Ceramic-based composite solid-state 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 difficult preparation of solid electrolytes, low lithium ion conductivity, poor ability to wet electrodes, etc. Good ability, high ionic conductivity, and the effect of inhibiting lithium dendrites

Active Publication Date: 2018-07-27
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

Method used

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  • Ceramic-based composite solid-state electrolyte and preparation method thereof
  • Ceramic-based composite solid-state electrolyte and preparation method thereof
  • Ceramic-based composite solid-state electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example one:

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

[0038] Among them, 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 ratio of lithium perchlorate in the composite solid electrolyte is 10%.

[0041] The gel electrolyte contains polyethylene glycol diacrylate, electrolyte, methacryloxypropyltrimethoxysilane and azobisisobutyronitrile, and the gel electrolyte accounts for 5% by mass in the composite solid electrolyte ;

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

[0043] The mass ra...

Example Embodiment

[0057] Embodiment two:

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

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

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

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

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

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

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Abstract

The invention discloses a preparation method of ceramic-based composite solid-state electrolyte. The specific preparation method is characterized by comprising the following steps: preparation of gelelectrolyte, preparation of ceramic-based electrolyte and preparation of ceramic-based composite electrolyte, wherein the preparation of the gel electrolyte comprises the steps: mixing an acrylate material, a crosslinking agent and electrolyte, adding an initiator into the mixed solution and uniformly stirring after adding the initiator; in step 2, the preparation of the ceramic-based electrolytecomprises the following steps: preparing a binding agent and an N-methylpyrrolidone solvent into a solution according to the mass ratio of 1 to (10 to 20); weighing a fast ion conductor and lithium salt according to a stoichiometric ratio and adding into the solution; carrying out stirring, ultrasonic treatment and the like to obtain uniformly-dispersed slurry; uniformly coating the slurry on a glass plate and drying at 30 to 60 DEG C for 24h; then drying for 24h in vacuum and at 50 to 60 DEG C, so as to obtain an electrolyte film with the thickness of 10 to 150mu m.

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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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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