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Zinc bromine single flow cell

A liquid flow battery, zinc-bromine single technology, applied in battery electrodes, fuel cell additives, regenerative fuel cells, etc., can solve the problems of unable to charge and discharge with high current, low energy density of batteries, etc., to improve zinc deposition structure, solve Corrosion and leakage problems, cost reduction effects

Inactive Publication Date: 2013-06-05
张华民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there is no circulating pump design on both sides of the positive and negative electrodes, the actual energy density of the battery is low, and it cannot be charged and discharged with a large current.

Method used

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  • Zinc bromine single flow cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of positive electrode paste:

[0037] 1) Electrode paste slurry configuration: by weight, mechanically mix 5 parts of carbon powder, N-methyl bromide, 2 parts of ethylpyrrolidine, 40 parts of zinc bromide, and 3 parts of deionized water to form a paste standby;

[0038] 2) Use the method of spraying to evenly coat the paste slurry on one side of the carbon paper, loading: 5mg / cm 2 ;

[0039] 3) 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.

[0040] Negative electrolyte preparation:

[0041] Prepare a 2mol / L zinc bromide solution for use.

[0042] Battery assembly:

[0043] A single cell sequentially includes a positive terminal plate, a positive electrode current collector, a positive electrode, a membrane, a negative electrode, and a negative terminal plate....

Embodiment 2

[0046] Preparation of positive electrode paste:

[0047] 1) Electrode paste slurry configuration: in parts by weight, mechanically mix 1 part of carbon powder, 1 part of trimethylammonium bromide, 10 parts of zinc bromide, and 3 parts of deionized water 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: 20mg / cm 2 .

[0049] 3) Zinc bromide solution configuration: Prepare a 4mol / L zinc bromide solution, soak the prepared positive electrode in the solution for 20 minutes, assemble the battery, and assemble the side coated with the electrode paste facing the separator.

[0050] Negative electrolyte preparation:

[0051] Prepare a 2mol / L zinc bromide solution for use.

[0052] Battery assembly:

[0053] A single cell sequentially includes a positive terminal plate, a positive electrode current collector, a positive electrode, a membrane, and a negative electrode and a negative termi...

Embodiment 3

[0056] Assembly of zinc bromine flow battery

[0057] 1) The positive pole is 36cm 2 , carbon felt with a thickness of 4mm

[0058] 2) The negative pole is 36cm 2 , the graphite plate

[0059] 3) Preparation of the negative electrode from the electrolyte: prepare 80 ml of 2 mol / L zinc bromide solution for use, and 40 ml of the positive and negative electrolytes.

[0060] Battery assembly:

[0061] A single cell sequentially includes a positive terminal plate, a positive electrode current collector, a positive electrode, a membrane, and a negative electrode and a negative terminal plate.

[0062] Assembly of zinc-bromine battery

[0063] Preparation of positive and negative electrode paste:

[0064] 1) Electrode paste slurry configuration: in parts by weight, mechanically mix 1 part of carbon powder, 1 part of trimethylammonium bromide, 10 parts of zinc bromide, and 3 parts of deionized water into a paste for later use;

[0065]2) Use the method of scraping to evenly coa...

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Abstract

A zinc bromine single flow cell is composed of a cell module, negative electrode electrolyte, a negative electrode liquid storage tank, a circulating pump and a circulating line. A static state packaging structure is adopted by a positive electrode side and assembly of a positive electrode bromine electrolyte circulating system is needless. Single flow arrangement is adopted by a system so that compared with a traditional zinc bromine flow cell with positive and negative double flow circulation, a set of circulating pump and circulating line is reduced. A sealing structure is adopted by the positive electrode side so that the problems of corrosion and leakage of bromine are solved, system energy consumption of the cell is reduced, cost is reduced and cell structure is simplified. Compared with a zinc bromine storage cell without a circulating system, due to the fact that a flow state electrolyte form is still adopted by the negative electrode side, zinc deposition structure is advanced, energy efficiency of the cell is improved and service life of the cell is prolonged.

Description

technical field [0001] The invention relates to a single-flow energy storage battery, in particular to a zinc-bromine single-flow battery. Background technique [0002] Zinc-bromine redox flow battery (ZBB) is a low-cost, high-efficiency, and environmentally friendly liquid flow energy storage battery, which has 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] The traditional zinc-bromine flow battery adopts a double-pump and double-pipe design. During the charging and discharging process, the circulating 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 disconnecte...

Claims

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Application Information

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IPC IPC(8): H01M8/04H01M4/86H01M8/18
CPCY02E60/528Y02E60/50
Inventor 张华民
Owner 张华民
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