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Animal glue binder for lithium-sulfur battery cathode and preparation method of animal glue binder

A technology of lithium-sulfur battery and adhesive binder, applied in battery electrodes, lithium storage batteries, non-aqueous electrolyte storage batteries, etc., can solve the problems of environmental pollution, difficult process control and high cost

Active Publication Date: 2021-09-07
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide a novel binder for lithium-sulfur batteries prepared from natural biopolymer animal glue, which has the advantages of low cost, simple synthesis process, and basically insoluble in commonly used organic compounds. Electrolyte solvent overcomes the shortcomings of current PVDF such as high cost, difficult process control and environmental pollution, thereby replacing traditional PVDF binders and has the potential for large-scale commercial application

Method used

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  • Animal glue binder for lithium-sulfur battery cathode and preparation method of animal glue binder
  • Animal glue binder for lithium-sulfur battery cathode and preparation method of animal glue binder
  • Animal glue binder for lithium-sulfur battery cathode and preparation method of animal glue binder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put 28.0wt.% BG and 54wt.% water in a three-necked flask, heat it in a water bath at 50°C, stir mechanically at 100r / min for 30min, then slowly add 100mL of 1mol / L citric acid, and continue at 100r / min in a water bath at 50°C After mechanically stirring for 40 minutes, take out the three-neck flask and place it in an oil bath at 70°C, slowly add 7.0wt.% of L-RG powder, stir mechanically at 250r / min for 5 hours, and filter while hot to remove the incompletely dissolved bone glue gel; then , pass 1.2% N 2 , under heating in an oil bath at 100°C, add 11.0wt.% of C 8 h 12 ClNO 2 , heated in an oil bath at 100°C, stirred at 400r / min for 12h, poured out the glue solution in a rotary evaporator, evaporated and concentrated at 200r / min for 60min, then placed it in a vacuum dryer at -30°C to freeze into powder, and obtained Animal glue binders for lithium-sulfur battery cathodes.

Embodiment 2

[0031] Put 35.0wt.% BG and 47wt.% water in a three-necked flask, heat it in a water bath at 50°C, stir it mechanically at 100r / min for 30min, then slowly add 100mL of 1mol / L tartaric acid, and continue to stir it mechanically at 100r / min under a water bath at 50°C. After stirring for 40 minutes, take out the three-neck flask and place it in an oil bath at 70°C, slowly add 8.0wt.% of L-RG powder, stir mechanically at 250r / min for 5 hours, and filter while hot to remove the incompletely dissolved bone glue gel; then, Inject 1.2% N 2 , under heating in an oil bath at 100°C, add 10.0wt.% of C 8 h 12 ClNO 2 , heated in an oil bath at 100°C, stirred at 400r / min for 12h, poured out the glue solution in a rotary evaporator, evaporated and concentrated at 200r / min for 60min, then placed it in a vacuum dryer at -30°C to freeze into powder, and obtained Animal glue binders for lithium-sulfur battery cathodes.

Embodiment 3

[0033] Put 38.0wt.% BG and 40.1wt.% water in a three-necked flask, heat it in a water bath at 50°C, stir mechanically at 100r / min for 30min, then slowly add 100mL of 1mol / L malic acid, and continue 100r / min in a water bath at 50°C After stirring mechanically for 40 minutes, take out the three-neck flask and place it in an oil bath at 70°C, slowly add 7.6wt.% of L-RG powder, stir mechanically at 250r / min for 5 hours, and filter while hot to remove the incompletely dissolved bone glue gel; Subsequently, pass 1.2% N 2 , under heating in an oil bath at 100°C, add 14.3wt.% of C 8 h 12 ClNO 2, heated in an oil bath at 100°C, stirred at 400r / min for 12h, poured out the glue solution in a rotary evaporator, evaporated and concentrated at 200r / min for 60min, then placed it in a vacuum dryer at -30°C to freeze into powder, and obtained Animal glue binders for lithium-sulfur battery cathodes.

[0034] 2. Electrochemical performance test and characterization of animal glue binder for ...

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Abstract

The invention discloses an animal glue binder for a cathode of a lithium-sulfur battery and a preparation method of the animal glue binder. The animal glue binder for the cathode of the lithium-sulfur battery is formed by compounding and modifying animal glue by 3-sulfo-alanine and dopamine hydrochloride. The novel composite binder of the lithium-sulfur battery is prepared from natural biopolymer animal glue to replace polyvinylidene chloride as a traditional binder, and amino and carboxyl in animal glue molecules are respectively subjected to amidation reaction with carboxyl in 3-sulfo-alanine molecules and amino in dopamine hydrochloride molecules; the cathode active material can be fixed by a-SO3H group in the 3-sulfo-alanine molecule through a substitution reaction, so that the utilization rate of the sulfur active material is increased; and catecholamine groups in dopamine hydrochloride can more firmly protect the structural integrity of the sulfur cathode. The animal glue composite modified binder not only can be used as a binder, but also can be used as a strong dispersant of a cathode material, and the binder is simple to prepare and synthesize, and has good electrochemical stability and longer cycle life.

Description

technical field [0001] The invention belongs to the technical field of lithium-sulfur batteries, and in particular relates to an animal glue binder used for lithium-sulfur battery cathodes and a preparation method thereof. Background technique [0002] High-performance binders should have extremely high adhesion of electrode materials to current collectors, and lithium-sulfur batteries with high energy density can meet all the requirements of energy storage devices such as mobile phones, electric vehicles, and charging treasures in modern life. However, the insulating properties of sulfur and sulfides, the dissolution and shuttling of polysulfides, and the volume fluctuation of sulfur still hinder their widespread use. At present, the research hotspot of lithium-sulfur batteries is to increase the interaction between insulating sulfur and conductive agents. Especially among the components in the sulfur cathode, the inner surface of the sulfur cathode is wrapped by a binder,...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M10/052
CPCH01M4/621H01M10/052Y02E60/10
Inventor 王天舒张少君王明雨
Owner SHANDONG JIAOTONG UNIV
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