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Aqueous all-organic hybrid flow batteries based on conjugated microporous polymer anodes containing redox-active side group units

A technology of conjugated micropores and mixed liquids, applied in fuel cells, acidic electrolytes, aqueous electrolytes, etc., can solve the problems of low average current efficiency and poor cycle stability, and achieve high average current efficiency, long cycle life, and energy density high effect

Active Publication Date: 2021-11-23
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing aqueous organic flow batteries still have the problems of poor cycle stability and low average current efficiency of long-term charge-discharge cycles.

Method used

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  • Aqueous all-organic hybrid flow batteries based on conjugated microporous polymer anodes containing redox-active side group units
  • Aqueous all-organic hybrid flow batteries based on conjugated microporous polymer anodes containing redox-active side group units
  • Aqueous all-organic hybrid flow batteries based on conjugated microporous polymer anodes containing redox-active side group units

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Electrochemical synthesis of polyanthraquinone-based pyrrole negative electrode material

[0037] (1) Dissolve 0.11g of anthraquinone pyrrole (Mw273) and 0.43g of lithium perchlorate (Mw106.4) (the molar ratio of anthraquinone pyrrole to lithium perchlorate is 1:10) in 30mL of dimethyl methoxide in sulfone.

[0038] (2) The above solution is used as the electrolyte solution of the electrolytic polymerization reaction, placed in the electrolytic cell, the carbon felt is used as the working electrode and the counter electrode, and the Ag wire electrode is used as the reference electrode, and the constant potential electrolysis reaction is carried out.

[0039] (3) The electrolytic potential was set at 1.7V for 83 hours of electrolytic reaction.

[0040](4) The reacted electrolyte solution was suction-filtered, washed repeatedly with deionized water, and vacuum-dried at 60° C. for 12 hours to obtain the product polyanthraquinone-pyrrole.

[0041] figure 1 T...

Embodiment 2

[0044] Embodiment 2: the electrochemical synthesis of polynaphthoquinone-based pyrrole negative electrode material

[0045] (1) Dissolve 0.18 g of naphthoquinone pyrrole (Mw223) and 0.43 g of lithium perchlorate (the molar ratio of anthraquinone pyrrole to lithium perchlorate is 1:5) in 30 mL of dimethylformamide.

[0046] (2) The above solution is used as the electrolyte solution of the electrolytic polymerization reaction, placed in the electrolytic cell, the carbon felt is used as the working electrode and the counter electrode, and the Ag wire electrode is used as the reference electrode, and the constant potential electrolysis reaction is carried out.

[0047] (3) The electrolytic potential was set at 1.5V for 55 hours of electrolytic reaction.

[0048] (4) The reacted electrolyte solution was suction-filtered, washed repeatedly with deionized water, and vacuum-dried at 60° C. for 12 hours to obtain the product polyanthraquinone-pyrrole. The material pore size is about 0...

Embodiment 3

[0050] Embodiment 3: the electrochemical synthesis of polyquinoxalinylpyrrole negative electrode material

[0051] (1) Dissolve 0.10g quinoxalinylpyrrole (Mw195) and 0.43g lithium perchlorate (Mw106.4) (the molar ratio of anthraquinonepyrrole to lithium perchlorate is 1:8) in 30mL dimethyl in sulfoxide.

[0052] (2) The above solution is used as the electrolyte solution of the electrolytic polymerization reaction, placed in the electrolytic cell, the carbon felt is used as the working electrode and the counter electrode, and the Ag wire electrode is used as the reference electrode, and the constant potential electrolysis reaction is carried out.

[0053] (3) The electrolysis potential was set at 1.7V for 60 hours of electrolysis reaction.

[0054] (4) The reacted electrolyte solution was suction-filtered, washed repeatedly with deionized water, and vacuum-dried at 60°C for 24 hours to obtain the product polyquinoxalinylpyrrole. The material pore size is about 1.2nm.

[0055...

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Abstract

The invention belongs to the field of new energy, and in particular relates to an aqueous all-organic hybrid flow battery based on a conjugated microporous polymer negative electrode containing redox active side group units. The negative pole of the battery is a conjugated polymer with redox active side group units, the supporting electrolyte of the negative pole is a strong acid, the diaphragm is an ion-conducting membrane, the active electrolyte of the positive pole is a water-soluble quinone-based compound, and the positive pole is a carbon-based conductive material. The aqueous all-organic hybrid flow battery uses a strong acid aqueous solution as the electrolyte, and a solid electrode as the negative electrode. It has the advantages of both solid-state secondary batteries and flow batteries, and has low construction and operation costs, long cycle life, high energy power, and safety and environmental protection. It has broad application prospects in the fields of large-scale power storage of renewable energy and peak shaving of power grids.

Description

technical field [0001] The invention belongs to the field of new energy, and in particular relates to an aqueous all-organic hybrid flow battery based on a conjugated microporous polymer negative electrode containing redox active side group units. Background technique [0002] Renewable energy sources such as solar and wind energy are clean, environmentally friendly and abundant. However, their obvious regional and intermittent shortcomings force them to be equipped with high-efficiency battery systems to adjust surplus and balance output. The flow battery realizes the mutual conversion and energy storage of electrical energy and chemical energy through the valence conversion of reactive electroactive species. Since the reactive electroactive species are stored in the external storage tank of the battery system, its output power and energy storage capacity are independent of each other, so that the battery system can be optimized for power requirements, while the stored ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0005H01M2300/0085Y02E60/50
Inventor 许娟秦萌曹剑瑜石燕君
Owner CHANGZHOU UNIV