Method for preparing lithium-sulfur battery positive plate by means of ion beam sputtering technology

An ion beam sputtering, lithium-sulfur battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of sulfur agglomeration, complex processes, restrictions, etc., to reduce interface resistance, simplify manufacturing processes, and improve electrical conductivity. sexual effect

Inactive Publication Date: 2018-09-04
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used composite methods include ball milling method, high temperature heat treatment method, heating reflux method, vacuum impregnation method, chemical precipitation method and gas phase loading method, etc. The ball milling method can only pulverize elemental sulfur to the submicron scale, and cannot contact carbon well. , the high-temperature heat treatment method enables sulfur to be embedded in the carbon channels to make the sulfur-carbon bond more tightly. The fly in the ointment is that sulfur may be agglomerated. Other methods are complicated in process and limited in application.
Moreover, the sulfur / carbon composite powder prepared by these methods also needs to be added with a binder, mixed into a slurry and coated on an aluminum foil to make a positive electrode sheet of a battery. Not only the composite effect is not ideal, but the process is complicated

Method used

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  • Method for preparing lithium-sulfur battery positive plate by means of ion beam sputtering technology
  • Method for preparing lithium-sulfur battery positive plate by means of ion beam sputtering technology
  • Method for preparing lithium-sulfur battery positive plate by means of ion beam sputtering technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Prepare a positive electrode sheet with a sulfur / carbon mass ratio of 7:3, a sulfur / carbon composite material thickness of 10 μm, and a desired shape and area

[0023] Before the sputtering operation starts, the aluminum foil 8 is cut into the required shape and area, and laid on the substrate holder 7 of the ion beam sputtering chamber 1 as a substrate, according to the sulfur target holder 4 and the carbon target holder 5 According to the specifications, cut and weigh the elemental sulfur block and elemental carbon block with a mass ratio of 7:3, and make the total amount of sulfur and carbon sufficient to deposit 10 μm thickness on the aluminum foil 8, and the obtained block sulfur 3 and block Bulk carbon 6 is respectively placed on the sulfur target support 4 and the carbon target support 5 as targets, and the ion beam sputtering chamber 1 is evacuated to 10 -4 Pa, using 100W power, emit an argon ion beam from the ion beam gun 2 to clean the surface of the...

Embodiment 2

[0025] Example 2 Prepare a positive electrode sheet with a sulfur / carbon mass ratio of 8:2, a sulfur / carbon composite material thickness of 60 μm, and a desired shape and area

[0026] Before the sputtering operation starts, the aluminum foil 8 is cut into the required shape and area, and laid on the substrate holder 7 of the ion beam sputtering chamber 1 as a substrate, according to the sulfur target holder 4 and the carbon target holder 5 According to the specifications, the elemental sulfur block and the elemental carbon block are cut and weighed at a mass ratio of 8:2, and the total amount of sulfur and carbon is sufficient to deposit a thickness of 60 μm on the aluminum foil 8, and the obtained block sulfur 3 and block Bulk carbon 6 is respectively placed on the sulfur target support 4 and the carbon target support 5 as targets, and the ion beam sputtering chamber 1 is evacuated to 10 -4 Pa, using 100W power, emit an argon ion beam from the ion beam gun 2 to clean the sur...

Embodiment 3

[0027] Example 3 Prepare a positive electrode sheet with a sulfur / carbon mass ratio of 9:1, a sulfur / carbon composite material thickness of 100 μm, and a desired shape and area

[0028] Before the sputtering operation starts, the aluminum foil 8 is cut into the required shape and area, and laid on the substrate holder 7 of the ion beam sputtering chamber 1 as a substrate, according to the sulfur target holder 4 and the carbon target holder 5 According to the specifications, cut and weigh the elemental sulfur block and the elemental carbon block with a mass ratio of 9:1, and make the total amount of sulfur and carbon sufficient to deposit 100 μm thickness on the aluminum foil 8, and the obtained block sulfur 3 and block Bulk carbon 6 is respectively placed on the sulfur target support 4 and the carbon target support 5 as targets, and the ion beam sputtering chamber 1 is evacuated to 10 -4Pa, using 100W power, emit an argon ion beam from the ion beam gun 2 to clean the surface o...

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Abstract

The invention discloses a method for preparing a lithium-sulfur battery positive plate by means of an ion beam sputtering technology. Preparation of the positive plate is conducted in an ion beam sputtering chamber, aluminium foil is used as a substrate, quantitative block sulfur and block carbon are used as target materials, after the ion beam sputtering chamber is vacuumized, an argon ion beam is adopted to bombard the block sulfur and the block carbon with different power alternately, sulfur atoms and carbon atoms are sputtered respectively and deposit on the surface of the aluminium foil,and then the lithium-sulfur battery positive plate with a sulfur / carbon composite material is obtained. The preparation method has the advantage that the alternate sputtering amounts of sulfur and carbon can be precisely controlled, so that the sulfur / carbon composite material is evenly mixed.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and relates to a method for preparing lithium-sulfur battery cathode sheets by ion beam sputtering technology. Background technique [0002] Due to its high specific capacity and high energy density, lithium-sulfur batteries are considered to be one of the most research-worthy secondary battery systems today, and sulfur / carbon composite materials are considered to be the positive electrode of lithium-sulfur batteries with the most development potential. Materials, on the one hand, the carbon material is used as a conductive framework to improve the conductivity of the sulfur cathode, on the other hand, the carbon material also provides a stable electrode structure for the elemental sulfur, ensuring the structural stability of the composite material. In the composite method, researchers mainly consider reducing the size of sulfur as much as possible so that it can be well combined wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139
CPCH01M4/139Y02E60/10
Inventor 闫时建张敏刚郭锦刘建生
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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