Novel single ion polymer electrolyte and preparation method and application thereof

A polymer and single-ion technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as reducing battery energy efficiency and service life, reducing battery charge and discharge current stability, and limiting the application of polymer electrolytes, etc., to achieve Improved heat resistance, strong electrochemical stability, easy to grasp and control effects

Active Publication Date: 2018-05-29
XIAMEN UNIV
View PDF11 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional polymer electrolytes are dual-ion electrolytes that conduct both cations and anions at the same time, and the migration number of lithium ions is relatively low, only between 0.2 and 0.5, and some are even less than 0.1, which greatly limits the application of polymer electrolytes.
Because most electrochemical devices involve the problem of DC polarization, during the charging and discharging process, anions will gather at the electrode / electrolyte interface, concentration polarization occurs, and a polarization voltage opposite to the applied electric field is generated. It hinders the migration of ions, reduces the stability of battery charge and discharge current, and reduces the energy efficiency and service life 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
  • Novel single ion polymer electrolyte and preparation method and application thereof
  • Novel single ion polymer electrolyte and preparation method and application thereof
  • Novel single ion polymer electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) 1 g of base powder polyvinylidene fluoride (PVDF) powder was vacuum-dried and hermetically sealed, then put into an irradiation bottle, and irradiated with a dose of 100 kGy in a cobalt source chamber.

[0044] (2) Dissolve the pre-irradiated powder in 30mL (N,N-dimethylformamide) DMF solvent, add 5mmol of hexafluorobutyl methacrylate and 2-acrylamide-2 to the uniformly dissolved base solution - 5 mmol of methylpropanesulfonic acid, after the oxygen in the solution was pumped out by a double row pipe, under the protection of an inert gas, the reaction was carried out in a constant temperature oil bath at 60° C. for 48 hours to obtain a double graft polymer solution. The solution was purified by adding excess precipitant ethanol and water several times, and the precipitated powder obtained was dried in a vacuum oven for 24 hours. Then the dry powder was completely dissolved in N,N-dimethylformamide (DMF), cast into a film and then dried for 24 hours.

[0045] (3) Tr...

Embodiment 2

[0061] (1) 1 g of base powder polyvinylidene fluoride (PVDF) powder was vacuum-dried and hermetically sealed, then put into an irradiation bottle, and irradiated with a dose of 100 kGy in a cobalt source chamber.

[0062] (2) Dissolve 1 g of the pre-irradiated powder in 30 mL of DMF solvent, add 5 mmol of 2-acrylamide-2-methylpropanesulfonic acid to the uniformly dissolved base solution, and remove the oxygen in the solution with a double row tube, Under the protection of gas, the constant temperature oil bath is 60°C. After a certain period of reaction, the deionized water is purified several times, and the obtained precipitated powder is vacuum-dried for 24 hours and stored in a sealed tube. Put the powder stored in the sealed tube into the cobalt source chamber and irradiate again. Dissolve the irradiated powder again with a solution evenly, then put 5 mmol of hexafluorobutyl methacrylate into it, remove oxygen, and react in an inert gas-protected constant temperature oil b...

Embodiment 3

[0065] (1) Dissolve 1g of base powder vinylidene fluoride (PVDF) powder, 5mmol of hexafluorobutyl methacrylate and 5mmol of 2-acrylamide-2-methylpropanesulfonic acid in 30mL of DMSO solvent, and put it into Irradiation chamber.

[0066] (2) Precipitate the irradiated solution several times with precipitant methanol and deionized water, and dissolve the obtained precipitated powder in the organic solvent DMF again after drying. Cast into film.

[0067] (3) Soak the obtained film in 1mol / L LiOH solution for 48 hours.

[0068] The results show that, compared with Examples 1 and 2, different radiation and feeding sequences have a great influence on the grafting rate.

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
decomposition temperatureaaaaaaaaaa
Login to view more

Abstract

The invention discloses a novel single ion polymer electrolyte and a preparation method and an application of the novel single ion polymer electrolyte. A radiation grafting method is used to synchronously graft two functional monomers on a powder substrate, wherein one monomer is a fluorine-containing monomer, and the other grafted monomer is a monomer comprising a lithium salt ion pair. The powder substrate is selected, the proportion of the monomers is regulated through the radiation grafting method without adding an initiator or a catalyst, and an evenly grafted pure double-monomer graftingmembrane is conveniently obtained. The grafting membrane is applied to a lithium ion battery, the lithium salt is not additionally added, only a small quantity of plasticizer is needed, and the grafting membrane has a prominent electrochemical performance. Meanwhile, the grafting membrane has the advantages of heat stability, size stability and mechanical property. The method is novel and effective, is simple, is low in cost and strong in operability, and is quite suitable for commercial production.

Description

technical field [0001] The invention relates to a novel single-ion polymer electrolyte, in particular to a preparation method and application of a novel single-ion polymer electrolyte. Background technique [0002] Lithium-ion batteries have achieved great success in the field of energy storage due to their high operating voltage, wide operating temperature range, and long cycle life. Security risks. Polymer electrolytes have the potential to solve the corresponding safety problems, and are expected to become the next generation of electrolyte materials with high safety. Using polymer electrolyte, it can be used not only as battery electrolyte, but also as a separator in traditional batteries. While solving potential safety hazards, it also facilitates commercial production, and battery production is easier to design and process. In the prior art, polymer electrolytes are prepared by adding lithium salts to matrix materials, and then physically and chemically cross-linkin...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525C08F259/08C08F220/24C08F220/58C08F255/02C08F212/08
CPCC08F255/02C08F259/08H01M10/0525H01M10/0565C08F220/585Y02E60/10
Inventor 赵金保丁妍张鹏
Owner XIAMEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap