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Conductive polymer/polyelectrolyte solid composite membrane with adjustable resistance and preparation method thereof

A conductive polymer and conductive polymer layer technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of slow diffusion and limitation of doped ions, achieve improved charging and discharging speed, large contact area, and broad application prospects Effect

Inactive Publication Date: 2013-02-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the diffusion of dopant ions in conductive polymers is slow, which limits its application in high-power secondary battery cathode materials for high-speed charge and discharge (see: 1. Research on polypyrrole / polymer solid electrolyte double-layer composite film , Su Jing, Fang Bin, Wang Gengchao, Shi Yuzheng, Journal of Functional Polymers, 14, 2001; 2. Polyaniline composite cathode film solid lithium battery, Yang Lansheng, Applied Chemistry, 13, 1996; 3. Research on solid electrolyte thin film lithium ion battery materials Progress, Wang Bin, Qu Meizhen, Yu Zuolong, Chemical Bulletin, 69, 2006

Method used

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  • Conductive polymer/polyelectrolyte solid composite membrane with adjustable resistance and preparation method thereof
  • Conductive polymer/polyelectrolyte solid composite membrane with adjustable resistance and preparation method thereof
  • Conductive polymer/polyelectrolyte solid composite membrane with adjustable resistance and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1. Preparation of a rapidly adjustable conductive polymer / polyelectrolyte solid composite membrane with sulfonated polyaniline as the conductive polymer

[0040] Dissolve 7.2ml of aniline (An) monomer in 150ml of 3mol / L hydrochloric acid (HCl), and dissolve 4g of ammonium persulfate (APS) in 40ml of 3mol / LHCl. The two solutions were combined while stirring. After reacting for 3 h, the PAn precipitate was separated by filtration, washed with distilled water, and vacuum-dried at room temperature. Take 2g of PAn product and disperse it in 60ml of 1,2-dichloroethane (DCE), add 4.8g of chlorosulfonic acid and heat to 90C while stirring. After reacting for 5 h, the precipitate was separated by filtration, washed with DCE and vacuum-dried at room temperature. The product was dispersed in 80ml of distilled water and heated to reflux for 4h to obtain an aqueous solution of sulfonated PAn. Under stirring conditions at 80°C, 4g polyvinylidene fluoride (PVDF), 3g polycar...

Embodiment 2

[0042] Example 2. Preparation of a rapidly adjustable conductive polymer / polyelectrolyte solid composite membrane with PAn nanofibers as conductive polymers

[0043] Dissolve 3ml of aniline (An) monomer in 100ml of 3mol / L hydrochloric acid (HCl), and dissolve 1.8g of ammonium persulfate (APS) in 80ml of 3mol / L HCl. Under stirring, the two solutions were combined. After reacting for 3 h, the PAn precipitate was separated and washed with distilled water, and finally the PAn was dispersed in distilled water, thereby diluting to obtain a PAn nanofiber suspension with a solid content of 3 mg / ml. Transmission electron microscope observation showed that the microstructure of the PAn product was nanofibers with a diameter of about 30nm. Under stirring conditions at 90°C, 6g of polyvinylidene fluoride (PVDF), 5g of polycarbonate (PC), 2.5g of lithium perchlorate (LiClO 4 ) was dissolved in 250 ml of ethyl acetate (EA), thereby obtaining a PE solution.

[0044] Such as figure 2 As ...

Embodiment 3

[0045] Example 3. Preparation of a rapidly adjustable conductive polymer / polyelectrolyte solid composite membrane with polypyrrole nanofibers as the conductive polymer

[0046] 2.5ml of pyrrole (Py) monomer was dissolved in 150ml of 3mol / L hydrochloric acid (HCl), and 2ml of polyaniline (PAn) nanofiber suspension with a solid content of 8mg / ml was added to induce the formation of polypyrrole nanofibers. form. Dissolve 2.5g of ammonium persulfate (APS) in 60ml of 3mol / L HCl. Under stirring, the two solutions were combined. After reacting for 12 hours, the polypyrrole (PPy) was precipitated and separated and washed with distilled water, and finally the PPy was dispersed in distilled water, thereby diluting to obtain a PPy nanofiber suspension with a solid content of 6 mg / ml. Transmission electron microscopy observations showed that the microstructure of PPy products was nanofibers with a diameter of 70nm. Under stirring conditions at 85°C, 5g of polyvinylidene fluoride (PVDF)...

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Abstract

The invention discloses a conductive polymer / polyelectrolyte solid composite membrane with rapidly adjustable resistance, which is prepared by using a conductive polymer solid membrane as an anode material and compounding a polyelectrolyte membrane formed by polyvinylidene fluoride (PVDF), polycarbonate (PC) and lithium perchlorate (LiClO4). The conductive polymer / polyelectrolyte solid composite membrane can be popularized as an anode layer and a polyelectrolyte layer of a solid electrolyte thin film lithium ion battery, can effectively improve the charging and discharging speed of the cell and has very wide application prospect. Meanwhile, an obtained solid composite membrane material can generate electric conductivity sudden change in a short time after direct current voltage is appliedand can be applied to the field with special requirements. The invention also discloses a preparation method of the conductive polymer / polyelectrolyte solid composite membrane.

Description

technical field [0001] The invention belongs to conductive polymer composite material, specifically, a conductive polymer / polyelectrolyte solid composite or mixed membrane. Background technique [0002] With the continuous development of micromachines, microelectromechanical systems and microsystems, it is urgently required that their power systems have higher energy, smaller volume, more integration and safety. The inherent characteristics of micro-battery just meet this requirement, and have been valued by many countries. In the periodic table of elements, the mass of lithium is small and the electrode potential is low, which makes lithium batteries have the advantages of large specific capacity, high discharge voltage, and small volume. For solid electrolyte thin-film lithium-ion batteries, it has many advanced characteristics, such as very high energy density, long cycle life, high safety inherent in all solid state, easy to make the required shape and size, and can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/137H01M4/60H01M10/0565C08L27/16C08L69/00C08L79/02C08L79/04C08L65/00
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 陆云戴庭阳蒋秀娟苏青
Owner NANJING UNIV