Lithium ion battery anode material based on metal oxide and preparation method thereof

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of large irreversible capacity loss of metal oxides for the first time, poor conductivity of metal oxides, loss of electrochemical activity, etc. First Coulombic Efficiency and Cycling Stability, Stable Electrode Structure, and Effect of Improving Cycling Stability

Active Publication Date: 2020-11-20
山东兴丰新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Metal oxides have high theoretical capacity, high energy density and high safety, and are an ideal negative electrode material for lithium-ion batteries. However, metal oxides tend to form amorphous oxides and SEI films during the first discharge process, and subsequent During the charging process, these amorphous oxides are not all reversible, and the SEI film is also partially decomposed, resulting in a large loss of the first irreversible capacity of the metal oxide, and a low initial Coulombic efficiency. Moreover, the conductivity of

Method used

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  • Lithium ion battery anode material based on metal oxide and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of the negative electrode material of lithium ion battery based on metal oxide, concrete steps are as follows:

[0041] (1) take hydroxyethyl methacrylate, α-bromoisobutyryl bromide, and mercaptoethanol as raw materials to react to generate hydroxyl-terminated hyperbranched polyacrylate;

[0042](2) Then add hydroxyl-terminated hyperbranched polyacrylate, aluminum nitrate nonahydrate, and copper nitrate hexahydrate into methanol, and disperse evenly with ultrasonic waves to obtain a mixed solution, which is transferred to a reaction kettle and reacted at 150°C for 16 hours, followed by post-treatment, namely Aluminum and copper oxide microspheres were obtained;

[0043] (3) Under the atmosphere of carbon dioxide gas, aluminum, copper oxide microspheres and lithium hydride are mixed ball milled, heated to dehydrogenate, and pretreated aluminum and copper oxide microspheres are obtained;

[0044] (4) Finally, the pretreated aluminum, copper oxide m...

Embodiment 2

[0064] The preparation method of the negative electrode material of lithium ion battery based on metal oxide, concrete steps are as follows:

[0065] (1) take hydroxyethyl methacrylate, α-bromoisobutyryl bromide, and mercaptoethanol as raw materials to react to generate hydroxyl-terminated hyperbranched polyacrylate;

[0066] (2) Then add hydroxyl-terminated hyperbranched polyacrylate, aluminum nitrate nonahydrate, and copper nitrate hexahydrate into methanol, and disperse evenly with ultrasonic waves to obtain a mixed solution, which is transferred to a reaction kettle and reacted at 170°C for 13 hours, followed by post-treatment. Aluminum and copper oxide microspheres were obtained;

[0067] (3) Under the atmosphere of carbon dioxide gas, aluminum, copper oxide microspheres and lithium hydride are mixed ball milled, heated to dehydrogenate, and pretreated aluminum and copper oxide microspheres are obtained;

[0068] (4) Finally, the pretreated aluminum, copper oxide microsp...

Embodiment 3

[0088] The preparation method of the negative electrode material of lithium ion battery based on metal oxide, concrete steps are as follows:

[0089] (1) take hydroxyethyl methacrylate, α-bromoisobutyryl bromide, and mercaptoethanol as raw materials to react to generate hydroxyl-terminated hyperbranched polyacrylate;

[0090] (2) Then add hydroxyl-terminated hyperbranched polyacrylate, aluminum nitrate nonahydrate, and copper nitrate hexahydrate into methanol, and ultrasonically disperse evenly to obtain a mixed solution, which is transferred to a reaction kettle and reacted at 160°C for 15 hours, and post-treated, that is Aluminum and copper oxide microspheres were obtained;

[0091] (3) Under the atmosphere of carbon dioxide gas, aluminum, copper oxide microspheres and lithium hydride are mixed ball milled, heated to dehydrogenate, and pretreated aluminum and copper oxide microspheres are obtained;

[0092] (4) Finally, the pretreated aluminum, copper oxide microspheres and...

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Abstract

The invention relates to a lithium ion battery anode material based on a metal oxide and a preparation method thereof. The preparation method comprises the following steps: firstly, taking hydroxyethyl methacrylate, [alpha]-bromo isobutyryl bromide and mercaptoethanol as raw materials to react to generate hydroxyl-terminated hyperbranched polyacrylate; then enabling the hydroxyl-terminated hyperbranched polyacrylate to react with aluminum nitrate nonahydrate and copper nitrate hexahydrate to prepare aluminum and copper oxide microspheres; mixing and ball-milling the aluminum and copper oxide microspheres and lithium hydride in a carbon dioxide gas atmosphere, and performing heating to release hydrogen, so as to obtain pretreated aluminum and copper oxide microspheres; and finally, using the pretreated aluminum and copper oxide microspheres and 2-vinylthiophene as raw materials, performing a polymerization reaction, obtaining the lithium ion battery negative electrode material, and therefore, the initial coulombic efficiency is high, and the cycling stability is good.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a lithium ion battery negative electrode material, in particular to a metal oxide-based lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] Traditional energy sources such as coal, oil and natural gas are non-renewable energy sources and are increasingly exhausted. However, with economic development and social progress, energy demand is increasing. These traditional energy sources can no longer meet the needs of human society development. In recent years, people have been working on how to improve energy efficiency and develop and utilize renewable energy. [0003] Due to the advantages of high energy density, high cycle life, wide operating temperature range, no memory effect, and environmental protection, lithium-ion batteries are widely used in portable electronic devices, electric tools, and electric vehi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M10/0525H01M4/60H01M4/62
CPCH01M4/48H01M4/366H01M10/0525H01M4/602H01M4/624Y02E60/10
Inventor 不公告发明人
Owner 山东兴丰新能源科技有限公司
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