Method of coating solid electrolyte with electrode material, coating material, and electrode prepared using coating method

A solid electrolyte and electrode material technology, applied in solid electrolytes, non-aqueous electrolytes, battery electrodes, etc., can solve problems such as reducing the battery performance of positive electrode materials, and achieve the effects of improving contact, reducing porosity, and optimizing performance.

Active Publication Date: 2020-05-12
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, battery materials are developing toward high specific capacity and high specific energy. High-nickel ternary materials are also one of the battery materials, but NCM811, NCA, etc. coated with halide electrolytes synthesized in situ with water or alcohols Materials, because m

Method used

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  • Method of coating solid electrolyte with electrode material, coating material, and electrode prepared using coating method
  • Method of coating solid electrolyte with electrode material, coating material, and electrode prepared using coating method
  • Method of coating solid electrolyte with electrode material, coating material, and electrode prepared using coating method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The Li surface synthesized by n-hexane as solvent 3 InCl 6 NCM523 cathode material coated particles

[0047] 1g Li 3 InCl 6 Add it to 30ml of anhydrous n-hexane solvent, then put it into a cell crusher to crush it (ultrasonic power 600W, working frequency 20-20KHz) for 10min, and the temperature does not exceed 60°C, then let it stand for 5min to remove the upper liquid, The upper layer liquid was transferred to a beaker with 5g of NCM523 on the bottom layer, then placed in an ultrasonic instrument for 20min, and then transferred to a vacuum drying oven at 85°C for 12 hours to finally obtain the surface Li-containing 3 InCl 6 NCM523 cathode material coated particles.

Embodiment 2

[0048] Embodiment 2 n-heptane is used as the Li-containing compound synthesized by solvent 3 InCl 6 NCM811 cathode material for cladding layer

[0049] 3g Li 3 InCl 6 Add it to 60ml of anhydrous n-heptane solvent, and then put it into a cell crusher for crushing (ultrasonic power 350W, working frequency 20-20KHz) ultrasonic time 2min interval 2min, ultrasonic 10 times, and the temperature does not exceed 60°C. Then weigh 7g of NCM811 and put it into the ultrasonically dispersed liquid, alternately carry out magnetic stirring and ultrasonic cleaning for 30min, and then put it into a vacuum drying oven at 100°C for 12 hours to dry, and finally obtain the Li-containing 3 InCl 6 The NCM811 cathode material of the cladding layer. The obtained sample containing the cladding layer was treated with Li 3 InCl 6 The solid-state electrolyte and In sheet are tested with a blue electric tester by pressing in a mold to form a molded solid-state battery of active material-electrolyte-...

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Abstract

The present invention provides a method for coating an electrode material with a solid electrolyte, an obtained coating material, an electrode prepared by using the coating material, and an all-solid-state battery obtained by using the electrode. The solid electrolyte material mainly aims at halide electrolyte, and comprises LiaMXb, M is one or more of Al, Ga, In, Sc, Y, La, Ho, Sc and the like, Xis one or more of F, Cl and Br, a is more than or equal to 0 and less than or equal to 10, b is more than or equal to 1 and less than or equal to 13, and the X is represented as Li3InCl6, Li3YCl6, Li3YBr6, Li3HoCl6, Li3ScCl6 and the like, and can also be a mixture for coating a solid electrolyte and a conductive agent. According to the invention, the contact between the electrolyte and the electrode material can be significantly improved, the porosity of the pole piece is reduced, the ionic conductivity of the solid electrolyte is not changed after an alkane solvent treatment process, an all-solid-state battery assembled by the electrode material containing the coating layer is simple in process, and the battery can exert high capacity and good rate capability and has a commercial prospect.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, and discloses a method for coating a solid electrolyte on an electrode material with a solvent, and an application of a material containing a coating layer in a battery. Background technique [0002] It has been reported in the literature that Li 3 InCl 6 , Li 3 YCl 6 , Li 3 YBr 6 , Li 3 HoCl 6 , Li 3 ScCl 6 The synthesis of halide solid-state electrolytes, and is used in the field of solid-state batteries. The synthesis method of this type of electrolyte is simple and can be synthesized by liquid phase method, for example: Li 3 InCl 6 Solid state electrolyte, and this type of material can be combined with the positive electrode material to form a coating material through a liquid phase coating method. [0003] Theoretically, the electrode material containing the electrolyte coating layer is more fully combined with the electrolyte and the battery material than the method o...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/0562
CPCH01M4/366H01M4/485H01M4/505H01M4/525H01M10/0565H01M10/0562H01M2300/0068Y02E60/10
Inventor 王晶赵尚骞武兆辉朱秀龙张一张刚宁卢世刚
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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