Lithium ion battery pentabasic high-entropy oxide nano-film as well as preparation and application thereof

A lithium-ion battery and nano-film technology, which is applied in the field of lithium-ion battery five-element high-entropy oxide nano-film and its preparation and application, can solve the problems of volume expansion, poor cycle stability, and low charge-discharge specific capacity.

Active Publication Date: 2018-05-04
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortcomings of traditional unit metal oxide anode materials such as low charge-discharge specific capacity, poor cycle stability, and volume expansion during lithium intercalation and delithiation, the present invention designed and synthesized a five-element high-entropy oxide, and adopted laser molecular beam epitaxy deposition technology Nanoscale high-entropy oxide thin films were prepared

Method used

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  • Lithium ion battery pentabasic high-entropy oxide nano-film as well as preparation and application thereof
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  • Lithium ion battery pentabasic high-entropy oxide nano-film as well as preparation and application thereof

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Embodiment 1

[0028] Adopt laser molecular beam epitaxy deposition technology to prepare high-entropy oxide (Mg 0.2 co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 )O thin film: According to the molar ratio (0.2 / 0.2 / 0.2 / 0.2 / 0.2), magnesium oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide are high-energy ball milled for 10-15 hours, mixed evenly and pressed into tablets to make laser molecules The target used for beam epitaxy deposition, the 1064nm fundamental frequency generated by the neodymium-doped yttrium aluminum garnet laser is tripled to obtain a 355nm pulsed laser, the laser beam is incident on the above-mentioned target after being focused by the lens, the target and the substrate The distance is 30mm, high vacuum (1.0×10 -6 (Mg 0.2 co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 )O thin film, in which the substrate is made of high-purity platinum, and the substrate temperature is 700°C.

[0029] The deposition time of the film is determined by the film thickness requirements, generally 1 to 2 hou...

Embodiment 2

[0033] Adopt laser molecular beam epitaxy deposition technology to prepare high-entropy oxide (Mg 0.25 co 0.15 Ni 0.2 Cu 0.2 Zn 0.2 )O thin film: According to the molar ratio (0.25 / 0.15 / 0.2 / 0.2 / 0.2), magnesium oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide are high-energy ball milled for 10-15 hours, mixed evenly and pressed into tablets to make laser molecules The target used for beam epitaxy deposition, the 1064nm fundamental frequency generated by the neodymium-doped yttrium aluminum garnet laser is tripled to obtain a 355nm pulsed laser, the laser beam is incident on the above-mentioned target after being focused by the lens, the distance between the target and the substrate 20mm, in high vacuum 1.0×10 -6 Deposited on the substrate under Pa (Mg 0.25 co 0.15 Ni 0.2 Cu 0.2 Zn 0.2 )O thin film, wherein the substrate is made of stainless steel, and the temperature of the substrate is 600°C.

[0034] The deposition time of the film is determined by the...

Embodiment 3

[0038] Adopt laser molecular beam epitaxy deposition technology to prepare high-entropy oxide (Mg 0.2 co 0.2 Ni 0.3 Cu 0.15 Zn 0.15 )O thin film: According to the molar ratio (0.2 / 0.2 / 0.3 / 0.15 / 0.15), magnesium oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide are milled for 10-15 hours by high-energy ball milling, and the laser molecules are made into tablets after mixing evenly The target used for beam epitaxy deposition, the 1064nm fundamental frequency generated by the neodymium-doped yttrium aluminum garnet laser is tripled to obtain a 355nm pulsed laser, the laser beam is incident on the above target after being focused by the lens, the target and the substrate The distance is 40mm, the high vacuum degree is 1.0×10 -6 Deposited on the substrate under Pa (Mg 0.2 co 0.2 Ni 0.3 Cu 0.15 Zn 0.15 ) O thin film, wherein the substrate is a gold-plated single crystal silicon wafer, and the substrate temperature is 500 °C.

[0039] The deposition time of the ...

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Abstract

The invention discloses a lithium ion battery pentabasic high-entropy oxide nano-film as well as preparation and application thereof. The used initial raw materials comprise magnesium oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide, wherein the molar ratio of the magnesium oxide to the cobalt oxide to the nickel oxide to the copper oxide to the zinc oxide is (2-2.5):(1.5-2):(2-3):(1.5-2):(1.5-2). The pentabasic high-entropy oxide film is prepared in the following steps: performing high-energy ball milling on the oxide, uniformly mixing to prepare a target material for laser molecular beam epitaxial deposition, focusing pulse laser generated by a laser through a lens, entering the target material and performing deposition. The pentabasic high-entropy oxide nano-film is applied to a negative electrode material of the lithium ion battery and has excellent circulating characteristic and high stability. The preparation method has the characteristics of simple process, low cost and no pollution.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries in electrochemistry, and relates to a negative electrode material for lithium ion batteries, in particular to a lithium ion battery five-element high-entropy oxide nano film and its preparation and application. Background technique [0002] Lithium-ion batteries are currently widely used in people's work and life, such as portable electronic products such as mobile phones, digital cameras and notebook computers, electric vehicles, and large-scale energy storage equipment. An important factor affecting the performance of lithium-ion batteries is their electrode materials. At present, the negative electrode materials of commercial lithium-ion batteries generally use graphite. The structure of graphite is stable, and it has a stable reversible capacity in the charge-discharge cycle. However, the theoretical specific capacity of the graphite anode material is only 372mAh / g, which is difficul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/525Y02E60/10
Inventor 崔艳华陈鸿汪渊赵宇崔益秀张小强胡守亮魏华陈勇
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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