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Lithium ion liquid flow battery

A flow battery, lithium ion technology, applied in the direction of regenerative fuel cells, battery pack components, circuits, etc., can solve the problems of battery short circuit, affecting battery safety performance and work efficiency, etc., to improve safety performance and cycle life, avoid Effect of Internal Short Circuit

Active Publication Date: 2013-07-03
BEIJING HAWAGA POWER STORAGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem with the above-mentioned lithium-ion flow battery is that both the positive suspension in the positive reaction chamber (7) and the negative suspension in the negative reaction chamber (11) are in direct contact with the porous diaphragm (10). Completely avoid flowing electrode active material particles and conductive agents from being embedded in the pores of the porous separator (10), and thus cause a short circuit inside the battery, thereby seriously affecting the safety performance and working efficiency of the battery

Method used

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Examples

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Embodiment 1

[0031] The present invention provides an embodiment of fixing the positive electrode layer:

[0032] The fixed positive electrode layer can be obtained by coating the mixture of positive electrode active material, conductive agent and binder on the porous substrate, and the specific process steps include:

[0033] 1) Lithium iron phosphate, carbon black, and polyvinylidene fluoride are mixed and dissolved in a certain amount of methylpyrrolidone organic solution according to the mass ratio of 7:2:1, and fully stirred evenly to prepare positive electrode slurry.

[0034] 2) Evenly coating the positive electrode slurry above on the foamed nickel substrate with a coating thickness of 100 microns.

[0035] 3) Drying the coated nickel foam substrate under the condition of 60° C. to 80° C. for 12 hours.

[0036] 4) Compacting the dried positive electrode slurry and the foamed nickel substrate under a pressure of 5MPa-20MPa to prepare a fixed positive electrode layer.

Embodiment 2

[0038] The present invention provides an embodiment of fixing the negative electrode layer:

[0039] The fixed negative electrode layer can be obtained by coating the mixture of negative electrode active material, conductive agent and binder on the porous substrate, and the specific process steps include:

[0040] 1) Lithium titanate, carbon black, and polyvinylidene fluoride are mixed and dissolved in a certain amount of methylpyrrolidone organic solution according to a mass ratio of 7:2:1, and fully stirred evenly to prepare negative electrode slurry.

[0041] 2) Coating the above-mentioned negative electrode slurry evenly on the porous polyolefin substrate with a coating thickness of 150 microns.

[0042] 3) Drying the coated porous polyolefin substrate under the condition of 60° C. to 80° C. for 6 hours.

[0043] 4) Compacting the dried positive electrode slurry and the porous polyolefin matrix under a pressure of 5MPa-20MPa to prepare a fixed negative electrode layer.

Embodiment 3

[0045] The present invention provides an embodiment of a lithium-ion flow battery:

[0046] The lithium ion flow battery includes a positive electrode collector, a positive electrode reaction chamber, a positive electrode suspension, a fixed positive electrode layer, a porous diaphragm, a negative electrode reaction chamber, a negative electrode suspension, and a negative electrode collector. A fixed positive electrode layer is provided between the positive electrode reaction chamber and the porous diaphragm of the lithium ion flow battery, and electron conduction is performed between the fixed positive electrode layer and the positive electrode current collector through the positive electrode suspension.

[0047] The positive electrode current collector is metal aluminum foil, the positive electrode active material particles of the positive electrode suspension are lithium nickel manganese cobalt compound particles, the fixed positive electrode layer is a mixture of lithium ir...

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Abstract

The invention discloses a lithium ion liquid flow battery, belonging to a chemical energy storage battery technology field. A fixed electrode layer is arranged between an electrode reaction chamber and a diaphragm of the lithium ion liquid flow battery of the invention, thereby avoiding the direct contact between the diaphragm and a flowing electrode suspension liquid, effectively avoiding internal short circuit of the battery, and raising safety performance and work efficiency of the battery.

Description

technical field [0001] The invention belongs to the field of chemical energy storage batteries, in particular to lithium ion flow batteries. Background technique [0002] The widespread use of electrical energy is considered one of the greatest achievements of mankind in the twentieth century. The power industry has become one of the most important basic industries in the country. The development of battery technology also plays a huge role in the application of electric energy. Low-cost, scalable energy storage remains the key to continued development of renewable energy technologies (wind, solar) and improved grid efficiency. Electrochemical energy storage occupies a pivotal position in electric energy applications due to its advantages of high energy density, simplicity and reliability in providing power. [0003] Lithium-ion battery, as an electrochemical battery, has the advantages of high energy density, long life, and environmental protection. After years of devel...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M8/18
CPCY02E60/50
Inventor 陈永翀武明晓王秋平张萍韩立
Owner BEIJING HAWAGA POWER STORAGE TECH
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