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Lithium-ferrous disulfide disposable button cell and its preparing method

A technology of ferrous disulfide and button batteries, which is applied to the electrodes of primary batteries, battery electrodes, non-aqueous electrolyte batteries, etc. It can solve the problems of long-term survival and environmental pollution of button batteries, achieving low cost The effect of reducing the internal resistance of the battery and improving the electrical performance

Inactive Publication Date: 2007-11-28
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline Zn-MnO 2 Button batteries contain mercury that pollutes the environment and are difficult to survive in the international market for a long time

Method used

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  • Lithium-ferrous disulfide disposable button cell and its preparing method

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preparation example Construction

[0021] The preparation method of the lithium-ferrous disulfide disposable button battery of the present invention, as shown in the figure, the button battery includes: a button type positive electrode shell 1 and a button type negative electrode cover 5, the shell has a positive electrode 2 and a negative electrode 4, and the positive electrode 2 There is a separator 3 between the negative electrode 4 and the negative electrode 4, which is characterized in that the positive electrode active material is ferrous disulfide; the negative electrode active material is lithium.

[0022] In the present invention, a positive electrode current collector is fixed on the side surface of the positive electrode 2 against the button-type positive electrode shell 1; a negative electrode current collector is fixed on the inner side of the button-type negative electrode cover 5; the current collector is in a mesh shape. Or in the present invention, a conductive coating is respectively coated on the...

Embodiment 1

[0036] The positive active material is ferrous disulfide (FeS 2 ), the conductive agent can be acetylene black or ultra-fine conductive graphite, and then add polymer polytetrafluoroethylene (PTFE) emulsion or sodium carboxymethyl cellulose (CMC) aqueous solution and organic solvent ethanol or acetone to form a positive electrode mixture, and stamp it into Circular pie-shaped positive electrode of specified size. Then it is vacuum-baked and dried at a baking temperature of 80-120°C and a baking time of 4-12 hours. Positive active material ferrous disulfide (FeS 2 ), the dosage is 93%; the amount of conductive agent acetylene black or ultrafine conductive graphite is 4% of the weight of the dried positive electrode mixture; polymer polytetrafluoroethylene (PTFE) emulsion or sodium carboxymethyl cellulose (CMC) The solid content of the aqueous solution is 3% of the weight of the dried positive electrode mixture; the amount of the organic solvent ethanol or acetone is 10% of the weig...

Embodiment 2

[0038] The positive active material is ferrous disulfide (FeS 2 ), the conductive agent can be acetylene black or ultra-fine conductive graphite, and then add polymer polytetrafluoroethylene (PTFE) emulsion or sodium carboxymethyl cellulose (CMC) aqueous solution and organic solvent ethanol or acetone to form a positive electrode mixture, and stamp it into Circular pie-shaped positive electrode of specified size. Then it is vacuum-baked and dried at a baking temperature of 80-120°C and a baking time of 4-12 hours. Positive active material ferrous disulfide (FeS 2 ), the amount used is 89%; the amount of conductive agent acetylene black or ultrafine conductive graphite is 7% of the weight of the dried positive electrode mixture; polymer polytetrafluoroethylene (PTFE) emulsion or sodium carboxymethyl cellulose (CMC) The solid content of the aqueous solution is 4% of the weight of the dried positive electrode mixture; the amount of the organic solvent ethanol or acetone is 5% of the ...

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PUM

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Abstract

The one-use Li-FeS2 button cell comprises: a button positive electrode shell, a button negative electrode cover, a membrane between positive and negative electrode, a web positive collector fixed on side surface of positive electrode near the shell, a web negative collector fixed on inner side of negative cover, or a conductive coating on positive shell and negative cover, respectively. Wherein, the components with weight share in positive electrode comprises: 86~95% FeS2, 2~8% acetylene black or ultrathin conductive graphite as conductive agent, and 3~6% teflon or SCMC. The advantages of this invention include: portable, high capacity, high discharge platform, high specific energy, low cost, and environmental friend.

Description

Technical field [0001] The invention relates to a method for preparing a button battery that uses chemical energy to convert electrical energy, in particular to a method that uses lithium (Li) as a negative electrode and ferrous disulfide (FeS 2 ) A method for preparing lithium-ferrous disulfide disposable button batteries whose powder is a positive electrode. Background technique [0002] 1.5V primary Zn-AgO common on the market 2 Button cell and alkaline Zn-MnO 2 Button battery. Zn-AgO 2 Button battery has low specific energy and high cost. The capacity of SR927 is about 40mAh. Basic Zn-MnO 2 Button batteries contain mercury that pollutes the environment, making it difficult to survive in the international market for a long time. [0003] The patent application with the application number 200410025777.X and the invention name "Lithium-ion battery for portable electronic equipment" discloses a lithium-ion battery for portable electronic equipment, inclu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/38H01M4/06H01M6/16
CPCY02E60/12
Inventor 李青海
Owner SHANDONG GOLDENCELL ELECTRONICS TECH