Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lithium ion battery gel type ionic liquid/polymer electrolyte and preparation method thereof

A lithium-ion battery and ionic liquid technology, which is applied in the field of gel-type ionic liquid/polymer electrolyte and its preparation, can solve the problems of poor compatibility of negative electrode materials, and achieve the effects of good compatibility, low toxicity, and flexible packaging

Inactive Publication Date: 2010-01-27
HARBIN INST OF TECH
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor compatibility between current imidazole ionic liquids and lithium-ion battery negative electrode materials; and provide a lithium-ion battery gel-type ionic liquid / polymer electrolyte and a preparation method thereof

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
  • Lithium ion battery gel type ionic liquid/polymer electrolyte and preparation method thereof
  • Lithium ion battery gel type ionic liquid/polymer electrolyte and preparation method thereof
  • Lithium ion battery gel type ionic liquid/polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Specific embodiment one: In this embodiment, the gel-type ionic liquid / polymer electrolyte of the lithium-ion battery is made of a high molecular polymer, an imidazole ionic liquid and a lithium salt, wherein the mass ratio of the high molecular polymer to the imidazole ionic liquid is 1:1-2, the mass ratio of imidazole ionic liquid to lithium salt is 0.01-6:1.

[0011] The ion conductivity of the electrolyte of the present embodiment is high, as high as 0.53×10 -3 S / m, good thermal stability and wide electrochemical stability window, it can be used in lithium-ion batteries with high capacity, and can also eliminate the safety hazards of liquid lithium-ion batteries to a large extent, and realize the battery's all-solid structure and residual liquid Minimal, encapsulating the purpose of flexibility. The electrolyte of the present embodiment has good compatibility with the lithium titanate negative electrode, and the lithium-ion battery manufactured with it has a first ...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass ratio of the high molecular polymer to the imidazole-based ionic liquid is 1:1.2-1.8. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass ratio of the polymer to the imidazole ionic liquid is 1:1.5. Others are the same as in the first 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
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium ion battery gel type ionic liquid / polymer electrolyte and a preparation method thereof, relating to a gel type ionic liquid / polymer electrolyte and a preparation method thereof. The invention solves the problem of poor compatibility of the prior imidazole ionic liquid and a lithium ion battery cathode material. The electrolyte is made of a macromoleclar polymer, imidazole ionic liquid and lithium salt. The method comprises the following steps: 1. dissolving the macromoleclar polymer into organic solvent; 2. adding the imidazole ionic liquid and stirring till the solution is uniform; 3. adding the lithium salt to obtain gel liquid; 4. pouring the gel liquid into a die, drying in vacuum and demolding. The electrolyte has favorable compatibility with a lithium titanate cathode; a lithium ion battery made of the electrolyte has high safety, and the lithium titanate cathode presents ultrahigh specific capacity (more than a double of the theoretical specific capacity) and two charging and discharging platforms in the electrolyte. The invention has simple method and technology, low cost and convenient operation.

Description

technical field [0001] The invention relates to a gel-type ionic liquid / polymer electrolyte and a preparation method thereof. Background technique [0002] Ionic liquids (also known as room temperature molten salts, RTIL for short) have the advantages of good electrical conductivity, low vapor pressure, non-flammability, large heat capacity, wide electrochemical window and less self-discharge, and are used as a new green alternative to volatile organic solvents. Solvents have attracted widespread attention. In recent years, it can be used as a gel electrolyte for lithium-ion batteries, and it also shows good prospects in eliminating the safety hazards of lithium-ion batteries. However, the outstanding problem of gel-type ionic liquid / polymer electrolyte used in lithium-ion batteries is the low ion conductivity, usually less than 10 -3 S / m order of magnitude, and the compatibility between ionic liquid and electrode material is not good, it is difficult for electrode materia...

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): H01M10/40H01M10/38
Inventor 安茂忠崔闻宇杨培霞张锦秋
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com