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A zinc-based ionic liquid electrolyte for a negative electrode of a flow battery and a preparation method thereof

A flow battery and ionic liquid technology, applied in the field of electrochemical energy storage, can solve the problems that the energy density is difficult to further increase, and the high energy density of the energy storage battery cannot be met.

Inactive Publication Date: 2017-10-27
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the solubility of active materials in water solvents, the energy density of zinc anode flow batteries in water media is difficult to further increase; the energy density is generally below 50Wh / L, which cannot meet the growing demand for high energy density of energy storage batteries

Method used

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  • A zinc-based ionic liquid electrolyte for a negative electrode of a flow battery and a preparation method thereof
  • A zinc-based ionic liquid electrolyte for a negative electrode of a flow battery and a preparation method thereof
  • A zinc-based ionic liquid electrolyte for a negative electrode of a flow battery and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare 100 g of 1-methyl, 3-propylimidazolium zinc fluorotrifluoroacetate ionic liquid (n=1)+0.5% NaF electrolyte.

[0020] First weigh 32.74 grams of zinc fluoride, put it in a 250mL beaker, and place it in a 60°C oven for 6 hours; then grind the zinc fluoride to 1000 mesh, and place it in a 60°C oven for 2 hours; finally weigh 66.76 grams of 1- Methyl, 3-propyl imidazolium trifluoroacetate ionic liquid, move it into a beaker; add the above-mentioned dried zinc fluoride into the beaker, fully react; add 0.50 g of 1000 mesh sodium fluoride, stir for 2 hours; Electrolyte to be prepared.

Embodiment 2

[0022] Prepare 100 g of 1-methyl, 3-propylimidazolium zinc fluorotrifluoroacetate ionic liquid (n=2)+5% NaF electrolyte.

[0023] First weigh 47.04 grams of zinc fluoride, put it in a 250mL beaker, and place it in a 40°C oven for 18 hours; then grind the zinc fluoride to 500 mesh, and place it in a 40°C oven for 6 hours; finally weigh 47.96 grams of 1- Methyl, 3-propylimidazolium trifluoroacetate ionic liquid, moved into a beaker; add the above-mentioned dried zinc fluoride to the beaker, fully react; add 5 grams of 500 mesh sodium fluoride, stir for 5 hours; to obtain Electrolyte to be prepared.

Embodiment 3

[0025] Prepare 100 g of 1-methyl, 3-propylimidazolium zinc fluorotrifluoroacetate ionic liquid (n=3)+10% NaF electrolyte.

[0026] First weigh 53.58 grams of zinc fluoride, put it in a 250mL beaker, and place it in a 50°C oven for 12 hours; then grind the zinc fluoride to 800 mesh, and place it in a 50°C oven for 4 hours; finally weigh 36.42 grams of 1- Methyl, 3-propylimidazolium trifluoroacetate ionic liquid, moved into a beaker; add the above-mentioned dried zinc fluoride to the beaker, fully react; add 10 grams of 800 mesh sodium fluoride, stir for 3 hours; to obtain Electrolyte to be prepared.

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Abstract

The invention relates to a large-scale energy storage liquid flow battery technology, in particular to zinc based ionic liquid electrolyte for a liquid flow battery negative electrode and a preparation method of the zinc-based ionic liquid electrolyte and belongs to the field of electrochemical energy storage. The zinc-based ionic liquid electrolyte for the liquid flow battery negative electrode and the preparation method of the zinc-based ionic liquid electrolyte are characterized in that zinc-based ionic liquid is solvent and also an active substance, and the molar ratio of the zinc element to the zinc based ionic liquid serving as solvent is (1-3):1 which far exceeds the molar ratio, namely 1:28, of the zinc element in water medium zinc electrolyte to solvent water, so that energy and density of a non-water medium liquid flow system with the zinc based ion liquid as the negative electrode electrolyte are far larger than a corresponding water medium system and are generally three times or above that of the corresponding water medium system.

Description

technical field [0001] The invention relates to a large-scale energy storage flow battery technology, in particular to a zinc-based ionic liquid electrolyte for a negative electrode of a flow battery and a preparation method thereof, belonging to the field of electrochemical energy storage. Background technique [0002] Flow batteries are electrochemical systems capable of large-scale energy storage. It has a different battery structure from conventional batteries, and its active materials are not on the electrodes, but in the electrolyte; this structural feature is similar to fuel cells, but the manufacturing cost is lower than fuel cells, and the production process is more advanced than lead-acid batteries and fuel cells. Batteries are relatively simple. Liquid flow batteries can be deeply discharged, have high energy efficiency, and have a power of up to megawatts. They can be used in a wide range of applications. The field has a cost-effective advantage over lithium-io...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 谢志鹏杨斌刘柏雄舒琪
Owner JIANGXI UNIV OF SCI & TECH