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Lanthanum lithium aluminum alloy

A technology for aluminum alloys and preparation steps, which is applied in the field of lithium-lanthanum aluminum alloys, can solve problems such as lithium dendrite fire or explosion, and achieve the effects of improving stability, reducing non-Faraday reactions, and preventing fire or explosion

Inactive Publication Date: 2017-06-09
FOSHAN SHANGHAO DOOR & WINDOW CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The original lithium battery used lithium metal as the negative electrode material, but lithium metal is prone to generate lithium dendrites during charging and discharging, which can cause fire or explosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A lithium-lanthanum aluminum alloy, characterized in that it comprises the following components in parts by weight: 94 parts of lithium, 3 parts of lanthanum, and 3 parts of aluminum.

[0025] A lithium lanthanum aluminum alloy comprising the following manufacturing steps:

[0026] (1) Weigh various raw materials by weight, mix them evenly, put them into the melting furnace, and heat up.

[0027] (2) When the temperature reaches 200°C, an inert gas is introduced.

[0028] (3) When the temperature reaches 310°C, add smelting aids, clean up scum, and keep warm for 1 hour.

[0029] (4) After the heat preservation is completed, the temperature is lowered to 180°C, and pouring is performed. After the pouring is completed, it is cooled to room temperature, and the mold is demoulded to obtain lithium lanthanum aluminum alloy.

[0030] The inert gas used is argon, and its nitrogen and oxygen content is less than or equal to 10ppm. .

[0031] The smelting aid used is a mixtu...

Embodiment 2

[0033] A lithium-lanthanum aluminum alloy, characterized in that it comprises the following components in parts by weight: 90 parts of lithium, 5 parts of lanthanum, and 5 parts of aluminum.

[0034] A lithium lanthanum aluminum alloy comprising the following manufacturing steps:

[0035] (1) Weigh various raw materials by weight, mix them evenly, put them into the melting furnace, and heat up.

[0036] (2) When the temperature reaches 200°C, an inert gas is introduced.

[0037] (3) When the temperature reaches 310°C, add smelting aids, clean up scum, and keep warm for 1 hour.

[0038] (4) After the heat preservation is completed, the temperature is lowered to 180°C, and pouring is performed. After the pouring is completed, it is cooled to room temperature, and the mold is demoulded to obtain lithium lanthanum aluminum alloy.

[0039] The inert gas used is argon, and its nitrogen and oxygen content is less than or equal to 10ppm. .

[0040] The smelting aid used is a mixtu...

Embodiment 3

[0042] A lithium-lanthanum aluminum alloy, characterized in that it comprises the following components in parts by weight: 92 parts of lithium, 4 parts of lanthanum, and 4 parts of aluminum.

[0043] A lithium lanthanum aluminum alloy comprising the following manufacturing steps:

[0044] (1) Weigh various raw materials by weight, mix them evenly, put them into the melting furnace, and heat up.

[0045] (2) When the temperature reaches 200°C, an inert gas is introduced.

[0046] (3) When the temperature reaches 310°C, add smelting aids, clean up scum, and keep warm for 1 hour.

[0047] (4) After the heat preservation is completed, the temperature is lowered to 180°C, and pouring is performed. After the pouring is completed, it is cooled to room temperature, and the mold is demoulded to obtain lithium lanthanum aluminum alloy.

[0048] The inert gas used is argon, and its nitrogen and oxygen content is less than or equal to 10ppm. .

[0049] The smelting aid used is a mixtu...

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PUM

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Abstract

The invention relates to the field of lithium battery materials and in particular relates to a lanthanum lithium aluminum alloy. A lithium ion battery cathode material is an important composition of a lithium ion battery. Composition and structure of the cathode material have conclusive influences on the electrochemical property of the lithium ion battery. From the brief history of development of the lithium ion battery, the lithium ion battery enters a commercial stage due to development of the cathode material. The initial lithium battery uses a metal lithium as the cathode material but the metal lithium is likely to generate lithium dendritic crystals in charging and discharging to lead to a fire or explosion. The invention provides the lanthanum lithium aluminum alloy which comprises the following components in parts by weight: 90-100 parts of lithium, 2-5 parts of lanthanum and 2-5 parts of aluminum. By adding the elements aluminum and lanthanum into the metal lithium, fire or explosion caused by lithium dendritic crystals can be effectively prevented. The metal lithium in an electrolyte has obvious excellent stability, non-faradaic reaction between the lithium and the electrolyte is reduced to a great extent, and meanwhile, an SEI membrane is more uniform, so that the stability of a metal lithium electrode is improved.

Description

[0001] Technical field: [0002] The invention relates to the field of lithium battery materials, in particular to a lithium-lanthanum aluminum alloy. [0003] technical background: [0004] Lithium is a silver-white metal with light texture, good ductility, strong conductivity, very active electrochemical properties, strong reducibility, and its electrochemical equivalent is very small, 0.259g / Ah. The theoretical ratio of lithium electrodes is The capacity is 3860Ah / kg, which far exceeds 820Ah / kg of zinc, 260Ah / kg of lead and 481Ah / kg of cadmium. At the same time, the exchange current density of the lithium electrode is relatively large, and only a small polarization occurs in the electrode reaction. [0005] Lithium-ion battery anode materials are an important part of lithium-ion batteries, and the composition and structure of anode materials have a decisive impact on the electrochemical performance of lithium-ion batteries. From the brief history of the development of lith...

Claims

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Application Information

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IPC IPC(8): H01M4/134H01M4/1395H01M4/46
CPCH01M4/134H01M4/1395H01M4/382Y02E60/10
Inventor 刘正英
Owner FOSHAN SHANGHAO DOOR & WINDOW CO LTD
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