1.5V lithium iron disulfide button cell with metal framework positive pole

A metal skeleton and button battery technology, which is applied in the direction of organic electrolyte batteries, secondary batteries, battery electrodes, etc., can solve problems affecting battery performance, achieve the effects of improving overall quality, enhancing stability, and expanding the scope of application

Inactive Publication Date: 2008-06-18
SHANDONG SHENGONGHAITE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, previous lithium-iron disulfide button batteries have problems with swelling during discharge, which affects the performance of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Mix 50g of iron disulfide powder and 50g of graphite powder evenly, then add 100g of polyethylene oxide aqueous solution with a mass concentration of 20%, stir it with a glass rod to form a slurry, and then spread the slurry on a surface of 10cm×10cm×2mm with a porosity of 83 % on the foamed nickel, apply it repeatedly with a horn spoon, so that the slurry is fully filled in the gaps of the foamed nickel, and then put the foamed nickel in a vacuum oven at 150°C, 1KPa, dry for 12 hours, take it out, Use a tablet press to press the foamed nickel to a thickness of 1mm, then cut it into a round cake of φ2.2mm, put it in a vacuum oven at 150°C and 1KPa, dry it for 12 hours, and transfer it to a dry environment with a relative humidity of ≤1%. , as the positive electrode. Put the φ2.2mm lithium cake with a thickness of 0.5mm into the stainless steel shell, put the glass fiber diaphragm on it, put the positive electrode on the diaphragm, add 0.5g 1MLiCiO 4 In the electrolyte ...

Embodiment 2

[0011] Mix 80g of natural iron disulfide powder and 20g of graphite powder evenly, then add 100g of acrylate aqueous solution with a mass concentration of 15%, stir it with a glass rod to form a slurry, and then spread the slurry on a surface of 10cm×10cm×2mm with a porosity of 45 % on the foamed copper, apply it repeatedly with a horn spoon, so that the slurry is fully filled in the gap of the foamed copper, and then put the foamed copper in a vacuum oven at 150°C, dry for 12 hours, take it out, and press it with a tablet Machine-foamed copper is pressed to a thickness of 1mm, then cut into a round cake of φ6.2mm, placed in a vacuum oven at 150°C, dried for 12 hours, transferred to a dry environment with a relative humidity of ≤1%, and used as the positive electrode. Put φ6.2mm, thickness 0.8mm lithium aluminum alloy cake (Li: 98%wt, Al: 2%wt) into the stainless steel shell, put the glass fiber diaphragm on it, put the positive electrode on the diaphragm, add 3.5g 1M LiI in t...

Embodiment 3

[0013] Mix 70g of artificially synthesized iron disulfide powder and 30g of copper powder evenly, then add 100g of polytetrafluoroethylene emulsion with a mass concentration of 5%, stir it with a glass rod to form a slurry, and then spread the slurry on a sintering surface of 10cm×10cm×2mm On the stainless steel, apply it repeatedly with a horn spoon, so that the slurry is fully filled into the gap of the sintered stainless steel with a porosity of 60%, and then put the sintered stainless steel in a vacuum oven at 150°C, dry for 12 hours, take it out, and press it with a tablet Press the sintered stainless steel to a thickness of 1mm, then cut it into a φ8.2mm round cake, put it in a vacuum oven at 150°C, dry it for 12 hours, transfer it to a dry environment with a relative humidity of ≤1%, and use it as the positive electrode. Put φ8.0mm, thickness 1mm lithium-aluminum alloy cake (Li: 98%wt, Al: 2%wt) into the nickel-plated iron shell, put the glass fiber diaphragm on it, put ...

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PUM

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Abstract

The invention discloses a 1.5V lithium iron disulfide button battery with a metal framework anode. The button battery comprises a metal shell in two-half type. A septum and filling electrolyte are arranged inside the shell; two sides of the septum are provided with an anode and a cathode respectively; the septum is polypropylene and polythene film with micropores, or composite film of the polypropylene and the polythene, or polypropylene felt, or paper film with fibers or glass fiber septum. The anode consists of a current collector and an anode material which is filled in the current collector; the metal framework comprises foaming nickel, fiber nickel, foaming iron, foaming copper, foaming aluminium, foaming titanium or sintered stainless steel; the anode material consists of iron disulfide, conductive agent and binder; the cathode is metal lithium, lithium aluminium alloy or lithium silicon alloy; the electrolyte is prepared by lithium salt which is dissolved in organic solution. The invention has the advantages of restraining the expansion problem which is generated in the discharging process of the battery, simple processes and being suitable for large-scale industrial production.

Description

technical field [0001] The invention discloses a 1.5V lithium iron disulfide button battery with a metal skeleton positive electrode, which belongs to the innovation of chemical energy storage technology. Background technique [0002] In recent years, with the development of electronic technology and the world's increasing emphasis on environmental protection, higher requirements have been put forward for chemical power sources. At present, the mainstream 1.5V button batteries in the market are divided into two series. One series is zinc-manganese button batteries. it is good. Another series is silver-zinc button battery, although the capacity of this battery is more than 30% higher than that of zinc-manganese, but because its positive electrode is made of silver oxide, it is expensive. Silver-zinc button cells and zinc-manganese button cells generally contain mercury. Since button batteries are widely used in watches, sports shoes, calculators, instruments and other elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M6/16H01M10/40H01M4/58H01M50/417H01M50/437
CPCH01M4/46H01M2/162H01M4/669H01M4/06H01M4/661H01M2/0222H01M4/624H01M4/80H01M4/808H01M4/38H01M4/581H01M4/621H01M2/1613H01M6/16H01M4/40H01M50/109H01M50/44H01M50/417H01M50/437
Inventor 李青海郝德利
Owner SHANDONG SHENGONGHAITE ELECTRONICS TECH
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