heat it to about 200°C, keep it at this temperature for 5h, then raise the temperature to about 300°C, and keep it at this temperature for 2h to get black carbon sulfur Compound, the black carbon-sulfur compound is ground into a fine powder and mixed with the electrolyte to form an anode mixture.

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Abstract

The invention relates to a semi-liquid lithium-sulfur battery; elemental sulfur, organic or inorganic sulfur particles and electrolyte are mixed and contained into an anode liquid tank; cathode lithium powder, carbon particles and electrolyte are mixed and contained into a cathode liquid tank; an anode, a diaphragm and a cathode of a battery stack are assembled; and the anode liquid tank is connected with the anode of the battery stack through a liquid conveying pipe and a constant flow pump, and the cathode liquid tank is connected with the cathode of the battery stack through the liquid conveying pipe and the constant flow pump, so that the complete large-capacity semi-liquid lithium-sulfur battery is formed.

Description

[0001] The technical field to which the invention belongs: new energy Background technique [0002] Energy, materials and information technology are the three pillars of the world. The extensive use of petroleum has enabled human beings to enjoy a fast and convenient life, making the United States a country on wheels. The waste gas generated by burning petroleum fuels has endangered the environment. It is a good wish of people to call for a low-pollution, low-carbon and environmentally-friendly life, and to use electric vehicles to replace traditional vehicles. The key to electric vehicle technology is battery technology, and the maturity of battery technology will surely make the electric vehicle industry mature. [0003] The battery is composed of anode, cathode, electrolyte, diaphragm and so on. [0004] Lithium batteries have become a portable energy source in modern society. If you have mobile phones, MP3 players, and laptops, then you already have lithium batteries, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M4/136H01M4/58H01M10/36
CPCY02E60/122Y02E60/10
Inventor 李桂云
Owner 李桂云
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