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In-situ composite polymer solid electrolyte and preparation method and application thereof

A solid electrolyte and polymer technology, applied in the field of materials, can solve the problems of high preparation cost, easy leakage, high brittleness, etc., achieve high ion conductivity, good stability, and improve the effect of ion conductivity

Active Publication Date: 2019-08-13
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It effectively overcomes the problems of liquid electrolytes such as easy leakage, short circuit, and short life, and makes up for the shortcomings of inorganic solid electrolytes such as high brittleness, poor film formation, poor mechanical deformation, and high preparation costs.

Method used

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  • In-situ composite polymer solid electrolyte and preparation method and application thereof
  • In-situ composite polymer solid electrolyte and preparation method and application thereof
  • In-situ composite polymer solid electrolyte and preparation method and application thereof

Examples

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Embodiment 1

[0036] This embodiment provides an in-situ composite sodium ion polymer solid electrolyte and a preparation method thereof.

[0037] The in-situ composite polymer solid electrolyte of this embodiment includes: a polymer matrix, a fluorine-containing alkali metal salt, oxide nanoparticles, and in-situ generated fluorides; wherein, the in-situ generated fluorides are: oxide nanoparticles React with hydrofluoric acid generated by partial reaction of fluorine-containing alkali metal salt and solvent, generate one or more fluorides in situ, and coat the surface of oxide nanoparticles.

[0038] In this embodiment, the polymer matrix may include: polyacrylonitrile, polyvinylidene fluoride, poly(vinylidene fluoride-hexafluoropropylene), polyethylene oxide, polypropylene carbonate, polymethyl methacrylate, aromatic main One or more of chain polymers, polyamides, polyesters and olefin polymers. The fluorine-containing alkali metal salt may specifically include: one or more of tetrafluo...

Embodiment 2

[0049] This example provides an in-situ composite sodium ion polymer solid electrolyte and a preparation method thereof. The in-situ composite polymer solid electrolyte is composed of polyethylene oxide, sodium salt, alumina nanoparticles and in-situ generated aluminum fluoride composition. The preparation method is as follows:

[0050] Step 1: In the glove box, weigh 1g of bisfluorosulfonimide sodium into a capped glass bottle, take out the glass bottle from the glove box, add 60ml of deionized water to obtain a salt solution;

[0051] Step 2: Weigh 0.04g of alumina nanoparticles in the above salt solution, then cover the glass bottle, put it into an ultrasonic instrument for 30min, and obtain a uniform suspension;

[0052] Step 3: Weigh 3g of polyethylene oxide into the above suspension, stir for 24 hours to obtain a uniform slurry;

[0053] Step 4: Cast the above slurry into a PTFE template by solution casting method, and after drying, put it into a vacuum oven at 55°C to...

Embodiment 3

[0056] This example provides an in-situ composite sodium ion polymer solid electrolyte and a preparation method thereof. The in-situ composite polymer solid electrolyte is composed of polyethylene oxide, sodium salt, magnesium oxide nanoparticles and in-situ generated magnesium fluoride composition. The preparation method is as follows:

[0057] Step 1: In the glove box, weigh 1g of sodium dihexafluorophosphate into a capped glass bottle, take out the glass bottle from the glove box, add 50ml of acetonitrile and 10ml of deionized water to obtain a salt solution;

[0058] Step 2: Weigh 0.08g of magnesium oxide nanoparticles in the above-mentioned salt solution, then cover the glass bottle, put it into an ultrasonic instrument and sonicate for 30min to obtain a uniform suspension;

[0059] Step 3: Weigh 3g of polyethylene oxide into the above suspension, stir for 24 hours to obtain a uniform slurry;

[0060] Step 4: Cast the above slurry into a PTFE template by solution castin...

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Abstract

The invention discloses an in-situ composite polymer solid electrolyte and a preparation method and application thereof. The in-situ composite polymer solid electrolyte comprises a polymer matrix, fluorine-containing alkali metal salt, oxide nanoparticles and fluoride generated in situ, wherein one or more fluoride is generated in situ through the hydrofluoric acid reaction between the oxide nanoparticles and the fluorine-containing alkali metal salt in a solvent; and the fluoride coats the surfaces of the oxide nanoparticles. Through the fluoride coating layer generated on the surfaces of thenanoparticles in the in-situ composite polymer solid electrolyte, the ionic conductivity and the electrochemical stability are improved, the interface between the electrolyte and the electrode in thesolid-state secondary battery is stabilized, the rate capability of the solid-state battery is effectively improved, the coulombic efficiency of the solid-state battery is effectively improved, and the cycle life of the solid-state battery is effectively prolonged.

Description

technical field [0001] The invention relates to the field of material technology, in particular to an in-situ composite polymer solid electrolyte and its preparation method and application. Background technique [0002] In recent years, due to the increasingly prominent contradictions among energy, resources, and the environment, countries around the world have introduced policies and measures to promote the development of new energy technologies and increased capital investment. In the field of new energy technology, secondary ion batteries represented by lithium-ion batteries are a new type of clean and renewable secondary energy. Lithium-ion batteries have the advantages of high working voltage, high energy density, and light weight. They are used in mobile phones, Notebook computers, electric tools, digital cameras, electric vehicles and other fields have been widely used and show a strong development trend. At the same time, other secondary ion batteries such as sodium...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/0565
CPCH01G11/56H01M10/0562H01M10/0565H01M2300/0082Y02E60/10
Inventor 胡勇胜刘丽露戚兴国索鎏敏陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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