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Method for preparing zwitter-ion hydrogel electrolyte

A zwitterion, hydrogel technology, applied in the direction of hybrid capacitor electrolyte, etc., can solve the problem of not greatly improving the electrochemical performance.

Pending Publication Date: 2022-03-11
XINJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these hydrogel electrolytes provide a physical framework to support ion transport, they do not substantially improve electrochemical performance

Method used

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  • Method for preparing zwitter-ion hydrogel electrolyte
  • Method for preparing zwitter-ion hydrogel electrolyte
  • Method for preparing zwitter-ion hydrogel electrolyte

Examples

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Embodiment 1

[0017] At room temperature, weigh 0.1 g of carboxymethyl cellulose and disperse it in 8 mL of deionized water at 60 °C, stir evenly, add 2 mL of acrylic acid, 1 g of [2-(methacryloyloxy)ethyl]dimethyl-( 3-Sulphonic acid propyl) ammonium hydroxide, after stirring evenly, add 0.016 g of N,N-dimethylbisacrylamide and 0.04 g of ammonium persulfate, and after it forms a uniform solution, conduct thermal initiation at a constant temperature of 60 °C Polymerization reaction, after immersing the synthesized hydrogel in a zinc trifluoromethanesulfonate solution for 1 h, a CMC-P (MAEDS-co-AA) polymer hydrogel electrolyte was obtained.

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Abstract

The invention discloses a synthetic method of CMC-P (MAEDS-co-AA) polymer zwitter-ion hydrogel and a preparation method of the polymer zwitter-ion hydrogel. The preparation method comprises the following steps: taking carboxymethyl cellulose, acrylic acid and [2-(methylacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide as raw materials, dissolving, and carrying out thermal polymerization to synthesize the hydrogel electrolyte. After the hydrogel electrolyte is soaked in a zinc trifluoromethanesulfonate solution for one hour, the hydrogel electrolyte has the excellent ionic conductivity of 25.3 mS cm < 1 >. The obtained hydrogel electrolyte is assembled into a quasi-solid-state zinc ion hybrid capacitor for electrochemical performance testing, the current density is 0.25-20 A g <-1 > during testing, and the voltage range is 0.2-1.8 V. The preparation method is simple and convenient, the microstructure of the synthetic material is of a porous structure, and the assembled quasi-solid zinc ion hybrid capacitor shows excellent specific capacity and rate capability.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage materials, and in particular relates to a method for synthesizing a hydrogel electrolyte by radical polymerization and its application in a zinc-ion hybrid capacitor. Background technique [0002] The development of high-efficiency energy storage devices has greatly met the increasing energy demand in our daily life, among which supercapacitors have become high-performance energy storage devices with the advantages of long operating life and high power density. Zinc-ion hybrid supercapacitors (ZHSCs), consisting of a capacitive carbon cathode, a battery-type Zn anode, and a specific Zn-ion electrolyte, are considered to be a promising candidate due to their ability to fill the gap between supercapacitors and secondary batteries. Candidates for energy storage devices. In recent years, gel electrolytes have been able to play the role of electrolyte, separator and binder in quasi-solid ...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L51/02C08F251/02C08F220/06C08F220/38H01G11/56
CPCC08J3/075C08F251/02H01G11/56C08J2351/02C08F220/06C08F220/387Y02E60/13
Inventor 米红宇朱小青杨聪聪季辰辰
Owner XINJIANG UNIVERSITY
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