Gel polymer electrolytes and preparation method thereof

A gel polymer, electrolyte technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as low conductivity, achieve excellent electrical properties, good dimensional stability, good chemical and electrochemical stability Effect

Inactive Publication Date: 2008-06-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its non-volatility, low toxicity, and high energy density available, solid polymer electrolyte systems typically have the required mechanical properties and are practically easy to process into any shape or size. Inherently lower conductivity due to larger restricted motion of polymer molecules

Method used

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  • Gel polymer electrolytes and preparation method thereof
  • Gel polymer electrolytes and preparation method thereof
  • Gel polymer electrolytes and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1:. Lithium perchlorate LiClO 4 Dissolve in propylene carbonate PC to make an organic solution with a concentration of 1mol / L, then dissolve 30g of the prepared graft polymer in 70g of PC lithium salt solution, stir until homogeneous at about 55°C, and then A film was formed along the flow on a glass plate and placed in a desiccator for 12 hours to obtain a gel polymer electrolyte GPE-30.

Embodiment 2

[0036] Embodiment 2: lithium perchlorate LiClO is dissolved in propylene carbonate PC, is made into the organic solution that concentration is 1mol / L, then the 40g graft polymer that prepares is dissolved in 60gPC lithium salt solution, at about 55 ℃ Under the condition of stirring until homogeneous, then the film was formed along the flow on the glass plate, and placed in a desiccator for 12 hours to obtain the gel polymer electrolyte GPE-40.

Embodiment 3

[0037] Embodiment 3: lithium perchlorate LiClO Dissolve in propylene carbonate PC, be made into the organic solution that concentration is 1mol / L, then the 50g graft polymer that prepares is dissolved in 50gPC lithium salt solution, at about 55 ℃ Under the condition of stirring until homogeneous, then the film was formed along the flow on the glass plate, and placed in a desiccator for 12 hours to obtain the gel polymer electrolyte GPE-50.

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Abstract

The present invention relates to a gel polymer electrolyte and the preparation method. The technical characteristics are that the proportion of the electrolyte is that the weight percentage of grafting polymer matrix is 30 to 60wt. percents and liquid electrolyte is 40 to 70wt. percents; the liquid electrolyte takes propylene carbonate ester (PC) as plasticizing agent and lithium perchlorate (LiClO4) is lithium salt organic solution with 1.0mol/L concentration. The synthetic recipe of thegrafting polymer includes 1.0mol of propylene type copolymer, 2.0mol of polyethylene monomethyl ether and 500ml of methanol. The components of the propylene type copolymer include 17g to 19g of methacrylate methyl ester, 16g to 18g of maleic anhydride, 350mL to 360mL of solvent and 0.0036g to 0.0040g of initiator; wherein, the mol ratio of methacrylate methyl ester and maleic anhydride is 1:1 to 1:1.5. The gel polymer electrolyte has the beneficial effects of high ion electric conductivity, good electrochemical stability, excellent electric performance and good size and space stability. The synthetic process is simple and workable.

Description

technical field [0001] The invention relates to a gel polymer electrolyte and a preparation method thereof, which is a gel polymer electrolyte prepared with a grafted polymer as a matrix. Background technique [0002] Electrolyte is one of the components of lithium-ion batteries. The focus of current research is to improve the dimensional stability, chemical stability and electrochemical stability of the electrolyte on the premise of achieving the required ionic conductivity. Electrolyte materials are divided into three types: organic liquid electrolytes, all-solid electrolytes, and condensed polymer electrolytes. Liquid electrolytes provide the best ionic conductivity, but there are some issues, such as the release of toxic or flammable gases, requiring greater usage loads and more energy-intensive cell areas to withstand changes in gas pressure. Due to its non-volatility, low toxicity, and high energy density available, solid polymer electrolyte systems typically have the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08J3/075H01M10/40H01M10/02
CPCY02E60/122Y02E60/10
Inventor 马晓燕黄韵梁国正王书会
Owner NORTHWESTERN POLYTECHNICAL UNIV
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