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Lithium ion battery silicon-carbon negative electrode material, and preparation process and equipment thereof

A technology for lithium ion batteries and negative electrode materials, which is applied in metal material coating process, battery electrodes, nanotechnology for materials and surface science, etc. Uniform distribution, weak adhesion, etc.

Inactive Publication Date: 2021-05-07
株洲弗拉德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing silicon-carbon anode material preparation process generally adopts a high-energy milling process to prepare silicon oxide nanoparticles in silicon-carbon anode materials. Since nano-silicon oxides and carbon materials are both in a free state, the clustering phenomenon of nano-silicon oxides cannot be solved, resulting in nano Silicon oxide cannot be evenly distributed in carbon materials, and the combination of nano-silicon oxide particles and carbon is not tight or the adhesion is not strong, which seriously affects the fast charging performance and service life of lithium-ion batteries.

Method used

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  • Lithium ion battery silicon-carbon negative electrode material, and preparation process and equipment thereof
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  • Lithium ion battery silicon-carbon negative electrode material, and preparation process and equipment thereof

Examples

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Embodiment 1

[0041]Such asfigure 1 As shown, the present embodiment provides a fluid plasma gas phase furnace, provided with a feed port 4001 and a discharge port 4002, and a positive electrode plate 3 and a negative electrode plate 1, a positive plate is provided inside the furnace body 4. 3 The number is more than 1, and each positive electrode plate can be connected separately from the working gas and a plasma generator. The positive electrode plate 3 is disposed above the negative electrode plate 1, and the positive electrode plate 3 is maintained at the negative electrode plate 1, the positive electrode plate 3 and the negative plate 1 The parallel space or approximate parallel space is a plasma gas phase deposition zone. A feeding plate and a discharge plate, a feed plate, a discharge plate, and a negative electrode plate 1 are connected to the feed plate, the feed plate, the discharge plate, and the air electrode plate 1 and the feed port 4002, respectively, and have a vibrational plate. ...

Embodiment 2

[0047]This embodiment provides a preparation process of a lithium ion battery silicone carbon anest electrode material, and the silicon weight is about 3% of the total weight of the negative electrode material, and is completed based on the fluidized plasma gas phase furnace in Example 1, and the specific preparation process includes the following step:

[0048]S1. The 93 kg substrate is placed in a hopper in the upper end of the fluid plasma gas deposit furnace feed port 4001, waiting for the feed, the substrate is a human graphite particles, D50 = 15 μm, and the deposited furnace is vacuum-processed, into the furnace The pressure is from 0.01 to 2.

[0049]S2. The electrothermal element is powered, the deposited furnace is warmed to 500 ° C, the feed plate, the negative electrode plate, and the discharge plate are in the vibrational feed state, open the feed port 4001 and the discharge port 4002, the substrate in the flow controllable order Transmit to the negative electrode plate 1 and...

Embodiment 3

[0055]This example provides a preparation process of a lithium ion battery silicone carbon anest electrode material, and the silicon weight is about 5% of the total weight of the negative electrode material, and is completed based on the fluidized plasma gas phase deposits in Example 1, and the specific preparation process includes the following step:

[0056]S1. The 90 kg substrate is placed in a hopper upper end of the fluid plasma gas depositing furnace feed opening, waiting for the feed, the substrate is natural scaly graphic particles, D50 = 11 μm, and the deposited furnace is vacuum-processed, into the furnace The pressure is from 0.01 to 2.

[0057]S2. The electrothermal element is powered, and the deposited furnace is warmed to 480 ° C, the feed plate, the negative electrode plate, and the discharge plate are in the vibrational amount of vibration, and the feed plate and the discharge plate are opened, and the substrate is conveyed by the flow control. On the negative electrode pl...

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Abstract

The invention discloses a lithium ion battery silicon-carbon negative electrode material, and a preparation process and equipment thereof. The negative electrode material comprises a base material and nano silicon deposited on the surface of the base material, the base material is a carbon material, and nano silicon is deposited on the surface of the base material through a plasma enhanced chemical vapor deposition process. In the plasma enhanced chemical vapor deposition process, the base material is in a fluidized motion state in a deposition area, the plasma enhanced chemical vapor deposition process is carried out in a fluidized plasma vapor deposition furnace, and a positive plate and a negative plate are arranged in the fluidized plasma vapor deposition furnace. The deposition area is arranged between the positive plate and the negative plate, and the base material does fluidized motion in the deposition area under the vibration action of the negative plate. According to the invention, the nano silicon is uniformly and firmly distributed on the carbon material through the fluidized flow of the base material in the deposition process, the problem that the nano silicon is agglomerated due to dissociation is solved, and the working performance of the battery can be effectively improved by using the nano silicon as the negative electrode material of the lithium ion battery.

Description

Technical field[0001]The present invention relates to the technical field of lithium ion battery negative electrode material, and more particularly to a lithium ion battery silicone carbon anest electrode material and its preparation processes and equipment.Background technique[0002]Lithium-ion battery is a more mature secondary battery. With the continuous improvement and continuous development of society, people's requirements for lithium-ion battery negative electrode materials are increasing, and traditional graphite negative electrode materials are close to 372mAh / g due to capacity. Capacity, has not further satisfied the miniaturization requirements of electronic equipment and high power, high energy density requirements of the vehicle battery. Silicone carbon negative electrode material is an advanced lithium ion battery negative electrode material that can be replaced with graphite negative electrode materials, and its market share is growing rapidly.[0003]The existing sil...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M4/62H01M10/0525C23C16/513C23C16/54B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C23C16/513C23C16/54H01M4/366H01M4/386H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 言伟雄袁建陵
Owner 株洲弗拉德科技有限公司