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All-solid polymer electrolyte membrane and preparation method thereof

An all-solid polymer and solid polymer technology, applied in circuits, fuel cells, electrical components, etc., can solve problems such as slow interaction and reaction, electrode materials are easily corroded, and affect battery life, and achieve a large electrochemical window , excellent mechanical properties and improved electrical conductivity

Inactive Publication Date: 2017-07-28
ZIBO TORCH ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Lithium-ion batteries containing liquid organic solvents, due to the slow interaction and reaction of liquid electrolytes with electrode materials and packaging materials, solvents tend to dry up, volatilize, and leak during long-term service, and electrode materials are easily corroded, affecting battery life
In addition, for lithium-ion rechargeable batteries using organic electrolyte, overcharging, internal short circuit and other abnormal conditions may cause the electrolyte to heat up, which may cause spontaneous combustion or explosion

Method used

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  • All-solid polymer electrolyte membrane and preparation method thereof
  • All-solid polymer electrolyte membrane and preparation method thereof
  • All-solid polymer electrolyte membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0062] A preparation method of an all-solid polymer electrolyte of plasticizer EC modified PEO matrix, comprising the following steps:

[0063] 1) (PEO) 9 LiPF 6 +15wt.%Al 2 o 3 Preparation of +30wt.% EC all-solid polymer electrolyte: In a glove box filled with argon, weigh 800mg PEO and dissolve it in 50ml DMF, weigh 34mg LiPF 6 , 120mgAl 2 o 3 and 240 mg EC were added to the mixture, and stirred at room temperature for 30 min. After the reactants were uniformly mixed, they were heated and stirred at a constant temperature of 40° C. for 5 h. A milky white transparent colloidal product was obtained, and the product was evenly coated on a PTFE plate, and dried under vacuum conditions at 90° C. for 48 hours to obtain a white all-solid-state electrolyte film with a smooth surface.

[0064] 2) Preparation of all-solid-state simulated battery: Cut the all-solid-state polymer electrolyte film prepared in step 1) into a size with a diameter of 19 mm, use stainless steel sheet (...

Embodiment 2

[0066] A preparation method of an all-solid polymer electrolyte of plasticizer EC modified PEO matrix, comprising the following steps:

[0067] 1) (PEO) 9 LiPF 6 +15wt.%Al 2 o 3 Preparation of +50wt.% EC all-solid polymer electrolyte: In a glove box filled with argon, weigh 800mg PEO and dissolve it in 50ml DMF, weigh 34mg LiPF 6 , 120mgAl 2 o 3 and 400mg EC were added to the mixed solution, and the steps were prepared according to the steps in Example 1 to obtain a white all-solid electrolyte film with a smooth surface.

[0068] 2) Preparation of all-solid-state simulated battery: Cut the all-solid-state polymer electrolyte film prepared in step 1) into a size with a diameter of 19 mm, use stainless steel sheet (SS) as an electrode, and assemble the solid-state electrolyte film into SS / electrolyte film / SS Symmetrically blocked cells.

Embodiment 3

[0070] A preparation method of an all-solid polymer electrolyte of plasticizer EC modified PEO matrix, comprising the following steps:

[0071] 1) (PEO) 9 LiPF 6 +15wt.%Al 2 o 3 Preparation of +70wt.% EC all-solid polymer electrolyte: In a glove box filled with argon, weigh 800mg PEO and dissolve it in 50ml DMF, weigh 34mg LiPF 6 , 120mgAl 2 o 3 and 480mg EC were added to the mixed solution, stirred at room temperature for 30 minutes, and prepared according to the steps in Example 1, the obtained all-solid electrolyte film had large voids on the surface.

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Abstract

The invention relates to an all-solid polymer electrolyte membrane and a preparation method thereof. The all-solid polymer electrolyte membrane is based on PEO or PEO-PMMA as a matrix. The method comprises dissolving a substrate and a lithium salt into an organic solvent, adding a nano-filler and a plasticizer into the solution, heating and stirring the solution to obtain an uniform viscous liquid, pouring the uniform viscous liquid to a polytetrafluoroethylene plate, carrying out curtain coating for film formation, and carrying out vacuum drying to obtain the all-solid polymer electrolyte membrane. The preparation method improves electrolyte conductivity. The all-solid polymer electrolyte membrane is uniform and compact, has high electrical conductivity, a large electrochemical window and excellent mechanical performances, satisfies the requirements of the polymer electrolyte for the all solid-state lithium ion battery, and has good stability and safety. The electrolyte prepared by the invention has the advantages of simple design, easy manufacture and safe use.

Description

technical field [0001] The invention relates to an all-solid polymer electrolyte membrane and a preparation method thereof. Background technique [0002] With the development of electric vehicles and the demand for grid energy storage and small energy storage, it is very important to develop batteries that can be used in a wide temperature range and have high safety, high energy density and power density. Among various commercial rechargeable and dischargeable chemical energy storage devices, lithium-ion batteries have the highest energy density. Existing commercial lithium-ion batteries mainly use liquid electrolytes. [0003] Lithium-ion batteries containing liquid organic solvents, due to the slow interaction and reaction of liquid electrolytes with electrode materials and packaging materials, solvents are prone to dry up, volatilize, and leak during long-term service, and electrode materials are easily corroded, affecting battery life. In addition, for lithium-ion recha...

Claims

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Application Information

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IPC IPC(8): H01M8/1018H01M8/1069
CPCH01M8/1018H01M8/1069Y02E60/50
Inventor 林双孙超超张传乐吴涛战祥连张进宇
Owner ZIBO TORCH ENERGY
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