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Electrode for zinc bromine storage battery and zinc bromine storage battery assembled by the same

A zinc-bromine storage battery and electrode technology, applied in battery electrodes, secondary batteries, active material electrodes, etc., can solve the problems of not considering hydrogen evolution inhibition in batteries, complex system design, low energy efficiency, etc., and achieve inhibition of bromine permeation and hydrogen Effects of precipitation, high energy density, and reduction of reaction area

Active Publication Date: 2015-06-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system did not propose an electrode suitable for zinc-bromine batteries, but directly used carbon felt electrodes for zinc-bromine flow energy storage batteries, resulting in low energy efficiency of the system, and because the suppression of hydrogen evolution in batteries was not considered, resulting in The system needs to be equipped with vent holes, and the system design is complicated, which is not conducive to sealing

Method used

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  • Electrode for zinc bromine storage battery and zinc bromine storage battery assembled by the same
  • Electrode for zinc bromine storage battery and zinc bromine storage battery assembled by the same
  • Electrode for zinc bromine storage battery and zinc bromine storage battery assembled by the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of positive electrode paste:

[0035] 1) Electrode paste slurry configuration: by weight, mechanically mix 5 parts of carbon powder, 2 parts of trimethylammonium bromide, 40 parts of zinc bromide, 1 part of PTFE, and 3 parts of distilled water into a paste for later use;

[0036] 2) Use the method of screen printing to evenly coat the electrode paste slurry on one side of the foamed titanium, with a loading capacity of 10mg / cm 2 ;

[0037] 3) Place the side coated with pole paste up and let it stand for 2 hours;

[0038] 4) Zinc bromide solution configuration: Prepare a 4mol / L zinc bromide solution, soak the prepared positive electrode in the solution for 10 minutes, assemble the battery, and assemble the side coated with the electrode paste facing the separator.

[0039] Preparation of negative electrode paste:

[0040] 1) Electrode paste configuration: by weight, mechanically mix 10 parts of carbon powder, 1 part of zinc powder, 50 parts of zinc bromide...

Embodiment 2

[0046] Preparation of positive electrode paste:

[0047] 1) Pole paste slurry configuration: by weight, 1 part of carbon powder, 1 part of trimethylammonium bromide, 10 parts of zinc bromide, 1 part of PTFE, and 3 parts of distilled water are mechanically mixed and stirred into a paste for later use;

[0048] 2) Use the method of scraping to evenly coat the electrode paste slurry on one side of the carbon felt; load: 5mg / cm 2 .

[0049] 3) Vacuum (0.1kpa) suction filtration for 10min on the side not coated with electrode paste;

[0050] 4) Zinc bromide solution configuration: Prepare a 4mol / L zinc bromide solution, soak the prepared positive electrode in the solution for 10 minutes, assemble the battery, and assemble the side coated with the electrode paste facing the separator.

[0051] Preparation of negative electrode paste:

[0052] 1) Electrode paste configuration: by weight, 1 part of carbon powder, 1 part of zinc powder, 10 parts of zinc bromide, 1 part of PVDF, and ...

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Abstract

The invention provides an electrode for a zinc bromine storage battery and a zinc bromine storage battery assembled by the same. Due to the characteristic that the zinc bromine storage battery is free of electrolyte flow, the method that a base body is matched with electrode paste is adopted. A battery active substance with high thickness is mixed in the electrode paste and a complexing agent and a hydrogen evolution inhibitor are added into the electrode paste. The problem that energy density is low caused by the fact that electrolyte of the zinc bromine storage battery can not flow, and bromine permeation and hydrogen separation of the battery are restricted so that an exhaust vent of the battery is simplified. Meanwhile, the characteristic that an electromechanical reaction concentrates on two sides of a separating film is combined so that the electrode paste of the electrode is in graded distribution inside the base body. The quantity of the electrode paste close to an electrolyte film is large and the quantity of the electrode paste close to a current collector is small so that the active substance inside the electrode paste is capable of participating in the electromechanical reaction, meanwhile a reaction area inside the electrode is not reduced and use ratio of the active substance is improved.

Description

technical field [0001] The invention relates to an electrode for zinc-bromine accumulator and the assembled zinc-bromine accumulator. Background technique [0002] Zinc-bromine redox flow battery (ZBB) is a low-energy, high-efficiency, environment-friendly liquid flow energy storage battery with high energy density and current efficiency, simple and easy to operate, and easy to use With the advantages of long life and low cost, it is mainly used in power grid peak regulation, renewable energy generation such as wind energy and solar energy, electric vehicles and other fields. [0003] When the zinc-bromine flow battery is charging and discharging, the circulation pump is used to drive the electrolyte to circulate in the battery. When the battery is not working, the electrolyte is extracted from the battery cavity and stored in the liquid storage tank, so that the electrolyte is disconnected between the positive and negative electrodes inside the battery, which can prevent t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/02H01M10/36H01M4/62
CPCY02E60/10
Inventor 张华民赖勤志张立群
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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