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Lithium/polyparrole secondary button cell and its preparation method

A button battery, polypyrrole technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve problems such as difficulty in peeling positive electrode materials and electrodes, unsuitable for large-scale industrial production, etc., and achieve easy industrial production and high discharge capacity. , the effect of simple process

Inactive Publication Date: 2006-10-18
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 invention relates to a lithium / polypyrrole secondary button battery and a preparation method thereof, belonging to a lithium / polymer secondary button battery using polypyrrole / silicon dioxide or carbon black nanocomposite materials and the preparation technology thereof. In order to improve the performance of the secondary battery and meet the needs of the society, the present invention provides a novel secondary button battery. It is a secondary button battery mainly composed of a positive electrode sheet coated with a positive electrode coating material containing polypyrrole / silicon dioxide or carbon black nanocomposite material, a negative electrode lithium sheet, a three-layer microporous composite membrane and an electrolyte. Its assembly is in the argon glove box, put the lithium sheet in the negative electrode shell, lay the diaphragm, and drop the electrolyte; then place the prepared positive electrode sheet on the diaphragm, press the gasket, and put the spring sheet , buckle the positive electrode shell, and seal the battery on a press to make a button battery. The battery has high discharge capacity, coulombic efficiency and cycle life, and good static stability. The invention has simple process and is easy for industrialized production, and adds new varieties to the lithium / polymer secondary battery.

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