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Lithium battery gel polymer electrolyte and preparation method thereof

A gel polymer, lithium battery technology, applied in the field of lithium batteries, can solve the problems of reducing ion conductivity, poor strength, affecting the performance of lithium batteries, etc., to achieve the effect of improving ion conductivity

Inactive Publication Date: 2018-10-30
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problem of poor strength of the currently widely used lithium battery gel polymer electrolyte, the traditional improvement method by adding whiskers can effectively improve its strength, but it will reduce the ion conductivity, which will affect the performance of lithium batteries. Use performance, the present invention proposes a lithium battery gel polymer electrolyte and a preparation method, thereby effectively improving the strength and at the same time improving the ion conductivity to a certain extent

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  • Lithium battery gel polymer electrolyte and preparation method thereof

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Embodiment 1

[0031] The preparation process is:

[0032] (1) Mix zinc oxide powder, carbon powder and polyvinyl alcohol fiber evenly according to a certain mass ratio, grind them carefully, and then sinter at high temperature. After cooling, collect the white rods on the surface, which are zinc oxide hollow porous crystals. The ratio of raw materials is 30 parts by weight of zinc oxide powder, 5 parts by weight of carbon powder, and 65 parts by weight of polyvinyl alcohol fiber. The temperature of high temperature sintering is 900°C, and the time is 6h. The cooling rate was 10°C / min.

[0033] (2) Dip the zinc oxide hollow porous whiskers prepared in step (1) into a high-concentration lithium salt solution, dry them, and then add an organic solvent for dissolving the polymer to prepare a mixed solution; the lithium salt is lithium hexafluorophosphate. The molar concentration of lithium salt solution is 1.2mol / L. The soaking time is 1h. The polymer is polyacrylamide. The organic solvent...

Embodiment 2

[0040] The preparation process is:

[0041] (1) Mix zinc oxide powder, carbon powder and polyvinyl alcohol fiber evenly according to a certain mass ratio, grind them carefully, and then sinter at high temperature. After cooling, collect the white rods on the surface, which are zinc oxide hollow porous crystals. The ratio of raw materials is 20 parts by weight of zinc oxide powder, 10 parts by weight of carbon powder, and 60 parts by weight of polyvinyl alcohol fiber. The temperature of high temperature sintering is 950°C, and the time is 3h. The cooling rate was 20°C / min.

[0042] (2) Immerse the hollow porous whiskers of zinc oxide prepared in step (1) in a high-concentration lithium salt solution, dry it, and then add an organic solvent for dissolving the polymer to obtain a mixed solution; the lithium salt is tetrafluoroboric acid lithium. The molar concentration of lithium salt solution is 1mol / L. The soaking time is 2h. The polymer is polyacrylamide. The organic sol...

Embodiment 3

[0049] The preparation process is:

[0050] (1) Mix zinc oxide powder, carbon powder and polyvinyl alcohol fiber evenly according to a certain mass ratio, grind them carefully, and then sinter at high temperature. After cooling, collect the white rods on the surface, which are zinc oxide hollow porous crystals. The ratio of raw materials is 25 parts by weight of zinc oxide powder, 10 parts by weight of carbon powder, and 65 parts by weight of polyvinyl alcohol fiber. The temperature of high-temperature sintering is 950° C., and the time is 5 hours. The cooling rate was 15°C / min.

[0051] (2) Immerse the hollow porous whiskers of zinc oxide prepared in step (1) in a high-concentration lithium salt solution, dry it, and then add an organic solvent for dissolving the polymer to obtain a mixed solution; the lithium salt is trifluoromethane lithium sulfonate. The molar concentration of the lithium salt solution is 1.1 mol / L. The soaking time is 1.5h. The polymer is polyacrylam...

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Abstract

The invention provides a lithium battery gel polymer electrolyte and a preparation method thereof. The preparation method of the lithium battery gel polymer electrolyte comprises the following steps:mixing zinc oxide powder, carbon powder and polyvinyl alcohol fiber together and grinding; then sintering at high temperature to obtain zinc oxide hollow porous whiskers; then dipping in a high-concentration lithium salt solution; adding an organic solvent controlled liquid electrolyte dissolving the polymer after drying to prepare a mixed solution; and finally, pouring to a polytetrafluoroethylene plate, so that the lithium battery gel polymer electrolyte is obtained after the organic solvent completely evaporates. The preparation method of the lithium battery gel polymer electrolyte uses thehollow porous whiskers to absorb the lithium salts, therefore, the gel polymer electrolyte has higher strength, and the ionic conductivity is also improved to a certain degree; and the preparation method of the lithium battery gel polymer electrolyte can be widely used in the field of lithium batteries.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to the preparation of electrolytes, in particular to a lithium battery gel polymer electrolyte and a preparation method. Background technique [0002] With the advancement of science and technology, the development of new electronic equipment such as notebook computers, microcomputers, digital cameras, mobile phones, medical equipment, earth satellites in low-earth orbits and high-orbit synchronous satellites. Higher requirements are put forward for the battery industry. New green power sources with low cost, high energy density, high voltage, light weight, wide operating temperature, long cycle life, and good safety performance have become a research hotspot. Lithium-ion secondary batteries have become the brightest and fastest-growing new storage batteries in the market. Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode materi...

Claims

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Application Information

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IPC IPC(8): H01M10/056H01M10/052
CPCH01M10/052H01M10/056H01M2300/0085H01M2300/0091H01M2300/0094Y02E60/10
Inventor 陈庆赵海林
Owner CHENDU NEW KELI CHEM SCI CO LTD