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High-conductivity polymer electrolyte and preparation method thereof

A high-conductivity, polymer technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve problems such as limited applications, low ionic conductivity, no conductivity, electrochemical stability and interface stability, and achieve Simple preparation method, high room temperature conductivity, good electrochemical and interface stability

Inactive Publication Date: 2017-09-22
HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these polymers have certain disadvantages. For example, although polyoxyethylene and polyoxypropylene can be used as all-solid polymer electrolytes, their low ionic conductivity limits their applications.
It can be said that there is currently no polymer electrolyte with satisfactory performance in terms of conductivity, electrochemical stability, and interfacial stability.

Method used

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  • High-conductivity polymer electrolyte and preparation method thereof
  • High-conductivity polymer electrolyte and preparation method thereof
  • High-conductivity polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 2.7g polyvinyl carbonate and 100g N-methylpyrrolidone into a 250 ml reagent bottle and stir at room temperature for 6 h to obtain a uniform solution, add 1.8g lithium bistrifluoromethanesulfonimide to the above solution, and stir at room temperature After 6 h, add 0.5g of polyvinylidene fluoride after complete dissolution, stir to obtain a uniform mixed solution, inject the mixed solution into a polytetrafluoroethylene (PTFE) mold to dry to form a film, and vacuum dry to obtain a solid polymer electrolyte membrane .

Embodiment 2

[0028] Add 0.5 g of polyvinyl carbonate and 100 g of dimethyl sulfite to a 250 ml reagent bottle and stir at room temperature for 6 h to obtain a uniform solution. Add 4.5 g of lithium bisfluorosulfonyl imide to the above solution and stir at room temperature for 6 h. h, after complete dissolution, add 1.25g poly(vinylidene fluoride-hexafluoropropylene), stir to obtain a uniform mixed solution, pour the mixed solution into a polytetrafluoroethylene (PTFE) mold to dry to form a film, and vacuum dry to obtain Solid polymer electrolyte membrane.

Embodiment 3

[0030] Add 3g of polypropylene carbonate and 100g of acetonitrile into a 100ml reagent bottle and stir at room temperature for 6 hours to obtain a homogeneous solution. Add 3g of lithium perchlorate to the above solution and stir for 6 hours at room temperature. After completely dissolving, add 6g of polyethylene Alcohol, stirring to obtain a uniform mixed solution, injecting the mixed solution into a polytetrafluoroethylene (PTFE) mold to dry to form a film, and vacuum drying to obtain a solid polymer electrolyte membrane.

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Abstract

The invention discloses a high-conductivity polymer electrolyte and a preparation method thereof. The polymer electrolyte is formed by mixing polycarbonate dissolved with a lithium salt and a substrate polymer, wherein the polycarbonate dissolved with a lithium salt is used as a substrate, the substrate is a conductive constituent, and the substrate polymer is a support body. The polymer electrolyte is simple to prepare and is high in conductivity under a room temperature.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a high-conductivity polymer electrolyte and a preparation method thereof. Background technique [0002] At present, the world is facing an energy crisis of depletion of traditional fossil energy sources and increasingly serious environmental problems. Therefore, it is imminent to develop new energy and establish an efficient, clean, economical and safe energy system. Due to the advantages of high energy density, long cycle life, no memory effect, and fast charging and discharging, lithium batteries have become irreplaceable excellent energy storage devices. Lithium batteries have developed very rapidly since they were officially commercialized by Sony in the early 1990s, and have become the most common mainstream energy storage devices in small digital electronic products such as mobile phones, notebook computers and digital cameras. However, the liquid electrolyte used in tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M2300/0082Y02E60/10
Inventor 白永平赵彦彪安茂忠陈国荣白杨李卫东席丹殷晓芬
Owner HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS
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