Variable resistance conductive polymer/polyelectrolyte solid composite or mixed film and its preparing method

A technology of conductive polymers and polyelectrolytes, applied in the direction of non-aqueous electrolyte batteries, electrode manufacturing, battery electrodes, etc., can solve the problems of limitations, slow diffusion of doped ions, etc., and achieve improved charging and discharging speed, large contact area, and wide application foreground effect

Inactive Publication Date: 2007-10-10
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Variable resistance conductive polymer/polyelectrolyte solid composite or mixed film and its preparing method
  • Variable resistance conductive polymer/polyelectrolyte solid composite or mixed film and its preparing method
  • Variable resistance conductive polymer/polyelectrolyte solid composite or mixed film and its preparing method

Examples

Experimental program
Comparison scheme
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] 7.2ml of aniline (An) monomer was dissolved in 150ml of 3M hydrochloric acid (HCl), and 4g of ammonium persulfate (APS) was dissolved in 40ml of 3M HCl. 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 90°C 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 pol...

Embodiment 2

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

[0043] 3ml of aniline (An) monomer was dissolved in 100ml of 3M hydrochloric acid (HCl), and 1.8g of ammonium persulfate (APS) was dissolved in 80ml of 3M 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] As shown in Figure 2...

Embodiment 3

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

[0046] 2.5 ml of pyrrole (Py) monomer was dissolved in 150 ml of 3M hydrochloric acid (HCl), and 2 ml of polyaniline (PAn) nanofiber suspension with a solid content of 8 mg / ml was added thereto to induce the formation of polypyrrole nanofibers. 2.5 g of ammonium persulfate (APS) was dissolved in 60 ml of 3M 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 (P...

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Abstract

Resistance quick adjustable conductive polymer (CP) / polymerized electrolyte solid (PES) composite membrane is CP / PES composite membrane by using CP solid membrane as anode material with polyelectrolyte membrane composed of polyvinylidene fluoride (PVDF), polycarbonate (PC), and lithium perchlorate (LiClO4) being compounded, or a kind of solid admixture membrane. The disclosed CP / PES composite membrane or admixture membrane can extend to be as anode layer of lithium ion cell of solid electrolyte thin film or polyelectrolyte layer to raise speed for charging / discharging cell effectively so as to possess wide foreground of application. After DC voltage is applied to the solid composite membrane, mutation of conductivity generates within short time so as to be able to apply to areas with special requirements. The invention also discloses preparation method.

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 Applications(China)
IPC IPC(8): H01M10/40H01M10/38H01M4/60H01M4/04H01M10/052
CPCY02E60/122Y02E60/10
Inventor 陆云戴庭阳蒋秀娟苏青
Owner NANJING UNIV
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