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Preparation process of polyimide silicon tab material

A polyimide silicon, preparation process technology, applied in structural parts, electrical components, battery pack components and other directions, can solve problems such as poor electrical conductivity of tabs, improve electrical conductivity, improve interface compatibility performance, The effect of improving the battery rate

Active Publication Date: 2021-11-23
LANXI ZHIDE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a preparation process of polyimide silicon tab material, which solves the problem of poor electrical conductivity of the existing tabs.

Method used

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  • Preparation process of polyimide silicon tab material
  • Preparation process of polyimide silicon tab material
  • Preparation process of polyimide silicon tab material

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preparation example Construction

[0042] A preparation process of a polyimide silicon tab material, specifically comprising the following steps:

[0043] Preparation of honeycomb porous polyimide;

[0044] Silicon, silicon oxide, and lithium compounds are mixed into mixed powder;

[0045] Filling the mixed powder into honeycomb porous polyimide by plasma gas phase method to obtain deposition material;

[0046] The deposition material is prepared by carbon deposition to obtain the negative electrode material.

[0047] Such as figure 1 Shown is the scanning image of the prepared honeycomb polyimide, and the mixed powder is filled into the honeycomb porous polyimide by the plasma gas phase method to obtain the deposition material, specifically as image 3 shown. Such as figure 2 Shown is the integrated lug scan.

[0048] In the above embodiment, the copper foil is replaced by polyimide, which improves the compatibility between the copper interface and the interface of the negative electrode material; since...

Embodiment 1

[0070] A preparation process of a polyimide silicon tab material, specifically comprising the following steps:

[0071] (1) prepare honeycomb porous polyimide;

[0072] S1-1: Dissolving under nitrogen protection with pyromellitic dianhydride, 4,4'-diaminodiphenyl ether, dimethylacetamide, N-methyl-2 pyrrolidone, and fluorine compounds as raw materials;

[0073] S1-2: Stir and reflux the solution obtained in the step S1-1 under nitrogen protection for 2h;

[0074] S1-3: The solution refluxed through the step S1-2 is prepared into a film of 25 μm by injection-calendering, and dried at 40° C.;

[0075] S1-4: The film dried in step S1-3 is subjected to graphitization treatment at a treatment temperature of 2500° C. and kept for 5 hours.

[0076] (2) silicon, silicon oxide, and lithium compounds are mixed into mixed powder;

[0077] Take 20 parts of high-purity silicon, 80 parts of silicon oxide, and 2 parts of lithium compound, and put them in a ball mill for 10 hours, and the ...

Embodiment 2

[0085] A preparation process of a polyimide silicon tab material, specifically comprising the following steps:

[0086] (1) prepare honeycomb porous polyimide;

[0087] S1-1: Dissolving under nitrogen protection with pyromellitic dianhydride, 4,4'-diaminodiphenyl ether, dimethylacetamide, N-methyl-2 pyrrolidone, and fluorine compounds as raw materials;

[0088] S1-2: Stir and reflux the solution obtained in the step S1-1 under nitrogen protection for 10 h;

[0089] S1-3: The solution refluxed through the step S1-2 is prepared into a film of 2100 μm by injection-calendering, and dried at 80° C.;

[0090] S1-4: The film dried in the step S1-3 is subjected to graphitization treatment at a treatment temperature of 3000° C. and kept for 10 hours.

[0091] (2) silicon, silicon oxide, and lithium compounds are mixed into mixed powder;

[0092] Take 40 parts of high-purity silicon, 30 parts of silicon oxide, and 10 parts of lithium compound, and put them in a ball mill for 10 hours...

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Abstract

The invention provides a preparation process of a polyimide silicon tab material, and relates to the field of lithium batteries. The method includes the following steps: preparing honeycomb porous polyimide; mixing silicon, silicon oxide, and lithium compounds into mixed powder; filling the mixed powder into honeycomb porous polyimide by plasma gas phase method to obtain a deposition material; the deposition material The anode material was prepared by carbon deposition. The mixed powder of silicon, silicon oxide and lithium compound is filled into the honeycomb porous polyimide by plasma gas phase method to obtain the deposition material, and the deposition material is used as the tab material to improve the interface compatibility between the copper interface and the negative electrode material Poor performance improves the overall tab conductivity, thereby increasing the battery rate; since no polymer paste is added, the negative electrode active material is in direct contact with polyimide, which effectively improves the electron transport speed and electron cycle stability. The technical problem of poor electrical conductivity of the existing tabs is solved from the origin of the materials used to prepare the tabs.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a preparation process of a polyimide silicon tab material. Background technique [0002] With the great progress and rapid development of the information age, multi-functional portable electronic devices, electric vehicles, aircraft, artificial assist and other devices have put forward higher requirements for energy storage materials. Therefore, it is imminent to develop new lithium battery electrode materials with high specific capacity, high rate, and high safety. [0003] Tabs are a raw material for lithium-ion polymer battery products. The battery is divided into positive and negative poles, and the tabs are the metal conductors that lead the positive and negative poles out of the battery. In layman's terms, the ears of the positive and negative poles of the battery are the contact points when charging and discharging. [0004] In the preparation process of the existing tab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/534H01M50/531
CPCY02E60/10
Inventor 伍小波房冰陈青华刘江平张晓丹
Owner LANXI ZHIDE ADVANCED MATERIALS CO LTD