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A kind of ceramic matrix composite solid electrolyte and preparation method thereof

A solid electrolyte, ceramic matrix composite technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problems of poor interface contact, poor mechanical properties, low lithium ion conductivity, etc.

Active Publication Date: 2020-07-07
QINGTAO KUNSHAN ENERGY DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polymer solid electrolyte has good thermal stability, high safety performance, high electrolyte stability to lithium, and good cycle performance; however, polymer electrolyte has poor ability to wet electrodes, low lithium ion conductivity, and chemical reactions at the interface, etc. Problems Limit Polymer Solid Electrolyte Applications
Inorganic solid electrolytes have high lithium ion conductivity, wide electrochemical window, good thermal stability, and stable interface properties, but the preparation of solid electrolytes is difficult, poor interface contact, poor mechanical properties, and volume during battery cycling Problems such as battery performance attenuation caused by the carbon dioxide effect restrict the development of inorganic solid-state electrolytes

Method used

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  • A kind of ceramic matrix composite solid electrolyte and preparation method thereof
  • A kind of ceramic matrix composite solid electrolyte and preparation method thereof
  • A kind of ceramic matrix composite solid electrolyte and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A ceramic matrix composite solid electrolyte, the composite solid electrolyte includes Li1+xAlxTi2-x(PO4)3, polyvinylidene fluoride, lithium perchlorate and gel electrolyte, its thickness is 10-150μm, room temperature ionic conductivity is 1 *10 -4 S / cm~1*10 -3 S / cm, the electrochemical window is greater than 5.0V.

[0038] The mass proportion of Li1+xAlxTi2-x(PO4)3 in the composite solid electrolyte is 80%.

[0039] The mass proportion of polyvinylidene fluoride in the composite solid electrolyte is 5%.

[0040] The mass proportion of lithium perchlorate in the composite solid electrolyte is 10%.

[0041] The gel electrolyte contains polyethylene glycol diacrylate, electrolyte, methacryloxypropyltrimethoxysilane and azobisisobutyronitrile, and the mass ratio of the gel electrolyte in the composite solid electrolyte is 5% ;

[0042] Wherein, polyethylene glycol diacrylate accounts for 3% by mass in the gel electrolyte.

[0043] The mass ratio of methacryloxypropyl...

Embodiment 2

[0058] A ceramic-based composite solid electrolyte, the composite solid electrolyte includes Li7La3Zr2O12, polyvinylidene fluoride-hexafluoropropylene, bis(trifluoromethylsulfonate)imide lithium and gel electrolyte, its thickness is 10-150μm, room temperature ionic The conductivity is 1*10 -4 S / cm~1*10 -3 S / cm, the electrochemical window is greater than 5.0V.

[0059] The mass proportion of Li7La3Zr2O12 in the composite solid electrolyte is 60%.

[0060] The mass proportion of lithium bis(trifluoromethanesulfonate)imide in the composite solid state electrolyte is 20%.

[0061] The mass proportion of vinylidene fluoride-hexafluoropropylene in the composite solid electrolyte is 10%.

[0062] The gel electrolyte includes tetraethylene glycol dimethacrylate, electrolyte, butyl acrylate and azobisisoheptanonitrile, and the mass ratio of the gel electrolyte in the composite solid electrolyte is 10%;

[0063] Wherein, tetraethylene glycol dimethacrylate accounts for 4% by mass in...

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Abstract

The invention discloses a method for preparing a ceramic-based composite solid electrolyte, which is characterized in that: the specific preparation method is as follows: including the preparation of a gel electrolyte, the preparation of a ceramic-based electrolyte and the preparation of a ceramic-based composite electrolyte, wherein the gel electrolyte Preparation, mix acrylate material, cross-linking agent and electrolyte together, stir evenly; add initiator to the above mixed solution, stir evenly after adding; step 2: preparation of ceramic base electrolyte The base pyrrolidone solvent is made into a solution according to the ratio of mass ratio 1:10-20; the fast ion conductor and the lithium salt are added to the above solution according to the metering ratio, and a uniformly dispersed slurry is obtained through stirring, ultrasonication, etc.; the above slurry Evenly coated on a glass plate, dried at 30-60°C for 24 hours, and then vacuum-dried at 50-60°C for 24 hours to obtain an electrolyte membrane with a thickness of 10-150 μm.

Description

technical field [0001] The invention relates to a solid electrolyte for a lithium battery, relates to a ceramic matrix composite solid electrolyte, and also relates to a preparation method of the ceramic matrix composite solid electrolyte. Background technique [0002] At present, lithium-ion batteries generally use LiPF 6 carbonate solution as an organic liquid electrolyte. Because such batteries contain volatile and flammable liquid organic substances, there are safety hazards such as fire and explosion. Gel electrolytes have similar ionic conductivity to liquid electrolytes, and have high interfacial compatibility with positive and negative electrodes. Compared with liquid electrolytes, gel electrolytes are safer, but they cannot eradicate potential safety hazards. [0003] Among the solid electrolyte materials, there are mainly two types of polymer solid electrolytes and inorganic solid electrolytes. Among them, the polymer solid electrolyte is composed of organic pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0562H01M10/0565H01M2300/0068H01M2300/0082Y02E60/10
Inventor 冯玉川李峥何泓材李帅鹏杨帆南策文
Owner QINGTAO KUNSHAN ENERGY DEV CO LTD
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