阅读说明：本技术 一种凝胶基纽扣式锌-空气电池 (Gel-based button type zinc-air battery ) 是由 王克亮 张鹏飞 魏满晖 左亚宇 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种凝胶基纽扣式锌-空气电池。将丙烯酰胺单体、醚类聚合物以及氧化石墨烯以一定的比例均匀混合,在恒温箱中聚合制备成凝胶状物质；将强碱性固体颗粒溶解在适量的去离子水中配置强碱性电解液。将聚合形成的凝胶聚合物在强碱性电解液中浸泡获得凝胶聚合物电解质。将锌箔、凝胶聚合物电解质和空气电极组装成三层结构,然后封装于金属外壳中组装成纽扣式锌-空气电池。通过在丙烯酰胺中加入醚类聚合物和氧化石墨烯,优化了凝胶电解质的性能；此外凝胶电解质的使用改善了传统纽扣电池电解质泄露以及金属外壳易腐蚀的弊端,提高了电池的充放电性能和循环稳定性。本发明结构简单,制备方便,在纽扣电池领域很有发展潜力。(The invention discloses a gel-based button type zinc-air battery. Uniformly mixing an acrylamide monomer, an ether polymer and graphene oxide according to a certain proportion, and polymerizing in a thermostat to prepare a gel substance; and dissolving the strong-alkaline solid particles in a proper amount of deionized water to prepare strong-alkaline electrolyte. And soaking the gel polymer formed by polymerization in a strong alkaline electrolyte to obtain the gel polymer electrolyte. The zinc foil, the gel polymer electrolyte and the air electrode are assembled into a three-layer structure, and then the three-layer structure is packaged in a metal shell to assemble the button type zinc-air battery. The performance of the gel electrolyte is optimized by adding the ether polymer and the graphene oxide into the acrylamide; in addition, the defects of electrolyte leakage and easy corrosion of a metal shell of the traditional button cell are overcome by using the gel electrolyte, and the charge and discharge performance and the cycling stability of the cell are improved. The button cell is simple in structure, convenient to prepare and very high in development potential in the field of button cells.)

1. A gel-based button type zinc-air battery comprises the following steps:

1) dropwise adding a certain graphene oxide solution into deionized water, and uniformly stirring by using a stirrer to prepare a graphene oxide aqueous solution;

2) adding a proper amount of triblock ether polymer particles into an aqueous solution of graphene oxide, and completely dissolving the triblock ether polymer particles under the action of a stirrer;

3) adding an acrylamide monomer into the solution prepared in the step 2), stirring until the acrylamide monomer is completely dissolved, and then adding methylene bisacrylamide by using ammonium persulfate as an initiator to prepare a uniform mixed solution;

4) pouring the mixed solution prepared in the step 3) into a mould, and then putting the mould into a thermostat for polymerization to obtain a gel polymer;

5) weighing strong-alkaline solid particles and zinc-containing compounds with certain mass, and dissolving in a proper amount of deionized water to prepare an alkaline solution with the hydroxide concentration of 6mol/L and the zinc ion concentration of 0.5 mol/L;

6) soaking the obtained gel polymer in an alkaline solution with the hydroxide concentration of 6mol/L and the zinc ion concentration of 0.5mol/L to prepare a gel polymer electrolyte;

7) preparing a zinc electrode: cutting the zinc foil into a wafer-shaped structure, and polishing the surface to be smooth by using abrasive paper;

8) preparing an air electrode: selecting an air electrode of a non-noble metal catalyst, and cutting the air electrode into a wafer-shaped structure;

9) cutting the gel polymer electrolyte prepared by the soaking method into a wafer shape with the same size as the zinc electrode and the air battery;

10) and (3) clamping the gel polymer electrolyte between the zinc electrode and the air electrode to assemble a sandwich type structure, and packaging the sandwich type structure in a metal shell to obtain the button type zinc-air battery.

2. The gel-based button-type zinc-air battery of claim 1, wherein: in the process of preparing the gel polymer, the polymerization temperature in the incubator is 50 ℃ and the polymerization time is 4 h.

3. The gel-based button-type zinc-air battery of claim 1, wherein: the strongly basic solid electrolyte includes one of potassium hydroxide, sodium hydroxide and other strong alkaline electrolytes.

4. The gel-based button-type zinc-air battery of claim 1, wherein: the electrolyte is a strong alkaline solution with the concentration of hydroxide radical of 6mol/L and the concentration of zinc ion of 0.5 mol/L.

5. The gel-based button-type zinc-air battery of claim 1, wherein: the sizes of the zinc electrode, the gel polymer electrolyte, the air electrode and the metal shell are matched with each other, so that the sandwich-type battery can be packaged in the metal shell.

6. The gel-based button-type zinc-air battery of claim 1, wherein: according to the working characteristics of the zinc-air battery, the lower shell of the button shell must be provided with a plurality of air holes.

7. The gel-based button-type zinc-air battery of claim 1, wherein: in the process of packaging the battery, the air electrode must be arranged at one side of the metal shell with the air holes so as to ensure the normal operation of the battery.

Technical Field

The invention belongs to the field of energy utilization of metal-air batteries, and particularly relates to a gel-based button type zinc-air battery.

Background

Under the background that the national development and social progress generate new challenges for global energy requirements, the energy demand rises, fossil energy is exhausted, and world pollution is aggravated, the country carries out national policies of saving resources and protecting the environment, the transformation and innovation of energy become new development directions, and the development of green, environment-friendly and sustainable clean energy becomes a new trend, so that the development of a battery energy storage technology is driven.

Although the traditional battery is mature in technology, the traditional battery is high in cost, has a very serious pollution problem particularly, and does not meet the development requirement of energy conservation and emission reduction in the current times, so that a road for transferring the traditional battery to a new energy environment-friendly battery is determined. The metal-air battery is a very popular research field nowadays, is a special type of fuel cell, and is one of the most distinctive representatives of the new generation of green batteries. The metal-air battery has the advantages of low cost, no toxicity and environmental protection, has higher theoretical specific energy and specific power, is a high-performance emerging green battery system, and has great development potential and application prospect in the future.

The button type zinc-air battery has small volume, light weight, stable performance during low-current discharge and longer service life, and can meet the requirements of small-current and low-power electric equipment. However, the development of this type of battery has still had the following disadvantages:

(1) the traditional button type zinc-air battery is a disposable battery without charging performance, and the electrolyte material in the traditional button type zinc-air battery is usually high-concentration strong alkaline mixed liquid and has strong corrosivity.

(2) There is a risk of electrolyte leakage, which, once electrolyte leaks, rapidly corrodes the battery components, causing irreparable damage, resulting in a drastic deterioration or even failure of the battery performance.

The above factors greatly limit the development and practical application of button zinc-air batteries.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a gel-based button type zinc-air battery, which avoids the defects of electrolyte leakage and easy corrosion of a metal shell and simultaneously improves the structure and the performance of the button type zinc-air battery.

In order to achieve the purpose of the invention, the following technical scheme is provided.

A gel-based button type zinc-air battery comprises the following steps:

1) dropwise adding a certain graphene oxide solution into deionized water, and uniformly stirring by using a stirrer to prepare a graphene oxide aqueous solution;

2) adding a proper amount of triblock ether polymer particles into an aqueous solution of graphene oxide, and completely dissolving the triblock ether polymer particles under the action of a stirrer;

3) adding an acrylamide monomer into the solution prepared in the step 2), stirring until the acrylamide monomer is completely dissolved, and then adding methylene bisacrylamide by using ammonium persulfate as an initiator to prepare a uniform mixed solution;

4) pouring the mixed solution prepared in the step 3) into a mould, and then putting the mould into a thermostat for polymerization to obtain a gel polymer;

5) weighing strong-alkaline solid particles and zinc-containing compounds with certain mass, and dissolving in a proper amount of deionized water to prepare an alkaline solution with the hydroxide concentration of 6mol/L and the zinc ion concentration of 0.5 mol/L;

6) soaking the obtained gel polymer in an alkaline solution with the hydroxide concentration of 6mol/L and the zinc ion concentration of 0.5mol/L to prepare a gel polymer electrolyte;

7) preparing a zinc electrode: cutting the zinc foil into a wafer-shaped structure, and polishing the surface to be smooth by using abrasive paper;

8) preparing an air electrode: selecting an air electrode of a non-noble metal catalyst, and cutting the air electrode into a wafer-shaped structure;

9) cutting the gel polymer electrolyte prepared by the soaking method into a wafer shape with the same size as the zinc electrode and the air battery;

10) and (3) clamping the gel polymer electrolyte between the zinc electrode and the air electrode to assemble a sandwich type structure, and packaging the sandwich type structure in a metal shell to obtain the button type zinc-air battery.

In the process of preparing the gel polymer, the polymerization temperature in the incubator is 50 ℃ and the polymerization time is 4 h.

The strongly basic solid electrolyte includes one of potassium hydroxide, sodium hydroxide and other strong alkaline electrolytes.

The electrolyte is a strong alkaline solution with the concentration of hydroxide radical of 6mol/L and the concentration of zinc ion of 0.5 mol/L.

The sizes of the zinc electrode, the gel polymer electrolyte, the air electrode and the metal shell are matched with each other, so that the sandwich-type battery can be packaged in the metal shell.

According to the working characteristics of the zinc-air battery, the lower shell of the button shell must be provided with a plurality of air holes.

In the process of packaging the battery, the air electrode must be arranged at one side of the metal shell with the air holes so as to ensure the normal operation of the battery.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention enables the zinc-air battery to have the capability of continuous charge and discharge and realizes the recycling.

(2) The invention takes the gel polymer as the electrolyte of the button zinc-air battery, effectively solves the problems of electrolyte leakage and the like to a certain extent, and improves the battery performance.

(3) The gel polymer electrolyte of the present invention exhibits not only excellent electrochemical characteristics but also good environmental suitability.

Drawings

Fig. 1 is a cross-sectional view of a gel-based button zinc-air cell of the present invention.

Fig. 2 is a structural composition diagram of the gel-based button-type zinc-air battery of the present invention.

Fig. 3 is a charge-discharge cycle curve for a gel-based button zinc-air battery of the present invention.

In the figure: 1. the button cell comprises a button cell upper cover, 2. zinc foil, 3. gel polymer electrolyte, 4. a catalyst layer, 5. an air electrode, 6. a button cell lower shell, 7. the button cell upper cover, 8. zinc foil, 9. gel polymer electrolyte, 10. an air electrode loaded with catalyst, 11. a button cell lower shell and 12. an air hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 2, 3, fig. 1 is a cross-sectional view of a gel-based button zinc-air battery of the present invention; FIG. 2 is a structural component view of a gel-based button zinc-air cell of the present invention; fig. 3 is a charge-discharge cycle curve for a gel-based button zinc-air battery of the present invention.

As shown in fig. 1, a cross-sectional view of a gel-based button-type zinc-air battery is structurally characterized in that: the zinc foil, the gel polymer electrolyte and the air electrode are sequentially overlapped to form a tightly contacted sandwich type structure, and the button shell is wrapped outside.

As shown in fig. 2, a structural composition diagram of a gel-based button-type zinc-air battery is characterized in that: the button cell comprises a button cell upper cover, zinc foil, gel polymer electrolyte, an air electrode of a non-noble metal catalyst and a button cell lower shell with air holes.

As shown in fig. 3, the charge-discharge cycle curve of a gel-based button zinc-air cell. The gel-based button type zinc-air battery shows good cycling stability in the charging and discharging processes.

In the examples of the present invention, the surface area of the cell was 2.5cm²(ii) a The strongly alkaline solution was prepared by dissolving 10.08g of solid particles of potassium hydroxide (KOH) and 1.215g of zinc oxide (ZnO) in 30ml of deionized water.

In the examples of the present invention, the contents of the prepared gel polymer were: 0.5g of ether polymer F127, 10ml of graphene oxide, 3g of acrylamide monomer, 0.03g of ammonium persulfate, 0.01g of methylene bisacrylamide and 30ml of deionized water; the prepared gel polymer is soaked in a strong alkaline solution for 12 hours to prepare the gel polymer electrolyte.

In the embodiment of the invention, the gel-based button type zinc-air battery shows good charge and discharge performance at 2mA/cm²The current density of the battery can be charged and discharged for more than 30 hours in a circulating way; two gel-based button zinc-air batteries are connected in series to enable the small bulb to normally emit light.

The above embodiments are merely exemplary, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made on the basis of the principle of the present invention shall fall within the protection scope of the present invention.