Nano amorphous C-Si-C composite material and manufacturing method and manufacturing device thereof

A nano-amorphous and composite material technology, applied in nano-carbon, nano-technology, nano-technology, etc., can solve problems such as pole piece cracking, and achieve the effect of good conductivity and high capacity

Active Publication Date: 2021-04-20
TOMI CHENGDU APPLIED TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the nano-silicon negative electrode material is used to manufacture the negative electrode sheet, severe cracking of the electrode sheet will occur after coating and drying. This is mainly due to the serious agglomeration of the nano-silicon particles during the drying of the electrode sheet. Particle dispersion and pinning in micron-sized Si / C composite particles

Method used

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  • Nano amorphous C-Si-C composite material and manufacturing method and manufacturing device thereof
  • Nano amorphous C-Si-C composite material and manufacturing method and manufacturing device thereof
  • Nano amorphous C-Si-C composite material and manufacturing method and manufacturing device thereof

Examples

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Effect test

Embodiment 1

[0057] A 304 stainless steel tube with an inner diameter of 60 mm is used as the cracking tube of the gas-phase cracking unit, and a heating belt is wrapped around the outside, and the temperature is programmed to rise and control the temperature. Since the cracking of acetylenes and silanes is an exothermic reaction, in order to effectively control the temperature of the cracking zone, the periphery of the cracking tube may not be provided with a thermal insulation jacket, and wind cooling may be added if necessary.

[0058] The cracking tube is placed vertically, and from bottom to top are the first cracking zone, the second cracking zone, and the third cracking zone. The height of the first cracking zone is 2 meters, the height of the second cracking zone is 2.5 meters, and the height of the third cracking zone is 1.5 meters. The three-way air intake is set on the bottom side of the three areas, and the air outlet is flared. In the first and third cracking zones, five laye...

Embodiment 2

[0064] A 304 stainless steel tube with an inner diameter of 100 mm is used as the cracking tube of the gas-phase cracking unit, and a heating belt is wrapped around the outside, and the temperature is programmed to increase and control the temperature. Since both acetylene and silane cracking are exothermic reactions, in order to effectively control the temperature of the cracking zone, the outer periphery of the cracking tube may not be provided with an insulation jacket, and air cooling may be added if necessary.

[0065] The cracking tubes are arranged horizontally, and from left to right are cracking zone 1, cracking zone 2, and cracking zone 3. The length of the first cracking zone is 2.5 meters, the length of the second cracking zone is 3 meters, and the length of the third cracking zone is 2 meters. The first air intake is set on the left side of the first cracking zone, the second air intake is set on the lower left side of the second cracking zone, the third air intak...

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Abstract

The invention discloses a nanometer amorphous C-Si-C composite material and a manufacturing method and a manufacturing device thereof, the manufacturing method comprises the following steps: carrying an organic acetylene gas into a first cracking zone by using a carrier gas, carrying out low temperature cracking under the action of a catalyst to obtain nanometer amorphous carbon black, and allowing the nanometer amorphous carbon black to enter a second cracking zone; introducing silane gas into the second cracking zone by using carrier gas, carrying out low-temperature cracking to obtain nano amorphous silicon particles taking nano amorphous carbon black as a crystal nucleus, and introducing the nano amorphous silicon particles into a third cracking zone; carrying organic acetylene gas into the third cracking zone by utilizing carrier gas, carrying out low-temperature cracking under the action of a catalyst to obtain carbon black, coating the surfaces of silicon particles with the carbon black, and carrying out gas-solid separation to obtain the nano amorphous C-Si-C composite material. The nano amorphous C-Si-C composite material is prepared by adopting the preparation method. The manufacturing device of the nano amorphous C-Si-C composite material comprises a gas phase cracking unit, a gas-solid separation unit and a tail gas treatment unit. The nano amorphous C-Si-C composite material can be continuously produced and can be used as an ideal negative electrode material of a lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and more specifically relates to a nano-amorphous C-Si-C composite negative electrode material and its manufacturing method and manufacturing device. Background technique [0002] According to the current technology, in order to achieve the goal of battery energy density of 300Wh / kg, the positive electrode material of the battery must use high-capacity nickel-cobalt-manganese NCM811 or nickel-cobalt-aluminum NCA positive electrode material, and the negative electrode material requires high-capacity silicon-carbon negative electrode. It is the successful technical route of Tesla, the current global benchmark company for electric vehicles. [0003] Silicon anode material has an ultra-high theoretical capacity of up to 4200mAh / g. Silicon is particularly abundant in nature and is cheap. In addition, its potential for metal lithium is low, and the possibility of lithium precipitation on its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C01B33/027H01M4/36H01M4/38H01M4/62H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 喻维杰张锡强赵常杜玮
Owner TOMI CHENGDU APPLIED TECH RES INST CO LTD
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