Nano-amorphous c-si-c composite material and its manufacturing method and manufacturing device

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

Active Publication Date: 2022-06-21
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 its manufacturing method and manufacturing device
  • Nano-amorphous c-si-c composite material and its manufacturing method and manufacturing device
  • Nano-amorphous c-si-c composite material and its manufacturing method and manufacturing device

Examples

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Effect test

Embodiment 1

[0057] A 304 stainless steel tube with an inner diameter of 60mm was used as the cracking tube of the gas-phase cracking unit, and a heating tape was wound on the outside, and the temperature was programmed and controlled. Since the cracking of alkynes and silanes are both exothermic reactions, in order to effectively control the temperature of the cracking zone, there is no need to set up a thermal insulation jacket on the periphery of the cracking tube, and air cooling can be added if necessary.

[0058] The cracking tubes are 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 intake is set on the bottom side of the three areas, and the flared air outlet. Five layers of Cu / Co / Ni / MgO / TiO are arranged horizontally and equally in ...

Embodiment 2

[0064] A 304 stainless steel tube with an inner diameter of 100mm was used as the cracking tube of the gas-phase cracking unit, and the heating tape was wound on the outside, and the temperature was programmed and controlled. Since the cracking of alkynes and silanes are both exothermic reactions, in order to effectively control the temperature of the cracking zone, there is no need to set a thermal insulation jacket on the periphery of the cracking tube, and air cooling can be added if necessary.

[0065] The cracking tubes are set horizontally, from left to right are cracking zone one, cracking zone two and cracking zone three. 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 intake air is arranged on the left side of the first cracking zone, the second intake air is placed at the lower left side of the second cracking zone, the third intake air is placed ...

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Abstract

The invention discloses a nano-amorphous C-Si-C composite material and its manufacturing method and manufacturing device. The manufacturing method includes the following steps: using a carrier gas to bring an organic alkyne gas into a first cracking zone, and cracking at a low temperature under the action of a catalyst After the nano-amorphous carbon black is obtained, it enters the second cracking zone; the carrier gas is used to bring the silane gas into the second cracking zone, and the low-temperature cracking produces nano-amorphous silicon particles with nano-amorphous carbon black as the crystal nucleus, and then enters the third cracking zone zone; the carrier gas is used to bring the organic alkyne gas into the third cracking zone, and under the action of the catalyst, the carbon black is cracked at a low temperature and coated on the surface of the silicon particles, and the nano-amorphous C-Si-C composite is obtained after gas-solid separation Material. The nano-amorphous C-Si-C composite material is prepared by the above-mentioned manufacturing method. The manufacturing device of the nano-amorphous C-Si-C composite material includes a gas-phase cracking unit, a gas-solid separation unit and an exhaust gas treatment unit. The invention can be continuously produced and can be used as an ideal negative electrode material for lithium-ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and more particularly, relates to a nano-amorphous C-Si-C composite negative electrode material, a manufacturing method and a manufacturing device thereof. Background technique [0002] According to the current technology, to achieve the goal of cell 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 needs a high-capacity silicon carbon negative electrode. It is the successful technical route of Tesla, the current global benchmark 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, it has a low potential to metal lithium, and the possibility of lithium precipitation on its surface is sma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36C01B32/15C01B33/027H01M4/38H01M4/62H01M10/0525B82Y30/00
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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