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A kind of liquid flow battery cathode electrolyte based on ethyl tetrathiofulvalene dicarboxylate and preparation method thereof

A technology of ethyl tetrathiofulvalene dicarboxylate and ethyl fulvalene dicarboxylate, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve the problems of narrow electrochemical window and inability to use water , to achieve the effects of high redox potential, simple preparation and wide source of raw materials

Active Publication Date: 2021-11-30
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrochemical window of water is narrow
Many organic molecules are insoluble in water or have an electrochemical window larger than that of water, so water cannot be used as a solvent

Method used

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  • A kind of liquid flow battery cathode electrolyte based on ethyl tetrathiofulvalene dicarboxylate and preparation method thereof
  • A kind of liquid flow battery cathode electrolyte based on ethyl tetrathiofulvalene dicarboxylate and preparation method thereof
  • A kind of liquid flow battery cathode electrolyte based on ethyl tetrathiofulvalene dicarboxylate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 4

[0032] The preparation of embodiment 1 tetrathiofulvalene dicarboxylate methyl ester

[0033] Add 10mL (0.165mol) of carbon disulfide and 8.4g (0.1mol) of methyl propiolate as raw materials to 80mL of anhydrous tetrahydrofuran, then add 20.2g (0.1mol) of catalyst tributylphosphine, under the protection of argon, at -76 ℃ temperature reaction for 4 hours, after suction filtration, air drying at 80 ℃ for 6 hours, the crude product was chromatographed with a mixed solvent of cyclohexane and dichloromethane with a volume ratio of 2:1 to obtain tetrathiofulvalene dicarboxylate Acid methyl ester 2.1g.

Embodiment 2 4

[0034] The preparation of embodiment 2 ethyl tetrathiofulvalene dicarboxylates

[0035] Add 0.32g (0.001mol) methyl tetrathiofulvalenedicarboxylate to 40mL of absolute ethanol, then add 0.2mL of concentrated sulfuric acid, react at 90°C for 4 hours under the protection of argon, add 400mL of deionized water The precipitate was precipitated, collected by filtration, and purified by column chromatography with a mixed solvent of cyclohexane and dichloromethane at a volume ratio of 3:1 to obtain 0.313 g of ethyl tetrathiofulvalene dicarboxylate.

Embodiment 3～6

[0036] Examples 3-6 Preparation of positive electrode electrolyte for flow battery based on ethyl tetrathiofulvalene dicarboxylate

[0037] Two solvents, ethylene carbonate and dimethyl carbonate, were configured into 10mL mixed solutions according to different volume ratios, and then 1.52g of LiPF was added to the mixed solution 6 , and then add a certain quality of ethyl tetrathiofulvalene dicarboxylate, shake slightly until dissolved, and place it for use. The specific feeding formula of each embodiment is as shown in Table 1.

[0038] Table 1 The formula of the positive electrode electrolyte of flow battery based on tetrathiofulvalene dicarboxylate ethyl

[0039]

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Abstract

The invention relates to a flow battery cathode electrolyte based on ethyl tetrathiofulvalene dicarboxylate and a preparation method thereof. The present invention first uses carbon disulfide and methyl propiolate as raw materials, synthesizes methyl tetrathiofulvalene dicarboxylate under the catalysis of tributylphosphine, and then obtains ethyl tetrathiofulvalene dicarboxylate through transesterification . Dissolve ethyl tetrathiofulvalene dicarboxylate to contain 1mol / L LiPF 6 In the mixed solution of ethylene carbonate and dimethyl carbonate, the anode electrolyte of flow battery based on ethyl tetrathiofulvalene dicarboxylate is obtained. The obtained cathode electrolyte has the advantages of high redox potential, high volume specific capacity, good cycle stability and the like.

Description

technical field [0001] The invention relates to a liquid flow battery cathode electrolyte based on ethyl tetrathiofulvalene dicarboxylate and a preparation method thereof, belonging to the field of liquid flow batteries. Background technique [0002] In recent years, reports on flow batteries based on organic redox active materials have been increasing. Organic energy storage materials that have been studied include nitrogen oxide radical compounds, carbonyl compounds, organic sulfur compounds, etc. Organic compounds have the advantages of wide sources of synthetic raw materials and environmental protection. The solubility, chemical reversibility, and redox potential of organic compounds, which are closely related to battery performance, can be tuned through structural modification. In 2016, Liu et al. reported the use of 4-hydroxy-2,2,6,6-tetramethylpiperidine nitrogen oxide as the anode electrolyte material, commercial viologen as the anode electrolyte material, and chlo...

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 陈栋阳胡伟康林梅金
Owner FUZHOU UNIV
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