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Gel polymer electrolyte containing natural high molecular material as well as preparation method and application thereof

A gel polymer, natural polymer technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of "white" pollution and poor biocompatibility, and achieve good compatibility and biocompatibility. The effect of good performance, cycle performance and rate performance

Pending Publication Date: 2013-12-11
DKJ NEW ENERGY S & T CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of poor biocompatibility and "white" pollution of synthetic polymers in existing gel polymer electrolytes. Molecular materials are used as the gel polymer electrolyte matrix, which not only has the characteristics of high ionic conductivity, good compatibility with electrode materials, good safety performance, excellent cycle and rate performance, but also has good biocompatibility and can be Degradable, environmentally friendly gel polymer electrolyte

Method used

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  • Gel polymer electrolyte containing natural high molecular material as well as preparation method and application thereof
  • Gel polymer electrolyte containing natural high molecular material as well as preparation method and application thereof
  • Gel polymer electrolyte containing natural high molecular material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0023] (1) Under stirring at room temperature, dissolve 50 mg of methyl cellulose with a methyl content of about 30% in 20 mL of deionized water, and then cast it on a glass plate. Moisture was evaporated at 80°C, followed by vacuum drying at 100°C to obtain a film with a thickness of 20 µm.

[0024] (2) Transfer the above-mentioned methylcellulose film into a glove box at room temperature, soak it in 1M LiPF6 electrolyte (model LIB315, purchased from Zhangjiagang Guotai Huarong Chemical New Material Co., Ltd.) for 12 hours to obtain the gel polymer electrolyte.

[0025] The methylcellulose film obtained by the above method is measured: the liquid absorption rate of the electrolyte, the ionic conductivity after absorbing the electrolyte, the lithium ion transfer coefficient and the temperature at which the electrolyte is volatilized. The results are shown in Table 1, and the scanning Electron microscopy was used to analyze the morphology, and the results are shown in figure ...

Embodiment 2

[0041](1) Under stirring at room temperature, dissolve 10 g of carboxymethylcellulose (molecular weight: 700,000, carboxymethyl ratio: 0.9) in 40 L of deionized water, and add 2.5 L of N,N-dimethylformamide, and then Cast on a glass plate. Moisture was evaporated at 80°C, and then vacuum-dried at 100°C to obtain a film with a thickness of 30 µm.

[0042] (2) Transfer the above-mentioned carboxymethyl cellulose film into a glove box at room temperature, soak it in 1M LiPF6 electrolyte (model LIB315, purchased from Zhangjiagang Guotai Huarong Chemical New Material Co., Ltd.) for 12 hours to obtain gel polymerization matter electrolyte.

[0043] The carboxymethyl cellulose film obtained by the above method is measured according to Example 1: the liquid absorption rate of the electrolyte, the ion conductivity after absorbing the electrolyte, the lithium ion transfer coefficient and the temperature at which the electrolyte is volatilized, the results are shown in the table 1, and...

Embodiment 3

[0045] (1) Under stirring at room temperature, dissolve 50 mg of soluble starch in 20 mL of deionized water, and then cast it on a glass plate. Moisture was evaporated at 80°C, followed by vacuum drying at 100°C to obtain a film with a thickness of 20 µm.

[0046] (2) Fix the soluble starch film on the surface of smooth and clean aluminum foil, deposit the N-methylpyrrolidone mixture containing 10wt.%PVDF and 1wt.% silicon oxide on the soluble starch film by electrospinning, and place it at 80 ℃ heating plate to volatilize the solvent, and then deposit a layer of PVDF containing silicon oxide on the other side to obtain a composite film of soluble starch and PVDF.

[0047] (3) According to the method of step (2) in Example 1 or 2, after cutting the composite film of soluble starch and PVDF into an appropriate size, place it in a vacuum drying oven at 80° C. for 24 hours to dry and remove trace solvents, and vacuum cool Transfer to a glove box at room temperature. Soak the co...

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Abstract

The invention belongs to the technique fields of high molecular materials and batteries and in particularly relates to a gel polymer electrolyte as well as a preparation method and an application thereof. The gel polymer electrolyte is composed of a liquid electrolyte and a material containing natural high molecules, and has characteristics of not only higher ionic conductivity, better safety performance, better compatibility with an electrode material, better circularity and better multiplying power performance, but also better compatibility with a creature, degradability and environmental friendliness, and can be used as an electrolyte and a membrane barrier of a primary or secondary battery.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and batteries, and in particular relates to a gel polymer electrolyte. The invention also relates to the preparation method of the gel polymer electrolyte and the application of the gel polymer electrolyte, that is, the electrolyte and separator for primary or secondary batteries. Background technique [0002] Among the primary or secondary alkali metal batteries, lithium batteries are currently the most ideal in performance. As a new type of chemical power source, lithium batteries have the advantages of high energy density, environmental friendliness, and no memory effect. Since their commercialization, lithium batteries have been widely used in various portable electronic devices such as notebook computers, digital cameras, and mobile phones. One of the ideal energy storage devices for hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), pure electric vehicles (EV...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/058
CPCY02E60/10Y02P70/50
Inventor 肖时英杨亚琼吴宇平郑健
Owner DKJ NEW ENERGY S & T CO LTD
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