Lithium aluminum alloy for secondary lithium battery and manufacturing method thereof

A secondary lithium battery, lithium-aluminum alloy technology, applied in the field of chemical power storage, can solve the problem of no electrochemical performance synthesis process development and other problems, achieve strong lithium ion supply capacity, reduce polarization, easy to operate and control. Effect

Inactive Publication Date: 2011-07-20
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

[0008] The current lithium-aluminum alloy technology mainly focuses on the composition of the alloy and the uniform

Method used

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  • Lithium aluminum alloy for secondary lithium battery and manufacturing method thereof

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Comparison scheme
Effect test

Embodiment 1

[0018] In dry air with a relative humidity below 0.5%, put 11g of lithium particles with a diameter of 1mm and a purity of 99.5% and 89g of metallic aluminum particles with a diameter of 0.04mm and a purity of 99.9% into a 500ml ceramic grinding jar, and add 10 diameter 20mm corundum balls, then cover the lid, fill with 99.99% argon, install it on a ball mill and mill it at a speed of 20 rpm for 10 hours, stop the ball milling and take out the mixture, pick out the corundum balls, take 60mg of the mixture and pour it into the inner diameter In a mold with a diameter of 9.4mm, pressurize the powder with a pressure of 5Mpa on the hydraulic press, then remove the mold, take out the cake with a thickness of 0.4mm and a diameter of 9.4mm, and then put the cake into the grinding mouth wide Mouth bottle, add 1M LiClO Electrolyte in 1:3 (mass ratio) PC and DME, seal and soak for 56 hours, take out and wash 3 times with analytical pure DMC, dry to obtain lithium aluminum alloy.

[0019...

Embodiment 2

[0023] In dry air with a relative humidity below 2%, put 20g of lithium particles with a diameter of 1mm and a purity of 99.1% and 80g of metallic aluminum particles with a diameter of 0.1mm and a purity of 99.9% into a 500ml ceramic grinding jar, and add 10 diameter 20mm corundum balls, then cover the lid, fill with 99.99% argon, put it on a ball mill and mill it at a speed of 50 rpm for 3 hours, stop the ball milling and take out the mixture, pick out the corundum balls, take 60mg of the mixture and pour it into the inner diameter In a mold with a diameter of 9.4mm, pressurize the powder with a pressure of 5Mpa on the hydraulic press, then remove the mold, take out the cake with a thickness of 0.4mm and a diameter of 9.4mm, and then put the cake into the grinding mouth wide Mouth bottle, add 1M LiPF6 electrolyte solution in 1:3 (mass ratio) PC and DME, seal and soak for 206 hours, take out and wash 3 times with analytical pure PC, dry to obtain lithium aluminum alloy.

Embodiment 3

[0025] In dry air with a relative humidity below 1%, put 15g of lithium particles with a diameter of 1mm and a purity of 99.4% and 85g of metallic aluminum particles with a diameter of 0.08mm and a purity of 99.9% into a 500ml ceramic grinding jar, and add 10 diameter 20mm corundum balls, then cover the lid, let in 99.99% argon gas, install it on a ball mill and mill it at a speed of 100 rpm for 30 minutes, stop the ball milling and take out the mixture, pick out the corundum balls, take 50mg of the mixture and pour it into the inner diameter In a mold with a diameter of 9.4mm, pressurize the powder with a pressure of 5Mpa on the hydraulic press, then remove the mold, take out the cake with a thickness of 0.4mm and a diameter of 9.4mm, and then put the cake into the grinding mouth wide Add 1M LiBF4 electrolyte solution in 1:3 (mass ratio) EC and DMC, seal and soak for 206 hours, take it out and wash it with analytical pure PC for 10 times, blow dry to obtain lithium aluminum al...

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Abstract

The invention provides a lithium aluminum alloy for a secondary lithium battery and a manufacturing process method thereof. The lithium aluminum alloy comprises 11 to 20 mass percent of lithium and 80 to 89 mass percent of aluminum. The method comprises the following steps of: placing a demand quantity of metal lithium particles and metal aluminum particles in a certain proportion into a ceramic ball milling jar in dry air at the relative humidity of less than 2 percent; adding a certain number of corundum balls; introducing inert gas, namely argon; performing ball milling for 30 minutes to 10 hours; taking a mixture out; picking the corundum balls out; filling mixed powder into a mould; pressing on an oil press to obtain cake-shaped objects with required thickness and diameter, wherein the thickness and the diameter of the cake-shaped objects are determined according to the size required by a negative electrode of the secondary lithium battery; placing the cake-shaped objects in organic electrolyte for the secondary lithium battery; standing for 20 to 56 hours; taking the cake-shaped objects out; and cleaning with carbonic allyl ester or dimethyl carbonate to obtain the lithium aluminum alloy. The method has a simple process and low energy consumption and is easy to operate and control; the synthesized lithium aluminum alloy is suitable to be used as the negative electrode ofthe secondary lithium battery; and the discharge performance of the battery can be improved, and the cycle life of the battery can be prolonged.

Description

technical field [0001] The invention discloses a lithium aluminum alloy for a secondary lithium battery and a manufacturing method thereof, belonging to the technical field of chemical power source energy storage. Background technique [0002] The development of electronic technology requires the miniaturization of electronic components. Primary lithium batteries widely used in mobile phones, GPS (Personal Positioning System) navigators, and computers are increasingly unable to meet market requirements, because they need to be replaced regularly, which increases the maintenance cost of the equipment and increases the volume of the product. For example, the primary lithium manganese dioxide battery used on the motherboard of a personal computer generally ends its life in 5-6 years, and the power consumption will be exhausted in 1-2 years when the power consumption is high. The consumption of a large amount of primary lithium batteries will also bring about environmental poll...

Claims

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Application Information

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IPC IPC(8): C22C1/04C25C3/02
Inventor 郝德利叶丽光
Owner 天津赫维科技有限公司
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