Flexible zinc-air battery based on polymer electrolyte

A zinc-air battery, polymer technology, applied in nanotechnology for materials and surface science, fuel cell-type half-cell and primary battery-type half-cell, nanotechnology, etc., can solve the problem of poor moisture retention and poor liquid absorption , low ionic conductivity and other problems, to achieve the effects of excellent flexibility, excellent charge-discharge cycle stability, liquid electrolyte absorption rate and electrolyte retention rate improvement

Active Publication Date: 2019-06-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has the defects of low ion conductivity, poor liquid absorption and poor moisture retention.

Method used

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  • Flexible zinc-air battery based on polymer electrolyte
  • Flexible zinc-air battery based on polymer electrolyte
  • Flexible zinc-air battery based on polymer electrolyte

Examples

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Effect test

Embodiment 1

[0037] This embodiment relates to a method for preparing a flexible zinc-air battery based on a polymer electrolyte, the steps of which are as follows:

[0038] (1) Preparation of cobalt tetraoxide / carbon cloth positive electrode: the carbon cloth was washed with acetone and deionized water in an ultrasonic cleaner for 30 min before use, and then fully dried in a constant temperature drying oven for use. Cobalt tetroxide slurry is made of 9mg of cobalt tetroxide powder and 21mg of carbon black, to which 2.4mL of deionized water, 0.6mL of isopropanol and 0.3mL of Put the perfluororesin solution in the ultrasonic cleaner for 30 minutes and take it out for use. The prepared cobalt tetroxide slurry was coated dropwise on carbon cloth with a pipette gun and dried at room temperature with a loading capacity of 0.3 mg cm –2 .

[0039](2) Preparation of flexible polymer electrolyte: First, weigh a certain amount (equivalent to 5wt.% polyvinyl alcohol) of nano-silica powder with a p...

Embodiment 2

[0044] This embodiment relates to a method for preparing a flexible zinc-air battery based on a polymer electrolyte, the steps of which are as follows:

[0045] (1) Preparation of cobalt tetraoxide / carbon cloth positive electrode: the carbon cloth was washed with acetone and deionized water in an ultrasonic cleaner for 30 min before use, and then fully dried in a constant temperature drying oven for use. Cobalt tetroxide slurry is made of 8.5mg of cobalt tetroxide powder and 20.5mg of carbon black, to which 2.3mL of deionized water, 0.55mL of isopropanol and 0.25mL of Put the perfluororesin solution in the ultrasonic cleaner for 40 minutes and take it out for use. The prepared cobalt tetroxide slurry was coated dropwise on carbon cloth with a pipette gun and dried at room temperature with a loading capacity of 0.25 mg cm -2 .

[0046] (2) Preparation of flexible polymer electrolyte: First, weigh a certain amount (equivalent to 1wt.% polyacrylic acid) of nano-silica powder w...

Embodiment 3

[0051] This embodiment relates to a method for preparing a flexible zinc-air battery based on a polymer electrolyte, the steps of which are as follows:

[0052] (1) Preparation of cobalt tetraoxide / carbon cloth positive electrode: the carbon cloth was washed with acetone and deionized water in an ultrasonic cleaner for 30 min before use, and then fully dried in a constant temperature drying oven for use. Cobalt tetroxide slurry is made of 9.5mg of cobalt tetroxide powder and 21.5mg of carbon black, to which 2.5mL of deionized water, 0.65mL of isopropanol and 0.35mL of Put the perfluororesin solution in the ultrasonic cleaner for 35 minutes and take it out for use. The prepared cobalt tetroxide slurry was coated dropwise on carbon cloth with a pipette gun and dried at room temperature, and its loading capacity was 0.35 mg cm -2 .

[0053] (2) Preparation of flexible polymer electrolyte: First, weigh a certain amount (equivalent to 9wt.% polyvinyl alcohol) of nano-silica powd...

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Abstract

The invention discloses a flexible zinc-air battery based on a polymer electrolyte. The flexible zinc-air battery uses polyvinyl alcohol or polyacrylic acid as a polymer skeleton of a semi-solid electrolyte, uses polyethylene glycol as a pore-forming agent to make the polymer matrix appear in a pore-shaped structure, introduces nano silica into the whole system as a crosslinking agent, a water retaining agent and a plasticizer, and immerses the prepared polymer system in a high concentration potassium hydroxide aqueous solution for a certain period of time to obtain a porous nano silica composite polymer electrolyte. The polymer electrolyte has the characteristics such as high ionic conductivity, high water retention property and excellent flexibility, and the assembled zinc-air battery has the comparative advantages of long cycle stability, high power and energy density and good flexibility by placing the prepared polymer electrolyte between the zinc sheet electrode and the catalyst-coated carbon cloth electrode, which provides theoretical basis and technical support for the practical application of flexible zinc-air batteries.

Description

technical field [0001] The invention belongs to the technical field of flexible energy devices, and in particular relates to a preparation method of a polymer electrolyte-based flexible zinc-air battery. Background technique [0002] Flexible and portable electronic devices can meet some special requirements due to their light weight, ultra-thin, small size, bendable, stretchable, wearable, foldable, twistable, rollable, and even weavable. Demand has become a development trend in the current electronic age. In order to adapt to the development of flexible and portable electronic devices, it is necessary to develop flexible and portable energy storage devices that provide energy for them. Among them, the zinc-air battery is an important metal-air battery with a theoretical specific energy density of 1086Wh kg -1 , about 3-5 times higher than current lithium-ion batteries. Moreover, metal zinc is low in cost, non-toxic, non-flammable, and has good environmental friendliness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06B82Y30/00
CPCY02E60/10
Inventor 钟澄范夏月刘杰韩晓鹏邓意达胡文彬
Owner TIANJIN UNIV
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