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Symmetrical liquid flow battery based on salt caves as well as control method and application thereof

A technology of liquid flow battery and liquid flow battery stack, which is applied in the direction of fuel cell control, fuel cell, and fuel cell additives, etc., and can solve problems such as greater impact on the ecological environment, battery capacity attenuation, and high toxicity of active substances in strong acid systems. Achieve the effects of rich material selection, good sealing performance and improved comprehensive utilization

Pending Publication Date: 2019-02-26
CHINASALT JINTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few studies on organic flow batteries based on salt caverns. At present, more mature flow batteries mainly use inorganic electrolytes, such as vanadium flow batteries and zinc-bromine flow batteries. Problems such as high toxicity of substances have a great impact on the ecological environment. At the same time, due to the mutual penetration of positive and negative active materials, the capacity of the battery will continue to decline during long-term use. Therefore, it is necessary to solve the above problems for existing flow batteries. performance improvement

Method used

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  • Symmetrical liquid flow battery based on salt caves as well as control method and application thereof
  • Symmetrical liquid flow battery based on salt caves as well as control method and application thereof
  • Symmetrical liquid flow battery based on salt caves as well as control method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The underground depth is 600m, and the physical volume is 100,000m 3 , with a height of 80 m, a maximum diameter of 60 m, and two salt caverns with a geothermal temperature of 30° C. respectively serve as an electrolyte reservoir 20 containing positive electrolyte 28 and another electrolyte reservoir 20 containing negative electrolyte 29 , The wellhead of the salt cavern is provided with 8 casing pipes 30, the inner diameter of the injection-production inner pipe 32 is 20cm, and the outer diameter of the injection-production outer pipe 31 is 50cm. Both the positive electrode active material and the negative electrode active material are bipolar porphyrin active materials with a concentration of 1 mol / L, and the supporting electrolyte is 2 mol / L NaCl solution. The viscosity of the electrolyte is about 40mPas. The two pole plates 21 are a positive electrode and a negative electrode respectively, and both the positive electrode and the negative electrode are made of graph...

Embodiment 2

[0081] The underground depth is 800m, and the physical volume is 150,000m 3 , with a height of 80 m, a maximum diameter of 100 m, and two salt caverns with a geothermal temperature of 34° C. respectively serve as an electrolyte reservoir 20 containing positive electrolyte 28 and another electrolyte reservoir 20 containing negative electrolyte 29 , The wellhead of the salt cavern is provided with 10 casing pipes 30, the inner diameter of the injection-production inner pipe 32 is 30cm, and the outer diameter of the injection-production outer pipe 31 is 60cm. The positive active material and the negative active material are both methylviologen and ferrocene bipolar substances linked by amino groups, the chemical formula is shown in the following formula (1), the concentration is 0.8mol / L, and the supporting electrolyte is 2mol / L Na 2 SO 4 solution. The viscosity of the electrolyte is about 60mPas. The two pole plates 21 are a positive electrode and a negative electrode respec...

Embodiment 3

[0084] The underground depth is 1000m, and the physical volume is 200,000m 3 , with a height of 100 m, a maximum diameter of 140 m, and two salt caverns with a geothermal temperature of 38° C. respectively serve as an electrolyte reservoir 20 containing positive electrolyte 28 and another electrolyte reservoir 20 containing negative electrolyte 29 , the wellhead of the salt cavern is provided with 20 casing pipes 30, the inner diameter of the injection-production inner pipe 32 is 40cm, and the outer diameter of the injection-production outer pipe 31 is 80cm. The positive active material and the negative active material are both methyl viologen and TEMPO bipolar substances linked by amino groups. The chemical formula is shown in the following formula (2), and its concentration is 1.5mol / L. The supporting electrolyte uses 2mol / L NaCl and NaSO 4 mixture. The viscosity of the electrolyte is about 60mPas. The two pole plates 21 are respectively a positive electrode and a negativ...

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Abstract

The invention discloses a symmetrical liquid flow battery based on salt caves as well as a control method and application thereof. The symmetrical liquid flow battery comprises two electrolyte reservoirs and a liquid flow battery stack, wherein the electrolyte reservoirs are the salt caves with physical dissolving cavities formed after salt mining, an electrolyte is stored in each of the dissolving cavities, each of the electrolytes comprises a positive active substance, a negative active substance and a supporting electrolyte, both the positive active substance and the negative active substance are consistent and are water-soluble organic active molecules, and the electrolytes are under the protection of an inert gas environment; the liquid flow battery stack is communicated with the twoelectrolyte reservoirs, and the electrolytes in the electrolyte reservoirs are conveyed to the liquid flow battery stack by a pump so as to participate in the electrochemical reaction. The symmetricalliquid flow battery based on the salt caves avoids the capacity attenuation caused by electrolyte mutual penetration, simultaneously has the advantages of being high in capacity, high in sealing property, low in cost and the like, is suitable for a large-scale energy storage power stations and improves the comprehensive utilization rate of salt cave resources.

Description

technical field [0001] The invention belongs to the field of energy storage redox flow batteries, and in particular relates to a salt cave-based symmetrical flow battery, a control method for the symmetrical flow battery, and an application of the symmetrical flow battery. Background technique [0002] With the rapid development of the economy, the accompanying environmental and energy shortages and other issues have become increasingly serious, which has promoted the vigorous development of some clean energy sources, such as wind energy, solar energy and tidal energy. However, due to the discontinuity and instability of these renewable energy sources, their utilization is subject to a large number of restrictions, and the utilization rate is low. Therefore, it is necessary to vigorously develop energy storage technology to provide guarantee for the stability of the power grid. Among various energy storage technologies, flow battery energy storage technology is the first ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04298H01M8/18
CPCH01M8/04298H01M8/188Y02E60/50
Inventor 陈留平徐俊辉李丹马旭强王慧
Owner CHINASALT JINTAN
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