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

Preparation method and application of modified polysiloxane solid polymer electrolyte membrane

A solid electrolyte membrane and polysiloxane-based technology, which is applied in the direction of solid electrolyte, electrolyte battery manufacturing, non-aqueous electrolyte, etc., can solve the problems of narrow electrochemical window and low ion conductivity, and achieve good mobility and low glass Transformation temperature, the effect of reducing the crystallization region

Active Publication Date: 2018-11-13
ZHEJIANG UNIV
View PDF3 Cites 11 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 problems of low ionic conductivity and narrow electrochemical window at room temperature in existing all-solid polymer electrolytes

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 and application of modified polysiloxane solid polymer electrolyte membrane
  • Preparation method and application of modified polysiloxane solid polymer electrolyte membrane
  • Preparation method and application of modified polysiloxane solid polymer electrolyte membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1P

[0026] The synthesis of implementation example 1PEO modified PMHS

[0027] A certain amount of PMHS was weighed and mixed with an appropriate amount of anhydrous toluene into a 50ml three-necked flask, and then placed in an oil bath and heated and stirred. Appropriate amount of PEO(m (PEO) :m (PHMS) =2), an appropriate amount of chloroplatinic acid catalyst was dissolved and mixed in anhydrous toluene, and then slowly added into a three-necked flask. in N 2 Under a protective atmosphere, the mixed solution was first reacted at 50°C for 2-4 hours, and then heated to 80°C to react until the carbon-carbon double bond in the mixed solution disappeared (infrared verification), and the product was washed with n-hexane to remove impurities, and then distilled under reduced pressure The solvent was removed to obtain a PEO-grafted PMHS backbone polymer (P-PMHS).

Embodiment 2

[0028] The preparation of implementation example 2 polymer lithium ion batteries

[0029] (1) Put the P-PMHS polymer prepared in Example 1 into a 100ml round bottom flask, add an appropriate amount of anhydrous acetonitrile solvent, and stir to dissolve. Subsequently, an appropriate amount of chloroplatinic acid catalyst, triethylene glycol divinyl ether crosslinking agent, bistrifluoromethylsulfonylimide lithium (adding lithium salt amount to meet [EO]:[Li + ]=20:1) into the round bottom flask, stirred at room temperature for 12h, and mixed well.

[0030] (2) Pour the mixed solution of (1) into a polytetrafluoroethylene mold, place it in a vacuum oven, heat and cross-link and solidify to obtain a solid polymer electrolyte membrane, and transfer it to a glove box for standby.

[0031] (3) LiFePO 4 The positive electrode material, PVDF, and conductive carbon black are mixed according to the mass ratio of 80:10:10, and an appropriate amount of NMP is added to stir evenly, and ...

Embodiment 3

[0033] The preparation of implementation example 3 polymer lithium ion batteries

[0034] (1) Weigh a certain amount of PMHS and mix them with an appropriate amount of anhydrous toluene and add them into a 50ml three-neck flask, then heat and stir in an oil bath. Appropriate amount of PEO(m (PEO) :m (PHMS)=2), cyanoimidazolium ionic liquid (10wt% PMHS) and an appropriate amount of chloroplatinic acid catalyst were dissolved in anhydrous toluene and mixed, then slowly added into a three-necked flask. in N 2 Under a protective atmosphere, the mixed solution was first reacted at 50°C for 2-4 hours, and then heated to 80°C to react until the carbon-carbon double bond in the mixed solution disappeared (infrared verification), and the product was washed with n-hexane to remove impurities, and then distilled under reduced pressure Removal of solvent yielded IL-CN and PEO double-grafted PMHS polymer (PIN-PMHS).

[0035] (2) Put the PIN-PMHS polymer prepared in (1) in a 100ml round...

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
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method and application of modified polysiloxane solid polymer electrolyte membrane (SPE). The SPE is prepared from poly(methylhydrosiloxane) (PMHS), nitrile imidazole ionic liquid (IL-CN), allyl terminated polyether (PEO), lithium salt and a cross-linking agent. The preparation method comprises the following steps: 1, sufficiently mixing the PMHS, PEO and IL-CN in anhydrous toluene, adding a chloroplatinic acid catalyst, and performing reaction for a certain period of time at certain temperature; 2, mixing an appropriate amount of the lithium salt, the cross-linking agent and a catalyst into a product in the step 1 in anhydrous acetonitrile, sufficiently stirring, pouring a solution into a polytetrafluoroethylene die, and performing heating, cross-linking and solidifying in a vacuum drying oven, so as to obtain the all-solid-state polymer polymer electrolyte membrane. An obtained electrolyte has high conductivity, wide electrochemical stability window and high stability, and can be applied to lithium secondary batteries.

Description

technical field [0001] The invention relates to a preparation method and application of a modified polysiloxane-based solid electrolyte membrane. Background technique [0002] With the advancement of science and technology, people have entered the digital information age, and portable smart digital products are developing rapidly. Correspondingly, energy storage has become a very important scientific and technological topic. The emergence and development of lithium-ion batteries not only solve the energy storage problem of mobile digital devices to a large extent, but also promote the industrial development of digital products. For example, smartphones, laptops, audio equipment, game consoles, digital cameras, PDAs, etc. On the other hand, oil resources are depleting day by day, automobile exhaust has increasingly significant impact on the ecological environment, and people's awareness of environmental protection is constantly increasing. This makes lithium-ion secondary ...

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): H01M10/058H01M10/0565C08G77/46
CPCC08G77/46H01M10/0565H01M10/058H01M2300/0082Y02E60/10Y02P70/50
Inventor 张庆华刘明珠詹晓力陈丰秋
Owner ZHEJIANG UNIV
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