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Lignin-based compound electrolyte for aqueous zinc ion battery and aqueous zinc ion battery based on lignin-based compound electrolyte

A zinc-ion battery, lignin-based technology, applied in the field of lignin-based composite electrolyte, can solve the problems of less than 5% utilization rate, resource waste environment, difficult to dissolve, etc., to improve safety, reduce corrosion, inhibit The effect of side effects

Active Publication Date: 2020-07-07
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Industrial lignin mainly comes from industrial wastes such as pulping and papermaking, cellulose ethanol, and wood hydrolysis. The annual output is as high as 70 million tons, but the utilization rate is less than 5%. Huge waste of resources and serious environmental pollution
[0005] Due to the poor water solubility of alkali lignin, enzymatic lignin, organic solvent lignin, and steam explosion lignin, the negatively charged functional groups in lignosulfonate, sulfonated lignin, and carboxylated lignin molecules will be destroyed by Zn 2+ shielding, making them difficult to dissolve in aqueous zinc ion salt solutions

Method used

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  • Lignin-based compound electrolyte for aqueous zinc ion battery and aqueous zinc ion battery based on lignin-based compound electrolyte
  • Lignin-based compound electrolyte for aqueous zinc ion battery and aqueous zinc ion battery based on lignin-based compound electrolyte
  • Lignin-based compound electrolyte for aqueous zinc ion battery and aqueous zinc ion battery based on lignin-based compound electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 1. Test the configuration of the electrolyte and the assembly of the aqueous zinc-ion battery based on it:

[0037] Prepare a mixed aqueous solution of 2mol / L zinc sulfate and 0.3mol / L manganese sulfate, 200g in total, add 15g ammonized alkali lignin, 15g hydroxylated enzymatic lignin, 5g hydroxylated organic solvent lignin and 5g aminated steam Explode the lignin, stir until the lignin is completely dissolved, and then adjust the pH value of the mixed solution to 4.5 to obtain the lignin-based composite electrolyte.

[0038] A positive electrode capable of reacting with zinc ions, a separator, a lignin-based composite electrolyte, and a zinc negative electrode are assembled into a battery case to obtain an aqueous zinc-ion battery.

[0039] 2. The configuration of the reference electrolyte and the assembly of the aqueous zinc-ion battery based on it:

[0040] The reference electrolyte is a mixed aqueous solution of 2mol / L zinc sulfate and 0.3mol / L manganese sulfate, w...

Embodiment 2

[0046] 1. Test the configuration of the electrolyte and the assembly of the aqueous zinc-ion battery based on it:

[0047] Prepare a mixed aqueous solution of 2mol / L zinc trifluoromethanesulfonate and 0.5mol / L manganese trifluoromethanesulfonate, a total of 200g, add 5g of hydroxylated lignosulfonate, 5g of aminated sulfonated lignin, and 5g of ammonium Carboxylated lignin, 15g of hydroxylated alkali lignin and 10g of ammonized enzymatic lignin were stirred until all lignin was dissolved, and then the pH value of the mixed solution was adjusted to 5.0 to obtain a lignin-based composite electrolyte.

[0048] A positive electrode capable of reacting with zinc ions, a separator, a lignin-based composite electrolyte, and a zinc negative electrode are assembled into a battery case to obtain an aqueous zinc-ion battery.

[0049] 2. The configuration of the reference electrolyte and the assembly of the aqueous zinc-ion battery based on it:

[0050] The reference electrolyte is a mix...

Embodiment 3

[0056] 1. Test the configuration of the electrolyte and the assembly of the aqueous zinc-ion battery based on it:

[0057] Prepare a mixed aqueous solution of 1mol / L zinc chloride, 0.5mol / L zinc bromide, 0.5mol / L zinc iodide, 0.3mol / L manganese chloride, 0.1mol / L manganese bromide and 0.1mol / L manganese iodide , a total of 200g, add 5g ammonized lignosulfonate, 5g hydroxylated sulfonated lignin, 5g hydroxylated carboxylated lignin, 15g aminated alkali lignin, 10g aminated enzymatic lignin and 10g ammonium The lignin-based organic solvent is stirred until the lignin is completely dissolved, and then the pH value of the mixed solution is adjusted to 4.3 to obtain a lignin-based compound electrolyte.

[0058] A positive electrode capable of reacting with zinc ions, a separator, a lignin-based composite electrolyte, and a zinc negative electrode are assembled into a battery case to obtain an aqueous zinc-ion battery.

[0059] 2. The configuration of the reference electrolyte and ...

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Abstract

The invention belongs to the field of aqueous zinc ion batteries, and discloses a lignin-based compound electrolyte for an aqueous zinc ion battery and the aqueous zinc ion battery based on the lignin-based compound electrolyte. The lignin-based compound electrolyte comprises the following components in parts by weight: 100 parts of modified lignin, and 150-100000 parts of a water-phase electrolyte (a mixed solution of a water-soluble zinc salt and a water-soluble manganese salt). The lignin-based compound electrolyte disclosed by the invention is applied to an aqueous zinc ion battery, and can inhibit the side reaction of the positive electrode to a certain extent, reduce the corrosion of the zinc negative electrode, and regulate and control the zinc ions to be uniformly dissolved out anddeposited on the surface of the zinc negative electrode in the charging and discharging process to inhibit the formation and growth of zinc dendrites, thereby greatly enhancing the multiplying powerand cycle performance of the aqueous zinc ion battery. Besides, the lignin provided by the invention is wide in source, renewable and low in price, is beneficial to development of green and environment-friendly aqueous zinc ion batteries with excellent performance and low cost, and is beneficial to smooth implementation of future large-scale energy storage systems.

Description

technical field [0001] The invention belongs to the field of water-based zinc-ion batteries, and in particular relates to a lignin-based compound electrolyte used for water-based zinc-ion batteries and a water-based zinc-ion battery based thereon. Background technique [0002] At present, the development of large-scale energy storage systems (LSESS) with high energy density, long service life, safety, low cost and environmental friendliness is an important direction to realize the sustainable development of human society. Aqueous batteries are most promising for the establishment of LSESS due to their high electrolyte safety and low manufacturing costs. However, commercial aqueous batteries, such as lead-acid batteries, nickel-chromium batteries, and nickel-metal hydride batteries, all have the risk of heavy metal pollution and corrosion hazards due to leakage, and these batteries have low energy density and short cycle life. Therefore, the development of new aqueous batter...

Claims

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Application Information

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IPC IPC(8): H01M10/02H01M10/36
CPCH01M10/02H01M10/36H01M2300/0005Y02E60/10
Inventor 许敬亮熊文龙吕永坤阿拉牧胡心航王明海茂貞
Owner ZHENGZHOU UNIV
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