Phosphorus-containing crosslinked gel polymer electrolyte and on-site thermal-polymerization preparation method and application thereof

A cross-linked gel and electrolyte technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of low mechanical strength, high operating conditions, assembly and use requirements, etc., and achieve good electrochemical stability , high ionic conductivity, and the effect of a simple preparation method

Inactive Publication Date: 2014-05-07
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in general, there are few varieties of gel polymer electrolyte systems currently developed, and each has some problems, such as room temperature ionic conductivity is still difficult to meet high-power charging and discharging conditions, and mechanical s

Method used

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  • Phosphorus-containing crosslinked gel polymer electrolyte and on-site thermal-polymerization preparation method and application thereof
  • Phosphorus-containing crosslinked gel polymer electrolyte and on-site thermal-polymerization preparation method and application thereof
  • Phosphorus-containing crosslinked gel polymer electrolyte and on-site thermal-polymerization preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1: Corresponding preparation of general formula IV

[0037] Allyl diethyl phosphate (general formula I) 1.0 g, triethylene glycol dimethacrylate 0.7 g, AIBN 0.0075 g, liquid electrolyte for lithium ion batteries (the electrolyte is lithium hexafluorophosphate, the concentration is 1M, and the solvent is ethylene carbonate Ester and diethyl carbonate (1:1, v%)) 8.3 g, mixed uniformly, reacted at 75 ℃ for 1 h under the protection of nitrogen, to obtain a transparent, uniform, and soft gel polymer electrolyte at 25 ℃ The measured conductivity is 6.95 ms / cm.

[0038]

Example Embodiment

[0039] Example 2: Corresponding preparation of general formula IV

[0040] 2-acryloxyethyl diethyl phosphate (general formula II) 1.0 g, triethylene glycol diacrylate 0.5 g, AIBN 0.0075 g, liquid electrolyte for lithium ion batteries (the electrolyte is lithium hexafluorophosphate, the concentration is 1M, the solvent It is 8.5 g of ethylene carbonate and dimethyl carbonate (1:1, v%), mixed evenly, and reacted at 75 ℃ for 1 h under nitrogen protection to obtain a transparent, uniform, viscous, elastic, and good mechanical property Gel polymer electrolyte has a conductivity of 7.86 ms / cm measured at 25°C.

[0041]

Example Embodiment

[0042] Example 3: Corresponding preparation of general formula IV

[0043] Diethyl butenylphosphonate (general formula III) 1.0 g, triethylene glycol dimethacrylate 0.5 g, AIBN 0.0075 g, liquid electrolyte for lithium ion batteries (the electrolyte is lithium hexafluorophosphate, the concentration is 1M, the solvent is carbonic acid Vinyl ester and dimethyl carbonate (1:1, v%)) 8.5 g, mixed uniformly, and reacted at 75 ℃ for 1 h under nitrogen protection to obtain a transparent, uniform gel polymer electrolyte with good mechanical properties. The conductivity measured at ℃ is 8.58 ms / cm.

[0044]

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Abstract

The invention belongs to the technical field of gel polymer electrolytes and particularly discloses a phosphorus-containing crosslinked gel polymer electrolyte and an on-site thermal-polymerization preparation method and application thereof. The preparation method comprises the steps of preparing the following raw materials, of which the total weight percent is 100%: 5-15% of polymerization monomers, 3-10% of crosslinker, 0.01-1.0% of thermal initiator and 75-90% of lithium-ion battery liquid electrolyte, uniformly mixing, and then, reacting for 20-100 minutes at the temperature of 75-150 DEG C under the protection of inert gas, thereby obtaining the phosphorus-containing crosslinked gel polymer electrolyte. The invention further discloses application of the phosphorus-containing crosslinked gel polymer electrolyte in the preparation of solid lithium-ion batteries. The invention provides novel phosphates and/or phosphonates, containing double bonds, which serve as monomers of the gel polymer electrolyte, and the phosphorus-containing crosslinked gel polymer electrolyte designed and synthesized from the monomers has the advantages of simple and convenient preparation method, high ionic conductivity, high thermal stability and good electrochemical stability, so that phosphorus-containing crosslinked gel polymer electrolytes with relatively good stability are provided for the practical application of the solid lithium-ion batteries and high-power lithium-ion batteries.

Description

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Claims

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Application Information

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Owner ZHENGZHOU UNIV
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