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Negative material, negative plate, battery assembly and preparation methods

A technology for negative electrode materials and battery components, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of poor mechanical properties and collapse of MXene, and achieve the effect of improving electrical conductivity, good electrical conductivity, and improving mechanical properties

Inactive Publication Date: 2019-10-01
桑德新能源技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a negative electrode material in which graphene is intercalated into the interlayer of MXene, which solves the problem of collapse and stacking between MXene layers and also solves the technical problem of poor mechanical properties of MXene

Method used

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  • Negative material, negative plate, battery assembly and preparation methods
  • Negative material, negative plate, battery assembly and preparation methods
  • Negative material, negative plate, battery assembly and preparation methods

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preparation example Construction

[0078] According to another aspect of the present invention, a kind of preparation method of negative electrode material is provided, comprising steps:

[0079] S1: After adding the graphene dispersion to the MXene dispersion at 0-30°C, perform ultrasonication in an inert atmosphere to obtain a suspension;

[0080] S2: removing the solvent in the suspension to obtain the negative electrode material.

[0081] According to the preparation method of the negative electrode material of the present invention, the negative electrode material of the present invention can be prepared, and the prepared negative electrode material can solve the problem of stacking and collapse of MXene, and can also solve the problem of poor mechanical properties and difficult film formation.

[0082] Wherein, the temperature in step S1 is typically but not limited to 0°C, 3°C, 5°C, 8°C, 10°C, 13°C, 15°C, 18°C, 20°C, 23°C, 25°C, 28°C and 30°C.

[0083] Because MXene is prone to oxidation when it is hig...

Embodiment 1

[0131] In this embodiment, step S1 is first carried out: after adding the graphene dispersion to the MXene dispersion at 0-30°C, ultrasonication is performed in an inert atmosphere to obtain a suspension; the specific operations are:

[0132] Take Ti 3 C 2 T x Dispersion (containing 100mg of Ti 3 C 2 T x) in a 500ml beaker, placed in an ice-water bath environment (control temperature below 10°C) while stirring, slowly add the prepared graphene dilute dispersion (containing 20mg graphene), stir for 15min, and dissolve the solution at 20KHZ Ultrasound was applied for 20 minutes while argon protection was introduced, and the temperature of the ultrasonic environment was controlled not to be higher than 25° C. to obtain a suspension.

[0133] Among them, Ti 3 C 2 T x The mass ratio to graphene is 1:0.2.

[0134] Then proceed to S2: remove the solvent in the suspension to obtain the negative electrode material.

[0135] Turn on the vacuum filtration device, filter the sus...

Embodiment 2

[0137] The other conditions of this embodiment and embodiment 1 are all the same, and the difference is that the carbon nanotube slurry is also added in the step S1, and the solid content of the carbon nanotube in the carbon nanotube slurry added is 5mg, namely The mass ratio of MXene to carbon nanotubes is 1:0.05.

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Abstract

The invention relates to a negative material, a negative plate, a battery assembly and preparation methods. The negative material of the invention includes layered MXene serving as the body of the negative material, and graphene inserted between the MXene layers in the form of intercalation. The negative plate disclosed by the invention includes the negative material. The battery assembly disclosed by the invention includes a diaphragm and the negative plate attached to the diaphragm. The preparation method of the negative material disclosed by the invention includes the steps as follows: S1,at 0-30 DEG C, adding graphene dispersion to MXene dispersion and carrying out ultrasonic treatment to obtain suspension; and S2, removing the solvent in the suspension to obtain a negative material.In step S2 of the preparation method of the negative plate disclosed by the invention, a negative plate is obtained by removing a membrane after suction filtration and drying. In step S2 of the preparation method of the battery assembly disclosed by the invention, the suction filtration membrane is a battery diaphragm, and the battery assembly is obtained after suction filtration and drying.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a negative electrode material, a negative electrode sheet, a battery component and a preparation method. Background technique [0002] With the development of portable electronic devices, electric vehicles and wearable devices, the performance requirements of energy storage devices are getting higher and higher. [0003] At present, the battery capacity and rate performance of batteries can not meet the demand. MXene has a large specific surface area, a small ion transmission path, no need for binders and no coating, which can improve the capacity and rate performance of batteries. attention. [0004] MXene is a relatively new two-dimensional material, generally with the general formula M n+1 x n T x Indicates that M represents a transition metal element, X (upper case) represents carbon and / or nitrogen, T represents the functional group generated during the preparation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62H01M4/133
CPCH01M4/133H01M4/36H01M4/625Y02E60/10
Inventor 张诗雪苗力孝
Owner 桑德新能源技术开发有限公司
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