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High-conductivity polymer solid electrolyte and preparation method thereof

A solid electrolyte and polymer technology, applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., can solve the problems of low conductivity and lithium ion migration number, poor compatibility of electrode materials, etc.

Active Publication Date: 2021-09-14
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a kind of highly conductive polymer solid state electrolyte and its preparation method, to solve the existing polymer The problem of low conductivity and lithium ion migration number of solid electrolyte and poor compatibility with electrode materials

Method used

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  • High-conductivity polymer solid electrolyte and preparation method thereof
  • High-conductivity polymer solid electrolyte and preparation method thereof

Examples

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Embodiment 1

[0038] A preparation method of a highly conductive polymer solid electrolyte, comprising the following steps:

[0039] (1) Preparation of cesium oleate precursor

[0040] 0.391g of cesium carbonate (Cs 2 CO 3 ), 1.27 mL of oleic acid (OA) and 18.73 mL of 1-octadecene (ODE) were added to a 50 mL three-necked flask. The cesium oleate precursor was prepared by stirring at 120°C under argon flow for 60 minutes and heating to 160°C to obtain a clear solution. Because cesium oleate is easily precipitated from ODE at room temperature, it must be preheated to above 80 °C before injection, that is, the cesium oleate precursor should be kept at a temperature above 80 °C for use.

[0041] (2) CsPbI 3 Preparation of perovskite quantum dots

[0042]Add 0.1844g lead iodide PbI to a 100mL three-necked flask 2 , and then 24 mL of 1-octadecene (ODE) was added. After stirring under argon at room temperature for 30 minutes, the mixture was heated to 120°C and stirred for an additional 30 ...

Embodiment 2

[0047] The difference between embodiment 2 and embodiment 1 is that the lead source added is lead chloride, and the addition amount is 0.1112g, and the rest are the same as those in embodiment 1.

Embodiment 3

[0049] The difference between Example 3 and Example 1 is that the lead source added is lead bromide, and the amount added is 0.149 g, and the rest are the same as in Example 1.

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Abstract

The invention discloses a high-conductivity polymer solid electrolyte and a preparation method thereof. The preparation method comprises the following steps: adding PEO powder into a solution containing lithium salt, then adding perovskite quantum dots, heating and stirring at 50-70 DEG C for 20-28 hours to obtain uniform slurry, putting the slurry into a mold to form a membrane, removing a solvent, and finally performing vacuum drying to prepare a high-conductivity polymer solid electrolyte membrane. A PEO-based polymer solid electrolyte is mainly modified, the room-temperature ionic conductivity, the lithium ion transference number and the compatibility to a lithium metal negative electrode can be greatly improved through the modified polymer solid electrolyte, and finally the PEO-based polymer solid electrolyte with the high conductivity characteristic is obtained.

Description

technical field [0001] The invention relates to the technical field of solid electrolytes, in particular to a highly conductive polymer solid electrolyte and a preparation method thereof. Background technique [0002] As an energy storage device, the battery plays an important role in the development of today's society. Traditional rechargeable batteries include lead-acid batteries, cadmium-nickel batteries, etc. However, due to the serious environmental pollution problems of lead-acid batteries and cadmium-nickel batteries, such as heavy metal lead, hard-to-digest lead oxides, dust, acid mist, Pollutants such as waste acid and heavy metal cadmium will cause considerable damage to the environment, causing unnatural phenomena such as global temperature warming and acid rain. As a high-efficiency secondary energy storage device, lithium-ion batteries have the advantages of high energy density, high output power, high operating voltage, wide operating temperature, long cycle l...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0565H01M10/0525
CPCH01M10/058H01M10/0565H01M10/0525H01M2300/0091Y02P70/50Y02E60/10
Inventor 张海涛汪宇辰徐忠黄浚峰
Owner SOUTHWEST JIAOTONG UNIV
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