A laser ablation and oxidation in-situ preparation method of an integrated negative electrode of a lithium-ion battery

An in-situ preparation technology for lithium-ion batteries, which is applied in the field of laser ablation and oxidation in-situ preparation of lithium-ion battery integrated negative electrodes, can solve problems such as expensive equipment, high manufacturing costs, and complicated preparation processes, and achieve loose and porous structures. Relieves the effect of large volume change and high specific surface area

Active Publication Date: 2019-07-12
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, electrodeposition, chemical vapor deposition or hydrothermal method are used to prepare integrated negative electrode materials in situ on metal current collectors, but all these methods will have problems of one kind or another, such as requiring expensive equipment, complicated preparation processes and High manufacturing costs, etc., limit its large-scale application in the actual lithium battery industry

Method used

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  • A laser ablation and oxidation in-situ preparation method of an integrated negative electrode of a lithium-ion battery
  • A laser ablation and oxidation in-situ preparation method of an integrated negative electrode of a lithium-ion battery
  • A laser ablation and oxidation in-situ preparation method of an integrated negative electrode of a lithium-ion battery

Examples

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Embodiment 1

[0023] A laser ablation and oxidation in-situ preparation method for an integrated negative electrode of a lithium ion battery, comprising the following steps:

[0024] 1) Ultrasonic cleaning the metal foil with alcohol and deionized water for 30 minutes to remove impurities on the surface; the metal foil is made of copper with a purity of more than 99.99% and a thickness of 100 μm;

[0025] 2) At room temperature and air atmosphere, use nanosecond pulsed laser to scan and irradiate the metal foil respectively. The laser wavelength is 532nm, the pulse frequency is 30000Hz, the pulse width is 10ns, and the single pulse energy is 1.5×10 -4 J, laser scanning speed 25mm s -1 , the laser is perpendicular to the metal foil to obtain a metal oxide-metal integrated negative electrode;

[0026] 3) Put the metal oxide-metal integrated negative electrode into a vacuum oven and dry at 60°C for 6 hours;

[0027]4) Soak the dried metal oxide-metal integrated negative electrode in a mixed ...

Embodiment 2

[0035] A laser ablation and oxidation in-situ preparation method for an integrated negative electrode of a lithium ion battery, comprising the following steps:

[0036] 1) Ultrasonic cleaning the metal foil with acetone and deionized water for 30 minutes to remove impurities on the surface; the metal foil is made of iron with a purity of more than 99.99% and a thickness of 100 μm;

[0037] 2) At room temperature and air atmosphere, use nanosecond pulsed laser to scan and irradiate the metal foil respectively. The laser wavelength is 532nm, the pulse frequency is 20000Hz, the pulse width is 10ns, and the single pulse energy is 1.5×10 -4 J, laser scanning speed 15mm s -1 , the laser is perpendicular to the metal foil to obtain a metal oxide-metal integrated negative electrode;

[0038] 3) Put the metal oxide-metal integrated negative electrode into a vacuum drying oven for 8 hours at 90°C;

[0039] 4) Soak the dried metal oxide-metal integrated negative electrode in a mixed so...

Embodiment 3

[0043] A laser ablation and oxidation in-situ preparation method for an integrated negative electrode of a lithium ion battery, comprising the following steps:

[0044] 1) Ultrasonic cleaning the metal foil with alcohol and deionized water for 30 minutes to remove impurities on the surface; the metal foil is made of nickel with a purity of over 99.99% and a thickness of 100 μm;

[0045] 2) At room temperature and air atmosphere, use nanosecond pulse laser to scan and irradiate the metal foil respectively. The laser wavelength is 532nm, the pulse frequency is 10000Hz, the pulse width is 10ns, and the single pulse energy is 1.5×10 -4 J, laser scanning speed 20mm s -1 , the laser is perpendicular to the metal foil to obtain a metal oxide-metal integrated negative electrode;

[0046] 3) Put the metal oxide-metal integrated negative electrode into a vacuum drying oven to dry at 80°C for 10 hours;

[0047] 4) Soak the dried metal oxide-metal integrated negative electrode in a mixe...

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Abstract

Disclosed is a laser ablation oxidization in-situ preparation method for an integrated negative electrode of a lithium ion battery. A metal foil sheet is subjected to ultrasonic cleaning by ethyl alcohol or acetone and deionized water separately; in the atmosphere of air at the room temperature, the metal foil sheet is scanned and irradiated by nanosecond pulse laser, wherein the laser is perpendicular to the metal foil sheet to obtain a metal oxide-metal integrated negative electrode; next, the metal oxide-metal integrated negative electrode is placed into a vacuum drying oven to be dried; and finally, the dried metal oxide-metal integrated negative electrode is immersed in a mixed solution of tetrabutyl titanate and absolute ethyl alcohol, and next the negative electrode is subjected to natural hydrolysis in the air and dried in the drying oven to obtain the modified metal oxide-metal integrated negative electrode. When the modified metal oxide-metal integrated negative electrode is used as the negative electrode material of the lithium ion battery, excellent charging-discharging high cycling stability and excellent electrochemical performance are shown; and in addition, the laser ablation oxidization in-situ preparation method has the advantages of simplicity, high efficiency and low cost.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a laser ablation and oxidation in-situ preparation method of an integrated negative electrode of a lithium ion battery. Background technique [0002] With the increasing demand for mobile electronic devices and Li-ion batteries, several issues have gradually emerged in the efficient and low-cost fabrication of Li-ion battery anodes. For example, commercialized graphite anodes have been increasingly limited due to their low theoretical capacity and complicated fabrication processes. Therefore, it is very necessary and a great challenge to develop efficient preparation methods for lithium-ion battery anodes and to develop advanced anode materials. In recent years, transition metal oxides such as Cu 2 O / CuO,Fe 2 o 3 and NiO, etc., have received increasing attention due to their high theoretical capacity, low cost, and wide distribution of reserves. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/131H01M4/1391H01M4/36H01M4/485H01M4/525H01M10/0525
CPCH01M4/0471H01M4/131H01M4/1391H01M4/366H01M4/485H01M4/525H01M10/0525Y02E60/10
Inventor 汪长安梁芃苏一博钟敏霖张红军
Owner TSINGHUA UNIV
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