CN-121736214-B - Preparation method of porous organic polymer and application of porous organic polymer in water-based zinc ion battery

Abstract

The invention relates to the technical field of organic polymers, in particular to a preparation method of a novel porous organic polymer and application of the novel porous organic polymer in a water system zinc ion battery, comprising the following preparation steps of S1, mixing 3, 3-diamino- [1, 1-biphenyl ] -4, 4-diol and p-toluenesulfonic acid in a mortar, adding deionized water, and uniformly mixing; S2, adding 1.57-1.6 parts of 2,4, 6-trimethyl phloroglucinol, continuously grinding to obtain white gray powder, and S3, heating the white gray powder under a closed condition, washing and drying to obtain the novel porous organic polymer. The zinc ion battery prepared by the novel porous organic polymer has high specific capacity and cycle retention rate, reduced internal resistance of the battery, weakened polarization phenomenon and improved ionic conductivity. Meanwhile, the raw materials used in the invention have wide sources and low price, and the preparation process does not need toxic solvents, accords with the green chemistry concept, and has good industrialization prospect.

Inventors

• SUN XUEJIAO
• TIAN ZHONGZHEN
• LI DONGMEI

Assignees

• 内蒙古科技大学

Dates

Publication Date

20260508

Application Date

20260228

Claims (2)

1. 1. The application of the porous organic polymer in the aqueous zinc ion battery is characterized in that the porous organic polymer comprises the following preparation steps: S1, mixing 0.9-1.1 parts of 3, 3-diamino- [1, 1-biphenyl ] -4, 4-diol and 6.2-6.6 parts of p-toluenesulfonic acid in a mortar according to parts by weight, adding 0.5-0.7 part of deionized water, and uniformly mixing; S2, adding 1.57-1.6 parts of 2,4, 6-trimethyl phloroglucinol into the product obtained in the step S1, and continuously grinding for 50-60min to obtain white gray powder; S3, heating the white and gray powder obtained in the step S2 under a closed condition, washing, and drying for 10-12 hours to obtain a porous organic polymer; In the step S3, heating is carried out at 88-92 ℃ for 22-24 hours; In the step S3, washing is carried out for 3 to 4 times according to the sequence of deionized water, N-dimethylacetamide and acetone.
2. 2. Use of the porous organic polymer according to claim 1 in an aqueous zinc ion battery, wherein the drying temperature in step S3 is 58-62 ℃.

Description

Preparation method of porous organic polymer and application of porous organic polymer in water-based zinc ion battery Technical Field The invention relates to the technical field of organic polymers, in particular to a preparation method of a novel porous organic polymer and application of the novel porous organic polymer in a water-based zinc ion battery. Background The water-based zinc ion battery (AZIBs) has the advantages of high theoretical capacity, high safety, low cost, environmental friendliness and the like, and has wide application prospect in the field of large-scale energy storage. However, zinc dendrite growth, corrosion passivation and other problems easily occur in the charge and discharge process of the zinc cathode, and the cycle life and safety of the battery are seriously affected. The separator acts as a key component for ion transport and electronic isolation inside the battery, and its performance directly affects the overall performance of the battery. At present, glass Fiber (GF) separators widely used in water-based zinc ion batteries have good chemical stability and ion conductivity, but have low mechanical strength, are difficult to effectively inhibit puncture of zinc dendrites, and are easy to cause short circuit of the batteries. In addition, the conventional GF membrane lacks the capability of regulating the transmission of Zn 2+, so that an ion concentration gradient is easily formed near the cathode, and the occurrence of dendrite growth and side reactions (such as hydrogen evolution reaction) are aggravated. Although the GF separator has been studied to be modified by coating graphene, carbonitride, etc., these methods have problems of complicated preparation process, high cost, poor compatibility with an electrolyte, etc. The Porous Organic Polymer (POPs) has the advantages of adjustable pore structure, large specific surface area, rich functional groups, good thermal stability and chemical stability, and the like, and has good application potential in the fields of energy storage and conversion. However, the research on modifying porous organic polymers for aqueous zinc ion battery separator membranes is insufficient at present, and especially there is a lack of a POPs-based composite separator membrane which has the advantages of simple process, low cost and mass preparation, so as to cooperatively improve the mechanical strength, ion conductivity, electrolyte wettability and dendrite inhibition capability of the separator membrane. Therefore, the development of a novel porous organic polymer and an application method thereof in a diaphragm has important significance for promoting the development of a water-based zinc ion battery to the high performance, long service life and high safety direction. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a preparation method of a novel porous organic polymer and application of the novel porous organic polymer in a water-based zinc ion battery. In order to achieve the above purpose, the present invention provides the following technical solutions: the preparation method of the novel porous organic polymer comprises the following preparation steps: S1, mixing 0.9-1.1 parts of 3, 3-diamino- [1, 1-biphenyl ] -4, 4-diol and 6.2-6.6 parts of p-toluenesulfonic acid in a mortar according to parts by weight, adding 0.5-0.7 part of deionized water, and uniformly mixing; S2, adding 1.57-1.6 parts of 2,4, 6-trimethyl phloroglucinol into the product obtained in the step S1, and continuously grinding for 50-60min to obtain white gray powder; s3, heating the white and gray powder obtained in the step S2 under a closed condition, washing, and drying for 10-12 hours to obtain the novel porous organic polymer. Preferably, the heating in step S3 is carried out at 88-92 ℃ for 22-24 hours. Preferably, in the step S3, the washing is performed for 3 to 4 times according to the sequence of deionized water, N-dimethylacetamide and acetone. Preferably, the drying temperature in step S3 is 58-62 ℃. The novel porous organic polymer prepared by the preparation method is applied to a water-based zinc ion battery. Compared with the prior art, the invention has the beneficial effects that: 1. The porous organic polymer prepared by the invention has rich mesoporous structure, high specific surface area and good thermal stability, and is favorable for electrolyte infiltration and ion rapid transmission. The porous organic polymer is coated on the surface of the glass fiber diaphragm, so that the puncture resistance of the prepared composite diaphragm is remarkably improved, zinc dendrite puncture can be effectively inhibited, the contact angle is close to 0 ℃, the electrolyte infiltration speed is high, interface resistance is reduced, the ion transmission efficiency is improved, and the service life of the diaphragm is prolonged. 2. The zinc ion battery prepared by the novel porous organic polymer has high specific