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Aqueous zinc ion battery and preparation method and application thereof

A zinc-ion battery, water system technology, applied in batteries, battery electrodes, secondary batteries, etc., can solve the problems of Mn dissolution of electrode materials, zinc dendrites, etc., to improve rate performance, improve electrical conductivity, and alleviate the problem of volume effect. Effect

Active Publication Date: 2020-03-06
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems such as the dissolution of Mn in the electrode material and the generation of zinc dendrites in the zinc negative electrode during the battery cycle.

Method used

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  • Aqueous zinc ion battery and preparation method and application thereof
  • Aqueous zinc ion battery and preparation method and application thereof
  • Aqueous zinc ion battery and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Preparation of the positive active material birnessite / carbon composite:

[0058] Dissolve 2.265g of anhydrous manganese sulfate in 50ml of water, add 200mg of carbon nanotubes, and ultrasonically disperse for 30 minutes at a power of 100W to obtain mixed solution A; dissolve 2.16g of sodium hydroxide in 90ml of water, add 10ml of hydrogen peroxide (30wt %) to obtain mixed solution B; at a stirring speed of 2000rpm, dissolve B and add it dropwise to A at a speed of 1mL / min, age for 24h, filter with suction, wash with water, ethanol, water and ethanol in sequence, and filter with suction Half an hour later, it was transferred to an oven at 50° C. and dried for 24 hours to obtain a birnessite / carbon composite material, wherein carbon nanotubes accounted for 10 wt% of the birnessite / carbon composite material.

[0059] Adopt X-ray powder diffractometer to carry out X-ray diffraction analysis to the birnessite / carbon composite material of the present embodiment, spectrogram ...

Embodiment 2

[0063] Preparation of the positive active material birnessite / carbon composite:

[0064] Dissolve 12.55g of manganese nitrate tetrahydrate in 50 ml of water, add 100 mg of graphene, and disperse ultrasonically for 30 minutes at a power of 100W to obtain mixed solution A; dissolve 3.85mL of ammonia water in 90 ml of water, add 15.3 ml of hydrogen peroxide (30wt%) to obtain Mixed solution B; under stirring at 2000rpm, add mixed solution B dropwise to mixed solution A at a rate of 1mL / min, age for 20h, filter with suction, wash with water, ethanol, water and ethanol in sequence, and filter with suction for half an hour Afterwards, it was transferred to an oven at 50°C and dried for 20 hours to obtain a birnessite / carbon composite material, wherein graphene accounted for 1 wt% of the birnessite / carbon composite material.

Embodiment 3

[0066] Preparation of the positive active material birnessite / carbon composite:

[0067] Dissolve 6.1273g of manganese acetate in 50 ml of water, add 1 gram of graphite, and disperse ultrasonically for 30 minutes at a power of 100W to obtain mixed solution A; dissolve 2.80 g of sodium hydroxide in 90 ml of water, add 12.3 ml of hydrogen peroxide (30wt%) to obtain a mixed Liquid B; under stirring at 2000rpm, dissolve B and add dropwise to A at a rate of 1mL / min, age for 16h, filter with suction, wash with water, ethanol, water, and ethanol in sequence, and transfer to Dry in an oven at 50° C. for 18 hours to obtain the birnessite / carbon composite material, wherein graphite accounts for 20 wt% of the birnessite / carbon composite material.

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Abstract

The invention relates to an aqueous zinc ion battery and a preparation method and application thereof. A birnessite / carbon composite cathode active material is synthesized by a co-precipitation method. Metal zinc powder is used as an anode active material, and a zinc sulfate-water-urea mixed solution is used as an electrolyte. A pole piece is prepared by using a slurry method. A battery cell is prepared by a winding method. The battery is prepared by a conductive adhesive bonding method. In the method, a carbon material and the birnessite are synthesized in situ. The battery prepared by the method can suppress the dissolution of the cathode material Mn. The urea-modified electrolyte can suppress the generation of dead zinc and zinc dendrites and extend the battery cycle life. A nylon net or chinlon net cathode current collector can reduce the cost and increase the energy density of the battery. A conductive adhesive bonding bus bar can prolong the battery life. The method of the invention is suitable for pilot scale-up production. The battery of the invention can be used as an electric bicycle power battery.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an aqueous zinc-ion battery and a preparation method and application thereof. Background technique [0002] Due to the demand of electric bicycles for energy storage batteries, different energy storage batteries are used as electric bicycle power batteries for research. The aqueous zinc-ion battery is a very promising candidate in this field due to its abundant raw material sources, environmental friendliness, high energy density and low price. [0003] Traditional zinc-ion battery cathode materials generally use MnO 2 , The negative electrode material is metal zinc sheet. This type of battery is a primary battery and cannot be recharged when it is used up, so it cannot be used for electric bicycle power batteries. [0004] Jun Liu (Nature Energy, 2016, 1(5): 16039.) reported α-MnO 2 It can reversibly deintercalate zinc ions in zinc sulfate weak acid electrolyte, and match w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/62H01M4/74H01M10/38H01M10/42
CPCH01M4/505H01M4/625H01M4/628H01M4/74H01M10/4235H01M10/38H01M2220/20Y02E60/10Y02P70/50
Inventor 侯之国董梦飞宋忠诚张雪倩熊亚丽
Owner JIANGSU UNIV OF TECH
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