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A kind of self-supporting p/cnts composite flexible film and its preparation method and application

A flexible thin film, self-supporting technology, applied in the direction of final product manufacturing, secondary battery manufacturing, active material electrodes, etc., to achieve the effect of simple synthesis process, ease of fragmentation, and slow down the poor conductivity

Active Publication Date: 2021-09-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a highly elastic self-supporting P / CNTs composite flexible film and its preparation method and application in order to alleviate the large volume change of red phosphorus during charging and discharging. , poor electrical conductivity and poor electrode stability

Method used

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  • A kind of self-supporting p/cnts composite flexible film and its preparation method and application

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preparation example Construction

[0026] The invention provides a method for preparing a highly elastic self-supporting P / CNTs composite flexible film, comprising the following steps:

[0027] S1, the preparation of nano-scale red phosphorus:

[0028] Carry out 4 hours of high-energy ball milling treatment on commercial red phosphorus (the ratio of red phosphorus to steel balls is 10:1), break the micron-sized red phosphorus into nano-sized red phosphorus, and obtain nano-sized red phosphorus A;

[0029] S2. Preparation of P / CNTs:

[0030] Add carbon nanotubes CNTs to red phosphorus A and continue ball milling for 1 hour to obtain B(P / CNTs). The weight ratio of red phosphorus A to CNTs is (6-9):(4-1).

[0031] S3. Preparation of highly elastic self-supporting P / CNTs composite flexible film:

[0032] Stir B(P / CNTs) and SBS rubber with toluene at a mass ratio of (6-9):(4-1) for 2-3 hours to obtain a certain concentration of slurry C; finally, apply slurry C on PET On the film, after natural drying at room tem...

Embodiment 1

[0039] Step 1, the preparation of nanoscale red phosphorus:

[0040] Carry out 4 hours of high-energy ball milling treatment on commercial red phosphorus (the ratio of red phosphorus to steel balls is 10:1), break the micron-sized red phosphorus into nano-sized red phosphorus, and obtain nano-sized red phosphorus A;

[0041] Step 2, preparation of P / CNTs:

[0042] Add CNTs to red phosphorus A and continue ball milling for 1 hour to obtain B(P / CNTs), the weight ratio of red phosphorus to CNTs is 6:4.

[0043] Step 3, preparation of highly elastic self-supporting P / CNTs composite flexible film:

[0044] Stir B and SBS rubber in toluene at a ratio of 6:4 for 2 hours to obtain a certain concentration of slurry C; finally, apply slurry C on a PET film, and after natural drying at room temperature, the prepared film can be It is easily peeled off from the PET film to obtain a self-supporting flexible film D with certain elasticity.

[0045] A highly elastic self-supporting P / CNTs c...

Embodiment 2

[0049] Step 1, the preparation of nanoscale red phosphorus:

[0050] Carry out 4 hours of high-energy ball milling treatment on commercial red phosphorus (the ratio of red phosphorus to steel balls is 10:1), break the micron-sized red phosphorus into nano-sized red phosphorus, and obtain nano-sized red phosphorus A;

[0051] Step 2, preparation of P / CNTs:

[0052] Add CNTs to red phosphorus A and continue ball milling for 1 hour to obtain B(P / CNTs), the weight ratio of red phosphorus to CNTs is 7:3.

[0053] Step 3, preparation of highly elastic self-supporting P / CNTs composite flexible film:

[0054] Stir B and SBS rubber in toluene at a ratio of 7:3 for 3 hours to obtain a certain concentration of slurry C; finally, apply slurry C on a PET film and dry it naturally at room temperature to obtain a film that can It is easily peeled off from the PET film to obtain a self-supporting flexible film D with certain elasticity.

[0055] A highly elastic self-supporting P / CNTs comp...

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Abstract

The invention discloses a self-supporting P / CNTs composite flexible film and a preparation method and application thereof. Using cheap red phosphorus as a raw material, high-elasticity self-supporting P / CNTs are prepared by a high-energy ball milling method that is simple, efficient and can be mass-produced. The composite flexible film has a simple synthesis process, is easy to operate, and is beneficial to industrial production. The film fully combines the high capacity of red phosphorus, the high conductivity of CNTs and the stickiness of SBS, which alleviates the problems of poor conductivity and fragility of the material, and improves the electrochemical performance of the material. It provides a new idea for the later study of sodium-ion battery materials.

Description

technical field [0001] The invention belongs to the technical field of sodium ion batteries, and in particular relates to a highly elastic self-supporting P / CNTs composite flexible film, a preparation method and application thereof. Background technique [0002] In 2015, the global energy consumption was about 16TW, which is expected to grow to about 24TW by 2035. Energy is increasingly stored electrochemically in batteries, and intermittent renewable energy and its widespread use in electrified powertrains will further increase storage performance. Lithium-ion batteries (LiB), due to the advantages of high specific energy, rate capability, and cycle life, have become the most promising energy storage applications. However, the two key elements in LIBs, lithium and cobalt, are scarce and unevenly distributed globally due to their high price, which greatly limits their development. For these reasons, there is an urgent need to develop a new type of battery that can replace ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/38H01M4/139H01M4/13H01M10/04H01M10/054B82Y30/00
CPCB82Y30/00H01M4/13H01M4/139H01M4/38H01M4/625H01M4/628H01M10/0427H01M10/054H01M2004/027Y02E60/10Y02P70/50
Inventor 杨艳玲孙瑜陈志刚邹鑫鑫朱建锋陈华军毕雅欣锁国权和茹梅冯雷叶晓慧张荔侯小江
Owner SHAANXI UNIV OF SCI & TECH
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