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Lithium-sulfur battery positive electrode material and cationic lithium-sulfur battery binding agent

A technology for lithium-sulfur batteries and cathode materials, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems that limit the wide application of lithium-sulfur batteries, battery safety hazards, and low utilization of active materials, so as to suppress the shuttle effect and improve The effect of operating voltage

Inactive Publication Date: 2018-09-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many problems, such as the insulation of sulfur, the "shuttle effect" caused by the dissolution of polysulfides in the electrolyte, the low utilization rate of active materials, and the safety hazards of lithium dendrites to batteries, limit the wide application of lithium-sulfur batteries.

Method used

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  • Lithium-sulfur battery positive electrode material and cationic lithium-sulfur battery binding agent
  • Lithium-sulfur battery positive electrode material and cationic lithium-sulfur battery binding agent

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A lithium-sulfur battery cathode material, comprising a current collector metal aluminum foil and an electrode slurry coated on the surface of the current collector metal aluminum foil, the electrode slurry contains a carbon-sulfur compound and a lithium-sulfur battery binder, and the lithium The sulfur battery binder comprises a polymer obtained by polymerizing N,N-methylenebisacrylamide and aminoethylpiperazine. The preparation method of the lithium-sulfur battery cathode material is:

[0023] Step 1: Weigh 3g of N,N-methylenebisacrylamide into a 150mL round bottom flask equipped with a magnetic stirrer, add 30ml of DMF, mix well, seal the bottle mouth with a reverse stopper, and ventilate with argon After 20 minutes, under argon protection and magnetic stirring, 2 g of aminoethylpiperazine was added with a syringe. After the pinhole was sealed, the reaction bottle was placed in a constant temperature water bath at 30 ° C. After stirring for 8 hours, a light yellow vi...

Embodiment 2

[0028] A lithium-sulfur battery cathode material, comprising a current collector metal aluminum foil and an electrode slurry coated on the surface of the current collector metal aluminum foil, the electrode slurry contains a carbon-sulfur compound and a lithium-sulfur battery binder, and the lithium The sulfur battery binder comprises a polymer obtained by polymerizing N,N-methylenebisacrylamide and aminoethylpiperazine. The preparation method of the lithium-sulfur battery cathode material is:

[0029] Step 1: take 3.5g of N, N-methylenebisacrylamide in a 150mL round bottom flask equipped with a magnetic stirrer, add the mixture of 40ml deionized water and DMF (the volume ratio of water and DMF is respectively : 1 / 4), mix evenly, seal the bottle mouth with a reverse stopper, pass argon gas for 20 minutes, under the protection of argon gas and magnetic stirring, add 2.3g aminoethylpiperazine with a syringe, after the pinhole is sealed, the reaction Put the bottle in a constant...

Embodiment 3

[0034] A lithium-sulfur battery cathode material, comprising a current collector metal aluminum foil and an electrode slurry coated on the surface of the current collector metal aluminum foil, the electrode slurry contains a carbon-sulfur compound and a lithium-sulfur battery binder, and the lithium The sulfur battery binder comprises a polymer obtained by polymerizing N,N-methylenebisacrylamide and aminoethylpiperazine. The preparation method of the lithium-sulfur battery cathode material is:

[0035] Step 1: Weigh 4g of N,N-methylenebisacrylamide in a 150mL round bottom flask equipped with a magnetic stirrer, add a mixture of 40ml deionized water and DMF (the volume ratio of water and DMF is respectively: 2 / 3), mix evenly, seal the bottle mouth with a reverse stopper, pass argon gas for 20 minutes, under the protection of argon gas and magnetic stirring, add 3g aminoethylpiperazine with a syringe, after the pinhole is sealed, place the reaction bottle on the In a constant t...

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Abstract

The invention provides a lithium-sulfur battery positive electrode material and a cationic lithium-sulfur battery binding agent. The lithium-sulfur battery positive electrode material is characterizedby comprising a current collector metal foil and electrode paste, wherein the electrode paste is coated on a surface of the current collector metal foil and contains a carbon-sulfur compound and thelithium-sulfur battery binding agent, and the lithium-sulfur battery binding agent comprises a polymer obtained by polymerization reaction of N, N-methylene-bisacrylamide and aminoethyl piperazine. The lithium-sulfur battery assembled by taking the prepared cationic binding agent as the lithium-sulfur battery binding agent can be directly used in a hybrid electric vehicle.

Description

technical field [0001] The invention belongs to the field of battery binders, and in particular relates to a lithium-sulfur battery cathode material and a cationic lithium-sulfur battery binder used for preparing the cathode material. Background technique [0002] Energy and the environment are hot issues that human beings are most concerned about in the 21st century. Energy is the cornerstone of social development and the driving force for world economic growth. Lithium sulfur batteries (Li.S batteries) are considered to be a potential next-generation high-energy battery system due to their high theoretical energy density and other advantages, and have become a research hotspot all over the world. Lithium-sulfur batteries generally use elemental sulfur as the positive electrode active material, metallic lithium as the negative electrode, and an organic liquid electrolyte for the secondary battery system. Studies have found that when elemental sulfur undergoes redox reactio...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/62
CPCH01M4/36H01M4/622Y02E60/10
Inventor 刘天西雒香缪月娥
Owner DONGHUA UNIV
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