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Zinc organic battery and application thereof

A technology of organic batteries and organic solvents, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as failure to meet grid energy storage applications, hidden safety hazards, and difficulties in recycling, so as to overcome dendrite problems and improve safety The effect of high reliability and low manufacturing cost

Active Publication Date: 2019-07-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Batteries that are currently being used for grid energy storage applications include: lead-acid batteries, lithium-ion batteries, flow batteries, high-temperature sodium-sulfur batteries, liquid metal batteries, etc., but all of them have high costs, insufficient service life, and difficulties in recycling. , There are problems such as potential safety hazards, which cannot meet the needs of grid energy storage applications

Method used

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  • Zinc organic battery and application thereof
  • Zinc organic battery and application thereof
  • Zinc organic battery and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] As attached to the manual figure 1 As shown, a stainless steel tank with an inner diameter of 10 cm, a wall thickness of 0.3 mm, and a height of 10 cm is used as a container; the inner wall surface has a layer of polypropylene lining with a thickness of 2 mm to play the role of insulation, while There is no polypropylene liner on the bottom, which acts as the negative current collector for the battery. Put 5 grams of zinc powder in the container as the zinc negative electrode, and contact with the bottom of the stainless steel pipe to ensure electric conduction. Add 30 milliliters of 5mol / L zinc bromide aqueous solution into the container as an aqueous electrolyte, the bromide ion in the aqueous electrolyte is the reduced state of the positive active material, and its oxidation state is bromine and tribromide ions. Then add 30 milliliters of hexanoic acid as an organic solvent. At room temperature, hexanoic acid is only slightly soluble in water, and most of the hexano...

Embodiment 2

[0069] Using the same battery structure as in Example 1, change the material added to the container: first add 100 grams of zinc powder to the container as a zinc negative electrode, and then add 20 ml of 1mol / L zinc chloride aqueous solution as an aqueous electrolyte. Then add 40 milliliters of 1mol / L tetrachloro-p-benzoquinone in 1,4-dioxane solution, tetrachloro-p-benzoquinone is the oxidation state of positive electrode active material, insoluble in water, and its reduced state is tetrachlorohydroquinone .

[0070] After the battery is manufactured, it is in a charging state and can be discharged directly. The discharge voltage is 1.1V and the capacity is 2000 mAh; the charging voltage is 1.5V and the Coulombic efficiency is 95%; after 1000 cycles, the discharge capacity is 1800 mAh.

Embodiment 3

[0072] As attached to the manual figure 2 As shown, a sealed polypropylene storage tank with an inner diameter of 10 cm, a wall thickness of 0.3 mm, and a height of 10 cm is used as a container. A twist of carbon fiber is used as a wire to pass through a small hole (0.2mm in diameter) at the bottom of the storage tank, and is in good contact with a piece of circular graphite felt with a diameter of 5cm and a thickness of 0.5cm at the bottom of the container, and the small hole is well sealed. The graphite felt is coated with 5g of zinc. The advantage of using carbon fiber to connect external circuits is that the carbon fiber will not be corroded by aqueous electrolyte and organic solution during long-term use. There is another 30ml of aqueous electrolyte in the container. The aqueous electrolyte includes magnesium sulfate, zinc chloride and ammonium chloride. The concentration of magnesium sulfate is 150g / L, the concentration of zinc chloride is 50g / L, and the concentration ...

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Abstract

The invention discloses a zinc organic battery and application thereof, and belongs to the field of batteries. The zinc organic battery is provided with a container, a positive active substance, a positive current collector, an organic solvent, a zinc negative electrode and an aqueous electrolyte are contained in the container, the organic solvent and the aqueous electrolyte are not mixed, and thus, the organic solvent and the aqueous electrolyte are layered under a gravity effect due to different density; the positive active substance has oxidization-reduction activity and has two forms of anoxidization state and a reduction state, and the two forms can be reversibly converted by electrochemical reaction; if the positive active substance is in a liquid state and is difficult to dissolvein the aqueous electrolyte, the organic solvent can be omitted, the positive active substance is used as the organic solvent, and the positive active substance and the aqueous electrolyte are layered;and the main ingredient of the zinc negative electrode is zinc, the zinc is immersed in the aqueous electrolyte and is not contacted with the organic solvent, and the aqueous electrolyte is a zinc salt-contained aqueous solution. The battery is long in cycle lifetime, high in safety and low in fabrication cost and can be used as a large-size rechargeable battery, and the application of large-scale energy storage is met.

Description

technical field [0001] The invention belongs to the field of batteries, and more specifically relates to a zinc-organic battery and its application. Background technique [0002] The effective use of new energy sources, such as solar energy and wind energy, is the hope of solving human energy problems. However, solar energy and wind energy have the characteristics of intermittent, fluctuating, and random, and cannot guarantee to match people's electricity demand in time. Therefore, energy storage technology is needed to store the electric energy generated by solar energy and wind energy, and then restore it when needed. freed. [0003] Among energy storage technologies, energy storage battery technology has the advantages of high energy efficiency and no geographical restrictions, and has become the key development target of countries all over the world. [0004] The performance requirements of batteries used as grid energy storage are quite different from those of other r...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/38Y02E60/10Y02P70/50
Inventor 沈越孟锦涛周良毅沈一丁黄云辉
Owner HUAZHONG UNIV OF SCI & TECH
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