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All-iron redox energy storage cell, electrolyte of battery and preparation method of electrolyte

An energy storage battery and electrolyte technology, which is applied in the field of all-iron redox energy storage batteries, can solve the problems of high price and toxicity of metal vanadium salts, and achieve the effect of reducing price and avoiding toxicity.

Active Publication Date: 2012-01-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Although the technical solution of this patent can bring certain effects, the metal vanadium salt used in the all-vanadium redox flow battery is still relatively expensive and has certain toxicity. Therefore, researchers are working hard to find a suitable redox couple. , cheap electrolyte, and environmentally friendly, it opens up a new direction for the research of energy storage batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 25.02 grams of ferrous sulfate heptahydrate, 0.87 grams of potassium sulfate, and 0.287 grams of zinc sulfate into a 1500mL container, add 600mL of deionized water, stir until the solution is completely dissolved, then add deionized water dropwise until the solution is The volume reaches 900mL.

[0024] Put 300mL of the above-mentioned electrolyte into the negative electrode electrolyte storage tank of the all-iron redox energy storage battery, put 600mL into the positive electrode electrolyte storage tank, and enter the single cell with an active area of ​​9cm2 at a rate of 30mL / min. The current of 200mA is charged and discharged, the battery capacity is 1.28Ah, the current efficiency is 91%, and the voltage efficiency is 55%.

Embodiment 2

[0026] Weigh 974.99 grams of ferrous chloride tetrahydrate, 335.48 grams of potassium chloride, and 17.81 grams of manganese chloride into a 1500mL container, add 600mL of deionized water, stir until the solution is completely dissolved, and then add deionized water until the volume of the solution reaches 900 mL.

[0027] Put 300mL of the above-mentioned electrolyte into the negative electrode electrolyte storage tank of the all-iron redox energy storage battery, put 600mL into the positive electrode electrolyte storage tank, and enter the single cell with an active area of ​​9cm2 at a rate of 30mL / min. Charge and discharge at a current of 200mA, the battery capacity is 51.46Ah, the current efficiency is 95%, and the voltage efficiency is 58%.

Embodiment 3

[0029] Weigh 466.77 grams of ferrous chloride tetrahydrate, 120.36 grams of ammonium chloride, and 6.13 grams of zinc chloride into a 1500mL container, add 600mL of deionized water, stir until the solution is completely dissolved, and then add deionized water until the volume of the solution reaches 900 mL.

[0030] Put 300mL of the above-mentioned electrolyte into the negative electrode electrolyte storage tank of the all-iron redox energy storage battery, put 600mL into the positive electrode electrolyte storage tank, and enter the single cell with an active area of ​​9cm2 at a rate of 30mL / min. The current of 200mA is charged and discharged, the battery capacity is 25.73Ah, the current efficiency is 93%, and the voltage efficiency is 53%.

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Abstract

The invention discloses an all-iron redox energy storage cell, an electrolyte of the battery and a preparation method of the electrolyte. The all-iron redox energy storage cell comprises a bivalent iron ion electrolyte, which consists of an inorganic salt of bivalent iron ions and aqueous solution of supporting electrolyte and additives. In the all-iron redox energy storage cell, the nontoxic and harmless inorganic salt of the iron is used as an active substance; the active matters of a positive electrode and a negative electrode are the same iron element; different redox potentials are only formed according to different valence states; by using an electrochemical method, storage and release of electric energy are realized; the toxicity of the vanadium electrolyte is avoided; meanwhile, the price of the electrolyte is also greatly reduced; and the electrolyte is expected to be widely applied to a large-scale energy storage power station.

Description

technical field [0001] The invention relates to a redox energy storage battery in the technical field of secondary batteries, in particular to an all-iron redox energy storage battery, an electrolyte solution of the battery and a preparation method thereof. Background technique [0002] With the increasing calls for global environmental protection, the development of clean energy continues to heat up, and the demand for large-scale energy storage batteries used in conjunction with renewable energy such as wind energy and solar energy is also increasing. For example, all-vanadium redox flow batteries and sodium-sulfur batteries that are close to commercial applications. [0003] As an indispensable component system of smart grid - energy storage battery, large capacity, low cost, long life and green environmental protection are the basic characteristics that energy storage battery must possess, such as Chinese patent application number 200910148218.0 "for all vanadium liquid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCY02E60/528Y02E60/50
Inventor 余晴春胡明若屠恒勇
Owner SHANGHAI JIAO TONG UNIV
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