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High-liquid absorbing rate micro-nano structure polymer electrolyte membrane and preparation method thereof

A technology of electrolyte membrane and micro-nano structure, which is applied in the direction of circuits, electrical components, secondary batteries, etc., can solve the problems of battery electrochemical performance degradation, high-performance advantages of batteries that cannot be realized, and limitations of industrial applications.

Inactive Publication Date: 2010-01-13
CHANGSHA HIGH TECH INDAL DEV ZONE CAISHENG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this type of polymer lithium-ion battery technology, although the addition of initiators and cross-linking agents can cure the battery, side reactions will also occur during charging and discharging, resulting in a decrease in the electrochemical performance of the battery or gas swelling failure. The advantages of high performance of ion batteries cannot be reflected, so the industrial application of this type of polymer lithium-ion batteries is limited

Method used

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  • High-liquid absorbing rate micro-nano structure polymer electrolyte membrane and preparation method thereof
  • High-liquid absorbing rate micro-nano structure polymer electrolyte membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Add 3g of polyvinylidene fluoride (PVDF) powder into 50g of acetone solution, and stir magnetically in a constant temperature water bath at 50°C for 1.5 hours to completely dissolve the polymer. Slowly add 3g of dioctyl adipate (DOA) solvent dropwise with a syringe, continue to stir the solution for 1 hour, transfer the solution into a special glass vessel, cut out a PP film of a certain size, immerse it in the solution, and seal it. Place the glassware in a vacuum oven at 60°C. After 5 minutes, when the membrane is completely infiltrated, open the vessel and lift the membrane vertically with tweezers, let the excess solution on the surface of the membrane flow down naturally under the action of gravity, volatilize the acetone, and dry it in the air. Polymer Electrolyte Membrane Primary Membrane. Soak the primary membrane in ether for 1 hour. After aerothermal treatment with a wind speed of 3m / s and a temperature of 50°C, a polymer electrolyte membrane with a micro-nan...

Embodiment 2

[0091] Add 3 g of polyvinylidene fluoride (PVDF) powder into 60 g of acetone solution, and stir magnetically in a constant temperature water bath at 50° C. for 1.5 hours to completely dissolve the polymer. Slowly add 3g of dioctyl adipate (DOA) solvent dropwise with a syringe, continue to stir the solution for 1 hour, transfer the solution into a special glass vessel, cut out a PP film of a certain size, immerse it in the solution, and seal it. Place the glassware in a vacuum oven at 60°C. After 5 minutes, when the membrane is completely infiltrated, open the vessel and lift the membrane vertically with tweezers, let the excess solution on the surface of the membrane flow down naturally under the action of gravity, volatilize the acetone, and dry it in the air. Polymer polymer electrolyte membrane primary membrane. Soak the primary membrane in ether for 1 hour. After aerothermal treatment with a wind speed of 3m / s and a temperature of 50°C, a polymer electrolyte membrane with...

Embodiment 3

[0094] Add 3 g of polyethylene glycol (PEG) powder into 70 g of acetone solution, and magnetically stir in a constant temperature water bath at 50° C. for 1.5 hours to completely dissolve the polymer. Slowly add 3g of dioctyl adipate (DOA) solvent dropwise with a syringe, continue to stir the solution for 1 hour, transfer the solution into a special glass vessel, cut out a PP film of a certain size, immerse it in the solution, and seal it. Place the glassware in a vacuum oven at 60°C. After 5 minutes, when the membrane is completely infiltrated, open the vessel and lift the membrane vertically with tweezers, let the excess solution on the surface of the membrane flow down naturally under the action of gravity, volatilize the acetone, and dry it in the air. Polymer polymer electrolyte membrane primary membrane. Soak the primary membrane in ether for 1 hour. After aerothermal treatment with a wind speed of 3m / s and a temperature of 50°C, a polymer electrolyte membrane with a mi...

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Abstract

The invention discloses a preparation method of a high-liquid absorbing rate micro-nano structure polymer electrolyte membrane, wherein the membrane is prepared by polymer material being packed on a support frame. The method comprises the following steps of: by being processed, the polymer membrane has a micro-nano structure, forms holes with micron level and nanometer level, and forms a netty distribution hole structure with the nanometer holes of the support frame; and the polymer which is crossly linked layer by layer is packed on the special support frame to form a special netty micro-nano structure polymer electrolyte membrane. The polymer membrane of the micro-nano structure can absorb large numbers of electrolyte, greatly increase liquid-absorption rate, and improve the affinity of diaphragm to the electrolyte; the netty micro-nano structure leads the electrolyte to be kept in the membrane well, leads lithium ion in the polymer electrolyte membrane to be evenly distributed, leads the concentration to be to balanced, and lead the current density in the battery to be evenly when discharging electricity; and the special support frame guarantees the mechanical capability of the membrane. The preparation technology of the polymer electrolyte membrane has simple route and easily obtained raw material, can be operated under a normal condition, and does not need harsh production environment. The polymer lithium ion battery prepared by the membrane has good electrochemistry capability.

Description

technical field [0001] The invention relates to a preparation method of a high liquid absorption rate micro-nano structure polymer electrolyte membrane Background technique [0002] Due to its excellent electrical performance, pollution-free, and good safety performance, the green secondary lithium-ion battery has developed rapidly and has become a hot spot in the research of new power supply technology in recent years. A common lithium-ion secondary battery consists of positive / negative electrode materials, electrolyte, separator, and battery casing packaging materials. The separator is an important part of the liquid lithium-ion secondary battery. It plays a role in preventing the short circuit of the positive / negative electrodes in the battery, and at the same time provides the ion transport channel during the charging and discharging process. Its performance determines the interface structure, internal resistance, etc. of the battery. , directly affects the capacity, cy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M10/38
Inventor 王太宏黄睿陈立宝周钢李秋红
Owner CHANGSHA HIGH TECH INDAL DEV ZONE CAISHENG NEW ENERGY TECH
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