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Gel type perspex/organic leituo stone electrolyte and prepn. process

A technology of polymethyl methacrylate and rectorite, which is applied in the field of gel-type polymethyl methacrylate/organic rectorite electrolyte and its preparation, can solve problems such as not obvious effect, and achieve good size space The effect of stability, wide applicability and simple operation process

Inactive Publication Date: 2006-09-20
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have limitations, or the effect is not very obvious

Method used

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  • Gel type perspex/organic leituo stone electrolyte and prepn. process
  • Gel type perspex/organic leituo stone electrolyte and prepn. process

Examples

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preparation example Construction

[0018] The preparation of organic rectorite: 50g of sodium-based rectorite is dissolved in water and stirred for slurrying, and 30g of organic surfactant C 12 (or C 16 、C 18 ) quaternary ammonium salt dissolved in water at 40-50°C, then slowly pour the aqueous surfactant solution into the slurry, homogeneously disperse for 10 minutes, then transfer to a three-necked flask, and keep warm at 80-85°C for 12 hours. transferred to a beaker, and then washed with deionized water until AgNO 3 The solution does not detect Cl - So far, organic rectorite 12-OREC, 16-OREC and 18-OREC can be obtained after drying and grinding.

[0019] Preparation of gel-type polymethyl methacrylate / organic rectorite electrolyte: lithium perchlorate LiCiO 4 Dissolve in propylene carbonate PC to form an organic solution. Dissolving the prepared polymethyl methacrylate and modified organic rectorite in Li + In the salt solution, stir at 50-60°C until homogeneous. Then pour the gel solution onto a glas...

Embodiment 1

[0020] Implementation example 1: lithium perchlorate LiCiO 4 Dissolve in propylene carbonate PC to make 1M·L -1 20g self-made polymethyl methacrylate and 2g self-made organically modified rectorite (12-OREC) were dissolved in 80g of prepared PC organic solution at about 55°C with stirring until it became uniform phase colloid, and then pour the gel solution on a glass plate to form a film, and place it in a desiccator at room temperature for 12 hours to obtain a gel-type PMMA / 2phr-12-OREC electrolyte. It is found that under this ratio, the prepared polymethyl methacrylate / organic rectorite electrolyte has good steric stability and mechanical properties, and well meets the requirements for ion conductivity as an electrolyte for lithium-ion batteries .

Embodiment 2

[0021] Implementation example 2: lithium perchlorate LiCiO 4 Dissolve in propylene carbonate PC to make 1M·L -1 20g self-made polymethyl methacrylate and 5g self-made organically modified rectorite (12-OREC) were dissolved in 80g prepared PC organic solution at about 55°C with stirring until it became uniform phase colloid, and then pour the gel solution on a glass plate to form a film, and place it in a desiccator at room temperature for 12 hours to obtain a gel-type PMMA / 5phr-12-OREC electrolyte. It is found that under this ratio, the prepared polymethyl methacrylate / organic rectorite electrolyte has good steric stability and mechanical properties, and well meets the requirements for ion conductivity as an electrolyte for lithium-ion batteries .

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Abstract

This invention relates to a kind of gel-type poly (methyl methacrylate) / organic rectorite electrolyte and its preparation method. It has the technique characteristics that poly (methyl methacrylate), organic rectorite and 1mol / L propylene carbonate solution of LiClO4 are adopted as raw materials. The preparation method is that, LiClO4 is dissolved in propylene carbonate (PC) to form 1mol / L organic solution of LiClO4. The prepared poly (methyl methacrylate) and modified rectorite are dissolved in the solution, and the mixture is stirred to homogeneity at a temperature of 55 deg. C and cooled to obtain the electrolyte mentioned above. This invention has the advantages of good ion conductivity of the electrolyte system and stereo, chemical and electrochemical stability. The technique is simple to achieve even in common laboratories and thus it is a simple, direct, environmentally friendly and practical method to prepare gel electrolyte.

Description

technical field [0001] The invention relates to a gel-type polymethyl methacrylate / organic rectorite electrolyte and a preparation method thereof. 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 under the premise of achieving the required ionic conductivity. Electrolyte materials are divided into three types: organic liquid electrolytes, all-solid electrolytes, and gel polymer electrolytes. Liquid electrolytes provide the best ionic conductivity, but the use of organic liquid electrolysis raises some safety concerns, such as the release of toxic or flammable vapors. Volatility of liquid electrolytes is also an important issue, requiring larger areas of the battery to withstand changes in vapor pressure with greater load and energy. Additionally, using a liquid electrolyte necessitates the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08K3/34
Inventor 马晓燕黄韵梁国正陈芳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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