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Lithium/polyparrole secondary button cell and its preparation method

A button battery and polypyrrole technology, which is applied in the direction of secondary batteries, battery electrodes, circuits, etc., can solve the problems of unsuitability for mass industrial production, difficulty in peeling off positive electrode materials and electrodes, etc., and achieve easy industrial production and high discharge capacity , good static stability effect

Inactive Publication Date: 2005-03-23
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above literature reports provide a basis for polypyrrole / carbon black nanocomposites to be used as positive electrodes for lithium secondary batteries, but they are all prepared by electrochemical methods, and it is difficult to peel off the positive electrode material from the electrode, which is not suitable for mass industrial production.
[0005] Polypyrrole / silicon dioxide (carbon black) (PPy / SiO 2 (C)) The nanocomposite material is used as the positive electrode of the lithium secondary battery, which has not been reported yet.

Method used

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  • Lithium/polyparrole secondary button cell and its preparation method
  • Lithium/polyparrole secondary button cell and its preparation method
  • Lithium/polyparrole secondary button cell and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation process of lithium / polypyrrole secondary button cell is as follows:

[0035] · Preparation of positive electrode active material:

[0036] The positive active material is polypyrrole / silicon dioxide nanocomposite. The material adopts the material provided in the 01136948.5 patent application.

[0037] · Preparation of positive electrode sheet 4:

[0038] Mix 1 gram of polypyrrole / silicon dioxide nanocomposite material obtained by the above method with 0.05 gram of conductive carbon black with a particle size of 33nm, 0.1 gram of adhesive polyvinylidene fluoride and 10ml of N-methylpyrrolidone (NMP), and make it easy to coat The coated slurry is coated on the collector (aluminum foil with a thickness of 0.015mm), put in a vacuum oven at 50°C and dried for 1 hour, take it out, punch it into a disc, put it in a vacuum oven at 50°C, and bake for 24 Take it out in 1 hour; then, cut it, pressurize 10MPa to shape it, so that the thickness of the positive ele...

Embodiment 2

[0044] After the prepared slurry is coated on the collector, put it in a 50°C vacuum oven to dry for 1.5 hours, take it out, punch it into a disc, put it in a 50°C vacuum oven, bake it for 24 hours and take it out; Carry out cutting, pressurize 20MPa and set the shape, make the thickness of the positive electrode sheet be 0.15mm, weigh, and finally store in a vacuum for future use. Others are with embodiment 1.

Embodiment 3

[0046] After coating the prepared slurry on the collector, put it in a vacuum oven at 50°C to dry for 2 hours, take it out, punch it into a disc, put it in a vacuum oven at 50°C, bake it for 24 hours and take it out; then, Carry out cutting, pressurize 30MPa finalize shape, make the thickness of positive electrode sheet be 0.1mm, finally store in vacuum, standby. Others are with embodiment 1.

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Abstract

The lithium / polypyrrole secondary button cell and its preparation method belong to preparing the lithium / polymer secondary button cell with the polypyrrole / silicon dioxide or carbon black nanometer composite material and its preparation method. The invention increases the performance of the secondary cell, caters to the requirement of the society and provides a new-type secondary button cell. It is composed of the positive plate covered with the anode coating material containing the polypyrrole / silicon dioxide or charcoal black nanometer composite material, cathode of lithium plate, three layers of micro-hole composite membrane and electrolyte. We assemble them in the argon gas glove box, put the lithium plate in the cathode hull, lay the clapboard, drip the electrolyte into it , put the anode plate on the clapboard, press the shim, put the leaf spring on it, cover it with anode hull, seal the cell with press and get the button cell. The cell is featured by the large discharge capacity, high coulomb efficiency; long recycle life and good standing stability. The invention is featured by simple technique and easy industrialized production and provides a new product of lithium / polymer secondary cell.

Description

technical field [0001] The invention belongs to a novel lithium / polymer secondary battery and its preparation technology, in particular to a lithium / polypyrrole secondary button battery and its preparation technology. Background technique [0002] With the rapid development of communication technology and computer technology, all kinds of information electronics such as mobile phones and notebook computers are moving towards the goal of "light, thin, short and small". The demand for secondary batteries is very urgent. The new secondary battery technology is regarded as a dual-use technology with strategic significance in the 21st century. However, the current secondary batteries still need to be improved in terms of shape, charge and discharge safety, environmental issues, capacity density, charge and discharge stability, and static stability. [0003] In order to improve the performance of secondary batteries, the selection of suitable cathode materials is the key. Compa...

Claims

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Application Information

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IPC IPC(8): C08F132/06C08K3/36C08L45/00H01M4/02H01M4/60H01M10/38
CPCY02E60/10Y02P70/50
Inventor 任丽王立新朱嫦娥安灏媛
Owner HEBEI UNIV OF TECH