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A preparation method of flexible zinc-air battery based on zeolite imidazolate skeleton-67 derivatives

A zeolite imidazolate and air battery technology, which is applied to fuel cell half-cells and primary battery half-cells, battery electrodes, circuits, etc., can solve problems such as poor wearability, difficulty in providing, and large discharge current, and achieve The effect of enriching catalytic sites

Active Publication Date: 2021-03-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zinc foil and zinc sheet can only be used on flexible devices with a size of several square centimeters, and their wearability is poor
Spiral zinc wire and spring-shaped zinc wire have a small contact area with the electrolyte in flexible batteries, making it difficult to provide a large discharge current and causing waste of negative electrodes

Method used

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  • A preparation method of flexible zinc-air battery based on zeolite imidazolate skeleton-67 derivatives
  • A preparation method of flexible zinc-air battery based on zeolite imidazolate skeleton-67 derivatives
  • A preparation method of flexible zinc-air battery based on zeolite imidazolate skeleton-67 derivatives

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Experimental program
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Effect test

Embodiment 1

[0038] A method for preparing a flexible zinc-air battery based on zeolite imidazolate skeleton-67 (ZIF-67) derivatives, comprising steps as follows:

[0039] (1) Positive electrode: Using zeolite imidazolate framework-67 (ZIF-67) as raw material, it was annealed at 400°C for 5 hours in an air atmosphere to obtain Co 3 o 4 Catalyst (such as figure 1 shown). Using the prepared Co 3 o 4 An air electrode with a thickness of 1 mm was fabricated.

[0040] (2) Electrolyte: A: Take 4g of agar and add 40ml of deionized water, stir magnetically in a water bath at 80°C until completely dissolved. B: Prepare 6M KOH solution. Slowly add 20ml of B solution into A under magnetic stirring, and stir for 2h. Cool at room temperature to obtain a gel solid electrolyte, and control the thickness of the solid electrolyte to 1 mm.

[0041] (3) Negative electrode: Cut a metal zinc sheet with a thickness of 0.3 mm into a zinc sheet with a length of 5 cm and a width of 0.6 cm. Select a metal ...

Embodiment 2

[0045] A method for preparing a flexible zinc-air battery based on zeolite imidazolate skeleton-67 (ZIF-67) derivatives, comprising steps as follows:

[0046] (1) Positive electrode: Using zeolite imidazolate framework-67 (ZIF-67) as raw material, it was annealed at 300°C for 3 hours in an air atmosphere to obtain Co 3 o 4 positive catalyst. Using the prepared Co 3 o 4 An air electrode with a thickness of 2 mm was fabricated.

[0047] (2) Electrolyte: A: Take 5g of agar and add 50ml of deionized water, and magnetically stir in a water bath at 80°C until completely dissolved. B: Prepare 6M NH 4 Cl solution. Slowly add 30ml of B solution into A under magnetic stirring, and stir for 1h. Cool at room temperature to obtain a gel solid electrolyte, and control the thickness of the solid electrolyte to 1 mm.

[0048] (3) Negative electrode: Cut a metal zinc sheet with a thickness of 0.5 mm into a zinc sheet with a length of 5 cm and a width of 1 cm. Choose a metal wire with ...

Embodiment 3

[0052] A method for preparing a flexible zinc-air battery based on zeolite imidazolate skeleton-67 (ZIF-67) derivatives, comprising steps as follows:

[0053] (1) Positive electrode: using zeolite imidazolate framework-67 (ZIF-67) as raw material, annealing at 600°C for 3 hours in air atmosphere to obtain Co 3 o 4 positive catalyst. Using the prepared Co 3 o 4 An air electrode with a thickness of 2 mm was fabricated.

[0054] (2) Electrolyte: A: Add 4g of agar to 40ml of deionized water, and magnetically stir in a water bath at 90°C until completely dissolved. B: Prepare 3M KOH solution. Slowly add 30ml of B solution into A under magnetic stirring, and stir for 1h. Cool at room temperature to obtain a gel solid electrolyte, and control the thickness of the solid electrolyte to 1.5 mm.

[0055] (3) Negative electrode: Cut a metal zinc sheet with a thickness of 0.5 mm into a zinc sheet with a length of 5 cm and a width of 1 cm. Select a metal wire with a diameter of 1mm,...

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Abstract

The invention discloses a preparation method of a flexible zinc-air cell based on zeolite imidazate skeleton-67 derivative, and belongs to the technical field of the flexible energy device. The preparation method comprises the following steps: taking ZIF-67 as raw materials, annealing in the air atmosphere to prepare Co3O4 positive catalyst for a cell air electrode, assembling various flexible components to prepare the flexible zinc-air cell. By adopting the Co3O4 prepared by annealing the ZIF-67 as the positive catalyst, the ordered porous structure provides rich catalysis sites, various components of the cell are assembled as the cell after realizing the flexibility, thereby preparing the wearable flexible device. The preparation method disclosed by the invention provides theoretic basisand technical support for the actual application of the flexible zinc-air cell.

Description

technical field [0001] The invention relates to a preparation method of a flexible zinc-air battery based on zeolite imidazolate framework-67 (ZIF-67) derivatives, belonging to the technical field of flexible energy devices. [0002] technical background [0003] A zinc-air battery is a battery that uses oxygen in the air as the positive electrode active material and metal zinc as the negative electrode active material. Its open circuit voltage is about 14-1.5V. Zinc-air batteries have the advantages of large specific energy, stable discharge voltage, unlimited source of positive active material air, and low price. In recent years, flexible electronic devices have attracted extensive attention. Compared with traditional electronic devices, flexible devices have advantages such as convenient belt, bendable, wearable, and even implantable. The flexible zinc-air battery is a composite device that can simultaneously take advantage of the advantages of air batteries and flexible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/06H01M4/90H01M4/86
CPCH01M4/86H01M4/9016H01M12/06
Inventor 汪浩徐小龙李浩强谢明刘晶冰严辉
Owner BEIJING UNIV OF TECH
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