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Solid-state polymer electrolyte and preparation method thereof

A solid polymer and electrolyte technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolyte immobilization/gelation, etc., can solve the problem of low conductivity of solid polymer electrolytes, and achieve superior conductivity performance, method Simple, low internal resistance effect

Active Publication Date: 2016-06-15
SHANDONG YUHUANG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductivity of solid polymer electrolytes prepared only with PEO as a single matrix is ​​relatively low (10 -6 ~10 -8 ), which cannot meet the actual demand

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take PEO and PVDF at a mass ratio of 1:1, weigh 1g and dissolve in N,N-dimethylformamide, then weigh 0.10g of lithium perchlorate (LiClO4) and dissolve in this mixed solution, and perform ultrasonication for 20min , make five groups, and then add 0.1g, 0.2g, 0.3g, 0.4g, 0.5g of modified mesoporous silica (MCM41 / P25) respectively, and stir in a water bath at 35°C for 24h.

[0039] The obtained viscous solution was poured on a smooth glass plate, scraped with a spatula, left at room temperature for 2h, and then moved into a vacuum oven at 60°C for 12h. A solid polymer electrolyte is obtained.

[0040] Use a scraper to peel off the solid polymer electrolyte membrane from the glass plate, cut it into an appropriate size, quickly move it into the glove box, and install it into a CR2032 button battery. The EIS test was carried out with an electrochemical workstation and the conductivity was obtained through calculation.

Embodiment 2

[0042] Take PEO and PVDF at a mass ratio of 1:1, weigh 1g and dissolve in N,N-dimethylformamide, then weigh 0.10g of lithium perchlorate (LiClO4) and dissolve in this mixed solution, and perform ultrasonication for 20min , and then add 0.2 g of modified mesoporous silica (MCM41 / P25), and stir in a water bath at 35° C. for 24 h.

[0043] The obtained viscous solution was poured on a smooth glass plate, scraped with a spatula, left at room temperature for 2h, and then moved into a vacuum oven at 60°C for 12h. A solid polymer electrolyte is obtained.

[0044] Use a scraper to peel off the solid polymer electrolyte membrane from the glass plate, cut it into an appropriate size, quickly move it into the glove box, and install it into a CR2032 button battery. EIS tests were performed with an electrochemical workstation.

Embodiment 3

[0046] Take PEO and PVDF at a mass ratio of 1:1, weigh 1g and dissolve them in N,N-dimethylformamide, then weigh 0.05g of lithium tetrafluoroborate and dissolve them in the mixed solution, perform ultrasonication for 20min, and then Add 0.2 g of modified mesoporous silica (MCM41 / P25), and stir in a water bath at 35° C. for 24 h.

[0047] The obtained viscous solution was poured on a smooth glass plate, scraped with a spatula, left at room temperature for 2h, and then moved into a vacuum oven at 60°C for 12h. A solid polymer electrolyte is obtained.

[0048] Use a scraper to peel off the solid polymer electrolyte membrane from the glass plate, cut it into an appropriate size, quickly move it into the glove box, and install it into a CR2032 button battery. EIS tests were performed with an electrochemical workstation.

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Abstract

The invention relates to a preparation method of a modified mesoporous silica-doped solid-state polymer electrolyte for a lithium-ion battery. The method comprises the following steps: dissolving polymer matrix into a solvent to prepare a polymer solution; with lithium perchlorate (LiClO4) as a lithium salt, dispersing the modified mesoporous silica into the obtained polymer solution; carrying out dispersing and casting to form a film; and after the solvent volatilizes, obtaining a composite polymer film, namely the composite polymer electrolyte for the lithium-ion battery. The method is simple to operate; the solid-state polymer electrolyte with high mechanical property and high ionic conductivity is easy to obtain; and the solid-state polymer electrolyte has a wide application prospect in the aspect of a power lithium-ion battery car.

Description

(1) Technical field [0001] The invention belongs to the field of lithium ion batteries, in particular to a solid polymer electrolyte and a preparation method thereof. (2) Background technology [0002] With the gradual consumption of traditional energy sources, people realize the importance of developing new energy sources. As a science and technology for the development of new energy, lithium-ion batteries have been developed rapidly and steadily and have been applied to various fields. Electrolytes, as an important part of lithium-ion batteries, have gained widespread attention. At present, the most commercialized liquid electrolyte is the liquid electrolyte, which has the advantages of high ionic conductivity at room temperature, but there are also significant problems, such as: containing flammable, toxic, and volatile organic solvents, which will cause gas in the process of use and cause battery damage. Volume expansion affects battery life. Especially under some spe...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/058
CPCH01M10/0565H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 王龙王超武赵成龙王瑛李丽于文倩陈建伟张庆朋
Owner SHANDONG YUHUANG NEW ENERGY TECH
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