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Organic inorganic composite polymer electrolyte and preparation method and application thereof

An inorganic composite, polymer technology, applied in the field of C, can solve the problems of ionic conductivity not meeting the requirements of the application, unsatisfactory mechanical properties, increased interface impedance, etc., to achieve good ionic conductivity and mechanical properties, and low cost. , the effect of inhibiting agglomeration

Inactive Publication Date: 2007-10-03
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ionic conductivity of general pure solid polymer electrolytes often cannot meet the application requirements. If plasticizers are added to form gel polymer electrolytes, their mechanical properties cannot meet the requirements.
At present, many researchers have mixed nano-oxide particles such as titanium dioxide and silicon dioxide into the gel polymer electrolyte (see: Fu Yanbao, Ma Xiaohua, Yang Qinghe, Xu Xingqi, Zong Xiangfu. Journal of Functional Polymers. 2002, 15:p221) to enhance the mechanical properties of the gel polymer electrolyte, the method of incorporation is basically limited to adding nanoparticles to the polymer solution with high molecular weight, because the nanoparticles have a high specific surface energy and are prone to agglomeration , resulting in an increase in interfacial impedance, thereby affecting ion conduction, and high molecular weight polymers also have the problem of high cost

Method used

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  • Organic inorganic composite polymer electrolyte and preparation method and application thereof
  • Organic inorganic composite polymer electrolyte and preparation method and application thereof
  • Organic inorganic composite polymer electrolyte and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Add 1 gram of nano-titanium dioxide and 0.0090 gram of sodium dodecylsulfonate into 100 milliliters of deionized water, and ultrasonically disperse for 4 hours. Under mechanical stirring, the temperature was raised to 80°C, 0.0456 g of sodium bisulfite and 0.0150 g of ammonium persulfate were added, and 1.5 g of methyl acrylate was slowly added. React for 1 hour, cool to room temperature and add 36 g of sodium chloride to break the emulsion. Centrifuge to obtain solid particles, and bake at 60°C until constant weight. Accompanying drawing 1 is the scanning electron micrograph of the modified nano titanium dioxide that this method obtains, and accompanying drawing 2 is the transmission electron micrograph of the modified nano titanium dioxide that this method obtains. Take 0.0900 grams of the above-mentioned nanoparticles, 2.205 grams of acrylonitrile, 2.205 grams of methyl acrylate and 0.0441 grams of azobisisobutyronitrile and join them in a 50-milliliter three-necked...

Embodiment 2

[0036] Add 1 gram of nano-titanium dioxide and 0.0090 gram of sodium dodecylsulfonate into 100 milliliters of deionized water, and ultrasonically disperse for 4 hours. Under mechanical stirring, the temperature was raised to 80°C, 0.0456 g of sodium bisulfite and 0.0150 g of ammonium persulfate were added, and 1.5 g of methyl acrylate was slowly added. React for 1 hour, cool to room temperature and add 36 g of sodium chloride to break the emulsion. Centrifuge to obtain solid particles, and bake at 60°C until constant weight. Take 0.1800 grams of the above-mentioned nanoparticles, 2.160 grams of acrylonitrile, 2.160 grams of methyl acrylate and 0.0432 grams of azobisisobutyronitrile and join them in a 50-milliliter three-necked bottle equipped with a nitrogen protection device, a reflux condenser, and a thermometer. After one hour, the temperature was raised to 60° C., stirred for 18 hours, 0.648 g of polyethylene glycol diacrylate and 0.0065 g of azobisisobutyronitrile were a...

Embodiment 3

[0038] Add 1 gram of nano-titanium dioxide and 0.0090 gram of sodium dodecylsulfonate into 100 milliliters of deionized water, and ultrasonically disperse for 4 hours. Under mechanical stirring, the temperature was raised to 80°C, 0.0456 g of sodium bisulfite and 0.0150 g of ammonium persulfate were added, and 1.5 g of methyl acrylate was slowly added. React for 1 hour, cool to room temperature and add 36 g of sodium chloride to break the emulsion. Centrifuge to obtain solid particles, and bake at 60°C until constant weight. Take 0.2700 grams of the above-mentioned nanoparticles, 2.115 grams of acrylonitrile, 2.115 grams of methyl acrylate and 0.0423 grams of azobisisobutyronitrile and join them in a 50-milliliter three-necked bottle equipped with a nitrogen protection device, a reflux condenser, and a thermometer. After one hour, the temperature was raised to 60° C., stirred for 18 hours, 0.6345 g of polyethylene glycol diacrylate and 0.0063 g of azobisisobutyronitrile were ...

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Abstract

This invention belongs to electrochemical techniques region, relates to the preparation method and application of a sort of organic inorganic compound polymer dielectric. The process includes: by emulsion polymerization, use polyacrylic acid methyl ester to carry out coverture modification hand ling to nanometer titanium dioxide particle; by solution polymerization method, carry out copolymerization of acrylonitrile and acrylonitrile methyl ester to modified nanometer titanium dioxide particle, obtain organic inorganic compound polymer. This compound polymer could as polymer dielectric stuff of lithium ion Secondary Battery, possess good ionic conductivity and mechanical property.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to an organic-inorganic composite polymer electrolyte and a preparation method thereof. More specifically, the invention relates to a nano-titanium dioxide coated and modified with polymethyl acrylate prepared by emulsion polymerization Particles, and then prepare the copolymer of methyl acrylate and acrylonitrile by adding the particles by solution in-situ polymerization. The invention also relates to the polymer electrolyte obtainable by the above method and its use. Background technique [0002] As we all know, lithium-ion secondary batteries have the characteristics of high energy density, high specific power, good cycle performance, no memory effect, and no pollution, but there are unsafe factors such as leakage. The solution is to use polymer electrolytes instead of liquid electrolytes (see: Wu Yuping, Dai Xiaobing, Ma Junqi, Cheng Yujiang. "Lithium Ion Ba...

Claims

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Application Information

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IPC IPC(8): C08F20/14C08F2/44C08F4/04C08F4/32C08K9/04C09C1/36C09C3/08H01M10/40H01M10/056
CPCY02E60/122Y02E60/10
Inventor 张鹏张汉平李朝晖吴宇平
Owner FUDAN UNIV
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