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Alkali metal flow battery, and preparation method and application thereof

A technology of flow batteries and alkali metals, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low voltage of flow batteries and low energy density of flow batteries, and achieve battery safety protection and easy centralized processing , high efficiency effect

Active Publication Date: 2013-03-20
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of low energy density and low voltage of conventional flow batteries, and provide a flow battery with high energy density and high voltage, its preparation method and application

Method used

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  • Alkali metal flow battery, and preparation method and application thereof
  • Alkali metal flow battery, and preparation method and application thereof
  • Alkali metal flow battery, and preparation method and application thereof

Examples

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Embodiment 1

[0039] This example is used to illustrate the alkali metal flow battery of the present invention.

[0040] The positive electrode material is Ni(OH) 2 , the weight percent composition of positive electrode slurry is 28% Ni(OH) 2 , 2% carbon black and 70% electrolyte, the negative electrode material is metal lithium sheet, the positive electrode electrolyte is 1mol / L LiOH aqueous solution, the positive electrode current collector is made of stainless steel, and the negative electrode electrolyte is 1mol / L LiClO 4 PC (propylene carbonate) solution, the diaphragm uses an inorganic ceramic membrane LiCGC (Li 1+x+y Al x Ti 2-x Si y P 3-y o 12 ), charge and discharge at a rate of O.1C, the voltage range is 3.75 ~ 3V, the charge and discharge curve is as follows figure 2 shown.

Embodiment 2

[0042] This example is used to illustrate the alkali metal flow battery of the present invention.

[0043] The positive electrode material is Ni(OH) 2 , the weight percent composition of positive electrode slurry is 30% Ni(OH) 2 , 3% carbon black and 67% electrolyte, the negative electrode material is sodium metal, the positive electrode electrolyte is 2mol / L NaOH aqueous solution, the positive electrode collector is graphite rod, and the negative electrode electrolyte is 1mol / L NaClCl 4 EPC (ethylene propyl carbonate) solution, the diaphragm uses an organic polymer sodium ion conductor membrane, specifically a Nafion composite membrane treated with sodium.

[0044] The specific sodiumization process is:

[0045] a. Treat the film at 85°C in a hydrogen peroxide solution with a concentration of 4V% for 1 hour;

[0046] b. Rinse 4 times with deionized water;

[0047] c. The membrane was exposed to a concentration of 0.5M H 2 SO 4 Treat at 85 degrees for 1 hour;

[0048] d...

Embodiment 3

[0053] This example is used to illustrate the alkali metal flow battery of the present invention.

[0054] The cathode material is carbon-coated LiFePO 4 , the weight percent composition of the positive electrode slurry is 24% carbon-coated LiFePO 4 , 1% carbon nanotubes and 75% electrolyte, the negative electrode material is metal lithium sheet, and the positive electrode electrolyte is 2mol / L Li 2 SO 4 Aqueous solution, the positive electrode current collector is made of aluminum sheet, and the negative electrode electrolyte is 1.5mol / L LiBF 4 EC-DMC (1:1) solution (that is, ethylene carbonate-dimethyl carbonate, the volume ratio is 1:1), and the diaphragm adopts the inorganic ceramic membrane LiCGC (Li 1+x+y Al x Ti 2-x Si y P 3-y o 12 ), charge and discharge at a rate of 0.1C, the voltage range is 4.2-2.5V, and the capacity retention rate is as follows Figure 4 shown.

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PUM

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Abstract

The invention provides an alkali metal flow battery comprising a positive electrode current collector, a negative electrode, positive electrode slurry, a negative electrode electrolyte, a separation film, an encapsulation shell, a positive electrode slurry storage tank, and a negative electrode electrolyte storage tank. The positive electrode current collector, the negative electrode, the separation film, part of the positive electrode slurry, and part of the negative electrode electrolyte are accommodated in the encapsulation shell. The separation film is positioned between the positive electrode current collector and the negative electrode, and separates the positive electrode slurry and the negative electrode electrolyte. The positive electrode slurry comprises a positive electrode active material, a conductive agent, and positive electrode electrolyte. The negative electrode is an alkali metal electrode. The invention also provides the application of the alkali metal flow battery in large-scale electricity storage in solar power generation or wind power generation.

Description

technical field [0001] The invention relates to a liquid flow battery and its preparation method and use, in particular to an alkali metal flow battery and its preparation method and use. Background technique [0002] Since Japan's SONY company successfully launched lithium-ion batteries, lithium-ion battery products have been widely used in electronic products and military fields, and are currently developing towards the automotive industry and large-scale energy storage. [0003] The liquid vanadium battery is a redox flow battery in which the active material is in a circulating liquid state. After more than ten years of development, the related technology has matured, and many countries have realized its industrial application. Since the liquid active material of the liquid vanadium battery is stored in the liquid storage tank outside the stack, the battery has a large capacity, is easy to adjust, has a long life, and the active material can be recycled. If it is treated ...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M4/02H01M4/36H01M10/38
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 胡勇胜简泽浪李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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