Method for preparing lithium ion battery negative electrode material by combining CVD with MAO

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve problems such as shedding and low charge and discharge capacity of titanium dioxide electrode materials, achieve good stability, overcome irreversible entry The effect of lift-off, cycle stability, and rate performance improvement

Pending Publication Date: 2020-06-05
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low charge and discharge capacity of titanium dioxide electrode material and easy to fall off from the current collector, and to provide a method for preparing lithium ion battery negative electrode material by combining CVD with MAO

Method used

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  • Method for preparing lithium ion battery negative electrode material by combining CVD with MAO
  • Method for preparing lithium ion battery negative electrode material by combining CVD with MAO
  • Method for preparing lithium ion battery negative electrode material by combining CVD with MAO

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specific Embodiment approach 1

[0023] Specific embodiment one: what this embodiment records is a kind of method that CVD combines MAO to prepare lithium-ion battery anode material, such as figure 1 As shown, the method is:

[0024] S1: Cut the TA1 titanium foil to the specified size, grind it with 200#, 400#, 600#, and 1000# sandpaper respectively until the direction of the grinding marks is consistent, then ultrasonically clean it for 30-60 minutes, and put the cleaned TA1 titanium foil in a blast drying box Dry in medium temperature and store for later use;

[0025] S2: CuCl 2 ·H 2 O was dried and dehydrated to obtain CuCl 2 powder, put it and TA1 titanium foil substrate in a quartz tube and put it in a program-controlled box furnace, pass inert gas protection, and pass H2 when the reaction temperature reaches 850 °C 2 After depositing copper, take out the TA1 titanium foil with furnace cooling; this step uses CVD technology to deposit a layer of copper on the TA1 titanium foil as a current collector,...

specific Embodiment approach 2

[0028] Embodiment 2: In Embodiment 1, a method for preparing a negative electrode material of a lithium-ion battery by combining CVD with MAO, in S1, the thickness of the TA1 titanium foil is 10 μm˜50 μm.

specific Embodiment approach 3

[0029] Embodiment 3: In Embodiment 1, a method for preparing lithium-ion battery anode materials by combining CVD with MAO, in S1, the solvent for ultrasonic cleaning is absolute ethanol with a purity >99%.

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Abstract

The invention discloses a method for preparing a lithium ion battery negative electrode material by combining CVD with MAO, and belongs to the technical field of material synthesis and new energy. Themethod comprises the following steps: cutting a TA1 titanium foil to a specified size, polishing, cleaning and drying; dehydrating CuCl2. H2O to obtain CuCl2 powder, placing the CuCl2 powder and a TA1 titanium foil substrate in a program control box type furnace, inert gas is introduced for protection, and after copper is deposited at the reaction temperature of 850 DEG C, taking the TA1 titaniumfoil out along with furnace cooling; pouring the micro-arc oxidation electrolyte into a micro-arc oxidation electrolytic cell, fixing the TA1 titanium foil on a fixing frame of the micro-arc oxidation electrolytic cell, and opening a micro-arc oxidation circulating water device by taking the TA1 titanium foil as a positive electrode and a stainless steel plate as a negative electrode; turning ona micro-arc oxidation power supply, setting micro-arc oxidation parameters, turning on a switch, and reacting. According to the invention, a CVD technology is adopted to deposit a layer of copper on the TA1 titanium foil as a current collector, and the deposition thickness is controllable. A TiO2 negative electrode material grows on a TA1 titanium foil in situ by adopting an MAO technology, and the reaction amount of TiO2 is controllable.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and new energy, and in particular relates to a method for preparing lithium-ion battery negative electrode materials by combining CVD with MAO. Background technique [0002] TiO 2 It has always been considered as a potential battery material that can replace graphite. It has attracted the attention of many scholars because of its wide source of materials, low cost, and no pollution to the environment. In addition, it has only 4 % volume expansion rate, more recognized by scholars. [0003] However, on the one hand, commercially used TiO 2 The charge and discharge capacity is very low, which cannot meet people's normal requirements; on the other hand, traditional titanium dioxide cannot grow directly on the current collector, and can only be coated on the current collector through a binder, which causes the titanium dioxide to fall off easily. and the cumbersome process. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/66H01M4/1391H01M4/04H01M10/0525
CPCH01M4/483H01M4/661H01M4/1391H01M4/0442H01M10/0525Y02E60/10
Inventor 赵春香王振廷朱志众
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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