Flow battery positive electrode electrolyte based on tetrathiafulvalene dicarboxylic acid ethyl ester and preparation method of flow battery positive electrode electrolyte

A technology of ethyl tetrathiofulvalene dicarboxylate and ethyl fulvalene dicarboxylate, which can be used in fuel cells, regenerative fuel cells, circuits, etc., can solve problems such as inability to use water and narrow electrochemical window. , to achieve the effect of high redox potential, simple preparation and simple synthesis

Active Publication Date: 2021-01-26
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Flow battery positive electrode electrolyte based on tetrathiafulvalene dicarboxylic acid ethyl ester and preparation method of flow battery positive electrode electrolyte
  • Flow battery positive electrode electrolyte based on tetrathiafulvalene dicarboxylic acid ethyl ester and preparation method of flow battery positive electrode electrolyte
  • Flow battery positive electrode electrolyte based on tetrathiafulvalene dicarboxylic acid ethyl ester and preparation method of flow battery positive electrode electrolyte

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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 positive electrode electrolyte based on tetrathiafulvalene dicarboxylic acid ethyl ester and a preparation method of the flow battery positive electrode electrolyte. Firstly, carbon disulfide and methyl propiolate are used as raw materials, tetrathiafulvalene dicarboxylic acid methyl ester is synthesized under the catalysis of tributylphosphine, and then tetrathiafulvalene dicarboxylic acid ethyl ester is obtained through ester exchange. The tetrathiafulvalene dicarboxylic acid ethyl ester is dissolved into an ethylene carbonate and dimethyl carbonate mixed solution containing 1mol / L of LiPF6, so as to obtain the flow battery positive electrode electrolyte based on the tetrathiafulvalene dicarboxylic acid ethyl ester. The obtained positive electrodeelectrolyte has the advantages of high oxidation-reduction potential, high volume specific capacity, good cycling 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 Applications(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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