Preparation method of polymer electrolyte taking cellulose as additive

A polymer and electrolyte technology, applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve the problems of low conductivity of polyvinylidene fluoride, and achieve easy preparation, good electrochemical performance, and improved performance. Effect

Active Publication Date: 2020-08-04
HARBIN UNIV OF SCI & TECH
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low conductivity of polyvinylidene fluoride at room temperature, and provide a preparation method of polymer electrolyte with cellulose as an additive

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
  • Preparation method of polymer electrolyte taking cellulose as additive
  • Preparation method of polymer electrolyte taking cellulose as additive
  • Preparation method of polymer electrolyte taking cellulose as additive

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0034] Specific Example 1: A method for preparing a polymer electrolyte with cellulose as an additive in this embodiment:

[0035] 1. Pre-treatment of materials

[0036] Pre-treat all materials except lithium salts and liquid materials to ensure that the materials are sufficiently dry before use.

[0037] 2. Preparation of cellulose solution

[0038] Dissolve a certain amount of polyvinylidene fluoride and hydroxypropyl methylcellulose in N,N dimethylformamide, heat in a water bath for a certain period of time to fully mix the two;

[0039] 3. Preparation of casting solution

[0040] Take a certain quality of polystyrene and dissolve it in toluene. After the polystyrene is completely dissolved, add the cellulose solution in step 2 and add a corresponding quality of diluent. After stirring for 12 hours, add lithium bistrifluoromethanesulfonimide, Continue to stir for 6h to make the solution evenly dispersed;

[0041] 4. Preparation of Polymer Electrolyte

[0042] Cast the ...

specific Embodiment approach 2

[0053] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the pretreatment method described in step 1 is drying at 80° C. for 3 hours in a blast drying oven. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0054] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the temperature of the water bath heating described in step 2 is 60° C., and the heating time is 30 minutes. Others are the same as in the first or second embodiment.

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
Conductivityaaaaaaaaaa
Conductivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a polymer electrolyte taking cellulose as an additive, and relates to a preparation method of a polymer electrolyte membrane of a lithium-ion battery. Aliquid electrolyte is not used such that the use safety of a battery is improved. The preparation method comprises the following steps: 1, treating a material before use; 2, dissolving polyvinylidenefluoride and hydroxypropyl methyl cellulose into N, N-dimethylformamide fibers to prepare a cellulose solution; 3, preparing a membrane casting solution of the electrolyte by a blending method; and 4, casting the membrane casting solution into a membrane to prepare the polymer electrolyte. The polymer electrolyte is prepared by using a blending method and a casting method, and the method is simple to operate, easy to prepare, high in safety and high in controllability. The method is applied to the field of lithium-ion batteries.

Description

【Technical field】 [0001] The invention relates to a method for preparing a lithium ion battery polymer electrolyte membrane. 【Background technique】 [0002] Polyvinylidene fluoride has a strong electron-withdrawing group -C-F, and is an ideal material for preparing electrolytes that are widely used. It only dissolves or swells in a few chemicals such as strong bases, ketones, and oleum. In addition, polyvinylidene fluoride has a high dielectric constant and a low glass transition temperature, which is beneficial to the dissociation of lithium salts. Therefore, polyvinylidene fluoride is a more suitable material for the preparation of polymer electrolytes in lithium-ion batteries. However, the structure of polyvinylidene fluoride is relatively regular, and the high crystallinity leads to the limitation of ion transmission, so it needs to be modified. [0003] Natural polymers are polymer substances that exist in living organisms, and can be roughly divided into three categ...

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): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0085Y02E60/10
Inventor 李丽波杜金田
Owner HARBIN UNIV OF SCI & TECH
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