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Method for preparing three-dimensional porous polymer electrolyte film

A three-dimensional porous, electrolyte membrane technology, applied in the field of electrochemistry, can solve the problems of harsh template removal conditions, complex procedures, environmental pollution, etc., and achieve excellent cycle stability, uniform pore size distribution, and simple and easy preparation methods

Inactive Publication Date: 2014-01-29
XIANGTAN UNIV
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Problems solved by technology

Solve the problems of inconvenient operation, complex process, harsh conditions for template removal, and environmental pollution in the existing template method

Method used

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  • Method for preparing three-dimensional porous polymer electrolyte film

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0029] (1) Configure 0.2 mol / L CaCl 2 solution and 0.2 mol / L Na 2 CO 3 Each solution is 50ml. Add 0.8422g oleic acid, 180ml ethanol and Na 2 CO 3 Solution, under rapid stirring, slowly drop CaCl 2 Solution, continue to react for 2-3 hours after dripping, the precipitate (CaCO 3 Nanoparticles) after suction filtration, washing with water and alcohol, place and dry naturally for use.

[0030] (2) In a 100ml round bottom flask filled with 50ml ethanol and 10ml distilled water, add 6 grams of CaCO obtained in step (1) 3 Nanoparticles, stir quickly, heat up to 50 ° C, and then slowly add the equivalent of CaCO 3 3% titanate coupling agent TC-114, continue to stir for 4 hours, cool, centrifuge, wash with distilled water, wash with ethanol, and dry naturally to obtain m...

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Abstract

The invention provides a method for preparing a three-dimensional porous polymer electrolyte film. The method comprises the following steps of synthesizing sodium carbonate and calcium chloride in water to form nanometer CaCO3 by using an oleic acid and ethanol as dispersing agents; modifying the nanometer CaCO3 by using a titanate coupling agent to synthesize modified nanometer CaCO3; ultrasonically dispersing the modified nanometer CaCO3 into a first organic solvent, adding and dissolving polymer powder to obtain a polymer solution in which the modified nanometer CaCO3 is suspended, casting the polymer solution on the surface of a smooth substrate after room-temperature vacuum defoaming, and drying the substrate at constant temperature to form a polymer film; impregnating the polymer film in an aqueous solution of HCl until no foams are formed, washing the polymer film for many times by using distilled water until the pH is 7, and performing vacuum drying to obtain a three-dimensional porous polymer film; and impregnating the three-dimensional porous polymer film in a liquid electrolyte solution in a water-free and oxygen-free glove box to obtain the three-dimensional porous polymer electrolyte film. The method has the advantages of simplicity, easiness, environmental friendliness and the like, and porosity, aperture distribution and the like in the polymer electrolyte film are easy to control.

Description

technical field [0001] The invention relates to a preparation method of a porous polymer electrolyte membrane, which belongs to the field of electrochemistry. Background technique [0002] Polymer lithium-ion batteries have been widely used as chemical power sources for portable electronic devices such as mobile phones, laptop computers, and digital cameras. Due to its better safety performance than liquid lithium-ion batteries, polymer lithium-ion batteries can be used in large-scale equipment such as electric vehicles in the future. The ionic conductivity of polymer electrolytes is generally lower than that of liquid electrolytes, and its electrochemical performance becomes a key factor affecting the charge-discharge performance and cycle performance of polymer lithium-ion batteries. [0003] Due to the large amount of microporous structure, the porous polymer electrolyte absorbs a large amount of electrolyte solution, generally with 10 -3 The room temperature ionic cond...

Claims

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Application Information

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IPC IPC(8): H01M10/056
CPCB82Y40/00H01M10/0525H01M10/0565Y02E60/10
Inventor 李朝晖刘红烟刘玲玲肖启振雷钢铁
Owner XIANGTAN UNIV
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