Unlock instant, AI-driven research and patent intelligence for your innovation.

A porous ionic conduction film used for a flow battery, and preparation and applications of the film

A technology for ion-conducting membranes and flow batteries, which is applied to porous ion-conducting membranes and its application in flow batteries, can solve the problems of reducing battery voltage efficiency and ion conductivity, and achieves the expansion of material selection and improvement Proton conductivity, the effect of simple preparation method

Active Publication Date: 2018-01-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smaller the pore size of the porous ion-conducting membrane, the higher the ion selectivity, but at the same time, due to the increase in the ion transport resistance, the ion conductivity of the membrane decreases, thereby reducing the voltage efficiency of the battery.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A porous ionic conduction film used for a flow battery, and preparation and applications of the film
  • A porous ionic conduction film used for a flow battery, and preparation and applications of the film
  • A porous ionic conduction film used for a flow battery, and preparation and applications of the film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 2.1 grams of sulfonated polyether ether ketone (wherein by 1 HNMR records that the sulfonation degree of the prepared sulfonated polyetheretherketone is 0.82) and 8.4 grams of polyethersulfone are dissolved in 19.5 grams of DMAc, stirred for 12 hours to form a uniform polymer solution, left to defoam, and scraped on After standing still for 20 seconds on a dust-free glass plate, put it into deionized water at room temperature. After the solvent is completely exchanged, the film thickness is 133±5 μm, and the porosity of the film matrix is ​​60%.

[0042]Soak the porous ion-conducting membrane prepared above into a 2%wt polydiallyldimethylammonium chloride aqueous solution, take it out after 10min, wash it with deionized water, and then soak it in a 2%wt aqueous solution of sulfonated graphene Take it out after 10 minutes and wash it with deionized water. Repeat the above process 3 times, and finally soak the porous ion-conducting membrane prepared above into 2%wt polyd...

Embodiment 2

[0045] The material characterization method and the base film preparation and characterization method are the same as in Example 1. The prepared porous ion-conducting membrane is soaked in the suspension of graphene oxide, taken out after 10 minutes, and washed with deionized water to obtain a graphene oxide self-assembled membrane. porous ion-conducting membrane.

[0046] Battery assembly and test conditions are the same as in Example 1, and in the charge and discharge experiment, the current density is 80mA / cm 2 , its coulombic efficiency is 95.5%, the voltage efficiency is 88.9%, and the energy efficiency is 84.9%.

Embodiment 3

[0048] 2.1 grams of quaternized chloromethyl polysulfone (wherein 1 HNMR records that the degree of quaternization of the prepared chloromethyl polysulfone is 0.78) and 8.4 grams of polyethersulfone are dissolved in 19.5 grams of DMAc, stirred for 12 hours, and a uniform polymer solution is formed. After being stirred into a uniform solution, static Put it in defoaming, scrape it on a dust-free glass plate, put it in deionized water at room temperature, the film thickness after complete curing is 140±3μm, and the porosity of the film matrix is ​​62%. Soak the porous ion-conducting membrane prepared above into a 2%wt sulfonated graphene solution, take it out after 10min, wash it with deionized water, and then soak it in an aqueous solution of 2%wt polydiallyldimethylammonium chloride Take it out after 10 minutes and wash it with deionized water. Repeat the above process to assemble a positively charged porous ion-conducting membrane of 3 layers of sulfonated graphene.

[0049...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Current densityaaaaaaaaaa
Coulombic efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to a porous ionic conduction film used for a flow battery. Organic polymer resin provided with positive or negative electric charges is adopted as a raw material to prepare a matrix of the porous ionic conduction film, or organic polymer resin free of charge performance and organic polymer resin provided with positive or negative electric charges are adopted as raw materialsto prepare a matrix of the porous ionic conduction film. Sulfonated graphene or graphene oxide is self-assemblied on the surface of the matrix. The porosity of the matrix is 40-80%. Through a layeredstructure of the graphene and surface functionalized functional groups, a vanadium ion barrier property and hydrogen ion conduction are achieved. The film has characteristics of high proton conductivity and good ion selectivity, and a preparing process is simple and prone to industrialization, and therefore a vanadium flow battery assembled by utilizing the film has a high energy efficiency and ion selectivity.

Description

technical field [0001] The invention relates to a porous ion conduction membrane for a flow battery, in particular to a graphene self-assembled porous ion conduction membrane and its application in a flow battery. Background technique [0002] With the continuous aggravation of environmental problems and the depletion of fossil energy, the development and utilization of renewable energy has attracted more and more attention. However, due to the discontinuous, unstable and uncontrollable characteristics of renewable energy, such as solar and wind energy, there is an urgent need for energy storage devices to regulate renewable energy to achieve a stable output of renewable energy. Among many energy storage technologies, flow batteries have attracted much attention due to their advantages such as high conversion efficiency, flexible system design, high storage capacity, freedom of site selection, deep charge and discharge, safety and environmental protection, and low maintenanc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M8/02H01M8/0245
CPCY02E60/50
Inventor 李先锋张华民赵于月袁治章
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI