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Double-electron compound flow battery system based on salt cavern

An electronic compound and liquid flow battery technology, applied in fuel cells, electrochemical generators, regenerative fuel cells, etc., can solve the problems of limited solubility of active materials, prone to water electrolysis side reactions, and easy cross-contamination of electrolytes, etc., to achieve Ease of serialization, low production cost, and less production equipment

Active Publication Date: 2020-12-18
CHINASALT JINTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, aqueous organic flow batteries still face some challenges, such as limited solubility of active materials (organic substances), easy cross-contamination of electrolytes, low operating current density, and prone to water electrolysis side reactions, etc.

Method used

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  • Double-electron compound flow battery system based on salt cavern
  • Double-electron compound flow battery system based on salt cavern
  • Double-electron compound flow battery system based on salt cavern

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Synthesis of TEMPO-4-sulfonic acid sodium salt

[0068] Add 5g (29.03mmol) 4-OH-TEMPO and 20mL dichloromethane solvent into the three-necked flask, after the 4-OH-TEMPO dissolves, add 2mL chlorosulfonic acid dropwise at room temperature, and continue stirring at room temperature for 20 minutes after the addition. After the reaction, saturated sodium bicarbonate solution was added dropwise to adjust the pH of the resulting reaction solution to 7, and then extracted twice with ethyl acetate to remove unreacted 4-OH-TEMPO. The solvent was spin-dried under reduced pressure to obtain a mixture containing TEMPO-4-sulfonic acid sodium salt and sodium sulfonate. The TEMPO-4-sulfonic acid sodium salt in the mixed solid was extracted with absolute ethanol, and the solvent was removed under reduced pressure to obtain a yellow solid. NMR characterization was not carried out due to free radicals contained in the molecule.

Embodiment 2

[0070] Synthesis of 1-(2-hydroxy-ethyl)-[4,4'-bipyridine]-1-onium bromide

[0071] Add 3.436g (22mmol) 4,4'-bipyridine and 50mL acetonitrile solvent into the three-necked flask, add 2.631g (20mmol95%) 2-bromoethanol after dissolving 4,4'-bipyridine, heat up to 90°C and reflux After stirring the reaction, an off-white precipitate gradually appeared after 8 hours, and the reaction was continued for 40 hours until the reaction was complete. The resulting reaction solution was cooled and suction-filtered, washed 3 times, and finally vacuum-dried to obtain 5.628 g of off-white powdery solid particles (named 1-(2-hydroxy-ethyl)-[4,4'-bipyridine]-1 -onium bromide, yield 91%)).

Embodiment 3

[0073] Synthesis of 1-(2-hydroxy-ethyl)-1'-(3-sulfo-propyl)-[4,4'-bipyridine]-1,1'-dibromide

[0074] Add 5.904g (21mmol) 1-(2-hydroxyl-ethyl)-[4,4'-bipyridine]-1-bromide, 2.467g (20mmol, 99%) 1,3- Propane sultone and 50mL acetonitrile solvent were heated to 90°C under reflux and stirred for reaction. After 4 hours, the off-white precipitate began to change into a light yellow precipitate, and the reaction was continued for 20 hours until complete reaction. The resulting reaction solution was cooled and suction-filtered, washed 3 times, and finally vacuum-dried to obtain 7.410 g of light yellow powdery solid particles (named 1-(2-hydroxyl-ethyl)-1'-(3-sulfonic acid group- Propyl)-[4,4'-bipyridine]-1,1'-onium bromide, yield 87.5%).

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Abstract

The invention discloses a double-electron compound flow battery system based on salt cavern, which comprises a positive electrode active substance and a negative electrode active substance, and is characterized in that TEMPO4-sodium sulfonate is used as the positive electrode active substance, and an asymmetric dual-electron viologen compound is used as the negative electrode active substance. According to the invention, the positive electrode active substance and the negative electrode active substance are easy to prepare, and the reaction conditions are mild, the synthesis route is short andthe cost is low. The double-electron compound flow battery system can be suitable for a battery environment of a salt cavern system, and has the advantages of environmental friendliness, high cycle efficiency, adjustable properties and the like.

Description

technical field [0001] The invention relates to the field of flow batteries, in particular to a double-electron compound flow battery system. Background technique [0002] In today's world, energy is an important material basis for human survival and development, and an important factor in promoting economic development. With the rapid development of human economy, the consumption of traditional fossil energy is increasing day by day, which has brought serious environmental pollution, so the development of renewable energy has become an indispensable way. However, these renewable energy sources are discontinuous, unstable, restricted by regional environment, and difficult to connect to the grid, resulting in low utilization rate, high wind and light abandonment rate, and waste of resources. Therefore, it is necessary to vigorously develop efficient, cheap, safe and reliable energy storage technology that can be used in conjunction with it. [0003] Due to the characteristi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18C07D213/30C07D213/34
CPCC07D213/30C07D213/34H01M8/188H01M2300/0002Y02E60/50
Inventor 徐俊辉陈留平武奕崔耀星李丹苏志俊郭方元马旭强
Owner CHINASALT JINTAN
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