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Chargeable 3V button-type lithium battery

A button battery, lithium battery technology, applied in lithium batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of destroying negative electrodes, battery failure, and inability to form batteries with lithium aluminum alloy negative electrodes, so as to prolong cycle life and reduce battery life. The effect of battery cost, excellent cycle life

Inactive Publication Date: 2012-07-25
天津赫维科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordinary lithium iron phosphate material itself is in a lithium-rich state, that is, in a discharge state, and cannot directly form a battery with a lithium-aluminum alloy negative electrode. Otherwise, metal lithium deposits will be formed on the negative electrode during battery charging and the negative electrode will be destroyed, resulting in battery failure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The battery-grade LiFePO 4 Mix 90g of powder, 5g of flake graphite powder, and 2g of conductive carbon black Super-Li, then add 20g of acrylate aqueous solution with a mass concentration of 15%, stir with a glass rod to form a slurry, and then use a scraper to spread the slurry on a surface of 10cm×10cm× 16um aluminum foil, then put the aluminum foil in a blast oven at 110°C, dry for 12 hours, take it out, press the aluminum foil to a thickness of 0.5mm with a tablet machine, then cut it into a round cake of φ6mm, and put it in 150°C, Dry in a -0.1MPa vacuum oven for 12 hours, transfer to a dry environment with a relative humidity of ≤1%, and use it as a positive electrode. Put the φ6.2mm, thickness 0.4mm lithium cake into the stainless steel shell, place a φ6.4mm, thickness 70um polypropylene felt diaphragm on top, put the positive electrode on the diaphragm, add 0.8g 1M LiPF 6 In the 1:3 ratio of PC and DME electrolyte, cover the other half of the stainless steel cas...

Embodiment 2

[0011] Will Li 0 3 FePO 4 Mix powder 90 and graphite powder 5g evenly, then add 25g of polyethylene oxide aqueous solution with a mass concentration of 20%, stir with a glass rod to form a slurry, and then spread the slurry evenly on 10cm×10cm×20um aluminum foil, then put the aluminum foil on the Put it into a blast oven at 150°C, dry it for 12 hours, take it out, press it to a thickness of 0.9mm with a tablet press, then cut it into a round cake of φ9mm, put it in a vacuum oven at 150°C, -0.1MPa, and dry it. Dry for 12 hours, transfer to a dry environment with a relative humidity of ≤1%, and use it as a positive electrode. Put φ10mm, thickness 0.5mm lithium aluminum alloy (Li 0.4 Al) piece into the stainless steel shell, put a φ11mm, 50um thick polyethylene composite diaphragm (China) on it, then put the positive electrode on the diaphragm, make the positive electrode material contact the diaphragm, and then add 1g 1MLiCiO 4 In the electrolyte of 1:3 PC and DME, cover the ...

Embodiment 3

[0013] The battery-grade LiFePO 4 Put 80g of powder, 8g of flake graphite powder, and 3g of conductive carbon black Super-Li into a beaker and mix evenly, add 30g of absolute ethanol, stir with a glass rod to form a slurry, then add 9g of 60% PTFE emulsion, and keep stirring with a glass rod Stir until the slurry becomes a paste and does not stick to the walls of the beaker. Take out the paste and repeatedly roll it into a diaphragm on a double-roller machine until the thickness is 0.7mm, then put it in a blast oven at 110°C, dry it for 12 hours, take it out, cut it into a round cake of φ18mm, and put it Put it into a 150°C, -0.1MPa vacuum oven, dry it for 12 hours, transfer it to a dry environment with a relative humidity of ≤1%, and use it as a positive electrode. Put the φ20mm, thickness 0.9mm lithium cake into the stainless steel shell, place a φ22mm, thickness 50um paper fiber separator (NKK, Japan) on it, put the positive electrode on the separator, add 3g 1M LiPF 6 In...

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PUM

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Abstract

The invention discloses a chargeable 3V button-type lithium battery with a lithium ferrous phosphate positive electrode. The chargeable 3V button-type lithium battery comprises two half type metal shells, a diaphragm and a filling electrolyte are arranged in each shell, a positive electrode and a negative electrode are respectively arranged on two sides of each diaphragm, each diaphragm is a cellular polypropylene and polyethylene film or a composite film of combined both or a polypropylene felt or a fibrous paper film; the positive electrode is made of a current collector and a positive electrode material, the current collector is a stainless steel wire, and the positive electrode material consists of lithium-lack type lithium ferrous phosphate, an electric conducting agent and an adhesive; and a negative electrode is lithium aluminum alloy, and the electrolyte is prepared by dissolving lithium salt in an organic solution. The chargeable 3V button-type lithium battery disclosed by the invention has the advantages of high capacity, small self discharge, strong deep discharge capability, long service life and the like, and is an ideal substitute product of the 3V button-type chargeable lithium battery with manganese dioxide as the positive electrode.

Description

technical field [0001] The invention discloses a rechargeable 3V button lithium battery with a lithium iron phosphate positive electrode, which belongs to the innovation of chemical energy storage technology. Background technique [0002] Rechargeable 3V button lithium batteries are an important battery type, mainly used in electronic circuit boards as backup power for data memory, widely used in notebook computers, mobile phones, GPS navigators and other products. At present, this kind of battery mainly uses lithiated manganese dioxide as the positive electrode active material, and lithium aluminum alloy as the negative electrode active material, which has the advantages of high capacity and small self-discharge, but also has the disadvantages of short service life, poor deep discharge ability and high cost. . The development trend of miniaturization and maintenance-free electronic products urgently requires the development of a rechargeable 3V button lithium battery with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M4/58
CPCY02E60/122Y02E60/10
Inventor 郝德利叶丽光
Owner 天津赫维科技有限公司
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