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Solid polymer electrolyte and preparation method thereof

A solid polymer and electrolyte technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problems of low conductivity of electrolytes and poor mechanical properties of polymer electrolytes, achieve low glass transition temperature, promote migration, improve The effect of ionic conductivity

Active Publication Date: 2016-09-07
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the matrix used to prepare polymer electrolytes is mostly polyethylene oxide (PEO), but the conductivity of the prepared electrolyte is low, and the mechanical properties of the prepared polymer electrolyte are poor.

Method used

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  • Solid polymer electrolyte and preparation method thereof
  • Solid polymer electrolyte and preparation method thereof
  • Solid polymer electrolyte and preparation method thereof

Examples

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preparation example Construction

[0037] The preparation method of above-mentioned solid polymer electrolyte, comprises the steps:

[0038] Provide the following components by weight: 1 part of nitrile rubber, 0.02-0.8 parts of octa(polyethylene glycol)-cage polysilsesquioxane, 0.1-3 parts of lithium salt; also provide a solvent for dissolving nitrile rubber , wherein every 1g of nitrile rubber corresponds to 15ml-25ml of solvent, nitrile rubber is added to the solvent, and stirred at normal temperature until the nitrile rubber is completely dissolved to obtain a nitrile rubber solution; lithium salt is added to the above nitrile rubber solution, Continue to stir until the lithium salt is completely dissolved to obtain a primary mixed solution; add octa(polyethylene glycol)-cage polysilsesquioxane dropwise to the above primary mixed solution, and stir until dissolved to obtain a secondary mixed solution. The solvent of the secondary mixed solution was volatilized in a vacuum oven to a constant weight to obtain...

Embodiment 1

[0045] The solid polymer electrolyte described in the present embodiment comprises the following components by weight: 0.5g of nitrile rubber, 0.05g of octa(polyethylene glycol)-cage polysilsesquioxane, 0.25g of lithium perchlorate . Wherein, the mass fraction of acrylonitrile in the nitrile rubber is 25%. Provide 10ml of solvent tetrahydrofuran for dissolving nitrile rubber, add nitrile rubber in the tetrahydrofuran solvent, stir until the nitrile rubber is completely dissolved at normal temperature, and obtain the nitrile rubber solution; add lithium perchlorate in the above-mentioned nitrile rubber solution, Continue to stir until the lithium perchlorate is completely dissolved to obtain a primary mixed solution; add octa(polyethylene glycol)-cage polysilsesquioxane dropwise to the above primary mixed solution, and stir until dissolved to obtain a secondary mixed solution. The above-mentioned secondary mixed solution is poured into a polytetrafluoroethylene mold, and the p...

Embodiment 2

[0051] The solid polymer electrolyte described in the present embodiment comprises the following components by weight: 0.5g of nitrile rubber, 0.1g of octa(polyethylene glycol)-cage polysilsesquioxane, 0.25g of lithium perchlorate . Wherein, the mass fraction of acrylonitrile in the nitrile rubber is 30%. Provide 10ml of solvent tetrahydrofuran for dissolving nitrile rubber, add nitrile rubber in the tetrahydrofuran solvent, stir until the nitrile rubber is completely dissolved at normal temperature, and obtain the nitrile rubber solution; add lithium perchlorate in the above-mentioned nitrile rubber solution, Continue to stir until the lithium perchlorate is completely dissolved to obtain a primary mixed solution; add octa(polyethylene glycol)-cage polysilsesquioxane dropwise to the above primary mixed solution and stir until dissolved to obtain a secondary mixed solution. The above-mentioned secondary mixed solution is poured into a polytetrafluoroethylene mold, and the pol...

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Abstract

The present invention discloses a solid polymer electrolyte and a preparation method thereof. The electrolyte includes the following components in parts by weight: 1 part of nitrile rubber, 0.02-0.8 part of octa-(polyethylene glycol)-polyhedral oligomericsilsesquioxane, and 0.1-3 parts of lithium salt. The preparation method includes the steps of providing a solvent dissolving the nitrile rubber, wherein every 1g of nitrile rubber is corresponding to 15ml-25ml solvent; adding the nitrile rubber into the solvent, and stirring at normal temperature till totally dissolving the nitrile rubber, so as to obtain a nitrile rubber solution; adding the lithium salt into the nitrile rubber solution, continuing to stir at normal temperature till totally dissolving the lithium salt, so as to obtain a primary mixed solution; dropping the octa-(polyethylene glycol)-polyhedral oligomericsilsesquioxane into the primary mixed solution, stirring till dissolving, so as to obtain a secondary mixed solution; and volatilizing the solvent in the secondary mixed solution in a vacuum oven till obtaining a constant weight, so as to obtain the solid polymer electrolyte. The solid polymer electrolyte has high conductivity and good mechanical performance.

Description

technical field [0001] The invention relates to the technical field of polymer electrolytes, in particular to solid polymer electrolytes and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the characteristics of high working voltage, high energy density, high energy efficiency, long cycle life, low self-discharge rate, low pollution, no memory effect, and good safety. They are widely used in mobile phones, cameras, and small drones. , laptops and other portable devices, and pure electric new energy vehicles. Traditional lithium-ion batteries mostly use organic solvents such as propylene carbonate (PC), dimethyl carbonate (DMC), and diethyl carbonate (DEC) as electrolytes. These electrolytes are volatile, flammable, and have potential safety hazards due to leakage. It even explodes under extreme conditions. [0003] To solve these problems, attempts have been made to develop a solid polymer electrolyte to replace the conventional elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M2300/0082Y02E60/10
Inventor 杨树颜
Owner DONGGUAN UNIV OF TECH
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