CN220258002U - Silicon oxygen negative electrode material preparation facilities - Google Patents
Silicon oxygen negative electrode material preparation facilities Download PDFInfo
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- CN220258002U CN220258002U CN202321467017.9U CN202321467017U CN220258002U CN 220258002 U CN220258002 U CN 220258002U CN 202321467017 U CN202321467017 U CN 202321467017U CN 220258002 U CN220258002 U CN 220258002U
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- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000007773 negative electrode material Substances 0.000 title claims description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 230000006698 induction Effects 0.000 claims abstract description 22
- 239000010405 anode material Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000000151 deposition Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000007323 disproportionation reaction Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical group [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000858 La alloy Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- FAYUQEZUGGXARF-UHFFFAOYSA-N lanthanum tungsten Chemical compound [La].[W] FAYUQEZUGGXARF-UHFFFAOYSA-N 0.000 description 1
- 238000006138 lithiation reaction Methods 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Silicon Compounds (AREA)
Abstract
The utility model provides a preparation device of a silicon-oxygen anode material, which comprises a feeding region, a bin body, a heating unit and a vacuum unit, wherein the inside of the bin body is sequentially communicated with a reaction region, a constant temperature region and a collection region according to the feeding direction, and the constant temperature region can prevent disproportionated steam from growing and depositing near the reaction region; the feeding area is connected with the bin body to push materials to the reaction area; the heating unit comprises a plurality of groups of magnetic induction coils, and the magnetic induction coils are fixed on the inner wall of the bin body to perform induction heating on the reaction area and the constant temperature area; the vacuum unit is communicated with the bin head and provides a vacuum environment for the bin body. The preparation device provided by the utility model can improve the safety of the operation of the device and the preparation efficiency.
Description
Technical Field
The utility model relates to the technical field of preparation of silicon oxide, in particular to a preparation device of a silicon-oxygen anode material.
Background
The lithium ion battery has the advantages of high energy density, long service life, environmental protection and the like, is one of the most attractive energy storage devices at present, and plays an increasingly important role in the modern society. They have already occupied the portable electronic product market such as cell phones, notebook computers and digital cameras. They are also considered as the preferred power source for electric vehicles and stationary energy stores. However, the current state-of-the-art lithium ion batteries do not meet the increasing demands for electric vehicles and large-scale energy storage. Among the lithium ion lithium anode materials currently proposed, silicon is considered as the most promising material to replace graphite. It is the second most abundant element in the crust, is environmentally friendly, and has an ultra-high theoretical capacity (4200 mAhg -1 ). However, in the lithium intercalation/deintercalation process, the volume fluctuation of Si is large (about 300%), and the production cost of nanostructured Si is high, severely impeding its wide application. In recent years, silicon oxide has been considered as a promising substitute for silicon element because of its abundant reserves, low cost, and ease of synthesis. Furthermore, silicon oxide shows less volume change during cycling than elemental silicon. Li generated in situ during first lithiation 2 The O and lithium silicate can buffer larger volume change, and improve the circulation stability.
The main preparation method of the commercial silicon-oxygen material at present is to mix simple substance silicon and silicon dioxide according to a certain mole ratio, then heat up to more than 1500K for disproportionation under negative pressure environment, and then deposit and grow into a block body at the place with lower temperature and pressure. Because the vacuum environment is extremely poor in heat conduction, the traditional preparation device adopts a heating wire auxiliary heat conduction mode, and the problems of high heat loss and low temperature rising rate exist. Meanwhile, in view of the conductivity of the silicon-based material, the dispersed particles may cause damage to the heating wire and even fire during the reaction.
Aiming at the related technology, the applicant believes that most of traditional devices related to the preparation process of the silicon oxygen material have the problems of low electric energy utilization rate, low production efficiency and low safety and stability at present. Therefore, it is necessary to design a preparation device for a safe and stable silicon oxygen anode material, which has high preparation efficiency.
Disclosure of Invention
The present utility model aims to address at least one of the above-mentioned deficiencies of the prior art. For example, the present utility model aims to provide a device for preparing a silicon oxygen anode material.
In order to achieve the above purpose, according to one aspect of the present utility model, there is provided a device for preparing a silicon oxygen anode material, the device may include a feeding region, a chamber body, a heating unit, and a vacuum unit, wherein a reaction region, a constant temperature region, and a collection region are sequentially disposed in the chamber body in a feeding direction, and the constant temperature region is capable of preventing disproportionated steam from growing and depositing near the reaction region; the feeding area is connected with the bin body to push materials to the reaction area; the heating unit comprises a plurality of groups of magnetic induction coils, and the magnetic induction coils are fixed on the inner wall of the bin body to perform induction heating on the reaction area and the constant temperature area; the vacuum unit is communicated with the bin head and provides a vacuum environment for the bin body.
According to one or more exemplary embodiments of the present utility model, the apparatus may further include a heat insulating layer disposed inside the cartridge body and coated outside the heating unit.
According to one or more exemplary embodiments of the present utility model, the magnetic induction coil may be a hollow coil, and the hollow portion is supplied with circulating cooling water.
According to one or more exemplary embodiments of the present utility model, the cartridge body may be provided inside with a metal pipe which is sleeved outside the reaction zone and the constant temperature zone.
According to one or more exemplary embodiments of the present utility model, the apparatus may further include an air cooling unit connected to the cartridge body to achieve rapid cooling.
According to one or more exemplary embodiments of the utility model, the apparatus may further comprise an electronic control unit disposed below the cartridge body.
According to one or more exemplary embodiments of the utility model, the feed zone may employ a vacuum stirring additional screw shaft to propel the feed.
According to one or more exemplary embodiments of the present utility model, a thermal insulation material spacer may be disposed between the reaction zone and the constant temperature zone, and between the constant temperature zone and the collection zone.
According to one or more exemplary embodiments of the present utility model, the feed zone and the reaction zone may be connected using a dynamic seal structure, which may employ a multi-stage dynamic seal, which may include one or more of a packing dynamic seal, a labyrinth dynamic seal, and an oil seal dynamic seal.
According to one or more exemplary embodiments of the present utility model, the reaction zone may be a spindle-shaped rotatable furnace tube with both ends closed.
Compared with the prior art, the utility model has the beneficial effects that at least one of the following contents is included:
(1) According to the silicon-oxygen negative electrode material preparation device provided by the utility model, the furnace tube is directly heated through the magnetic induction coil, so that the electric energy utilization rate and the heating rate are greatly improved, and meanwhile, the magnetic induction heating induction coil is not required to be tightly installed with the furnace body, so that the safety of the device is greatly improved;
(2) The reaction area and the constant temperature area in the silicon oxygen anode material preparation device provided by the utility model are free from the fact that the ceramic material adopted by the traditional preparation device is changed into the metal or alloy material, and the service life of the part is prolonged.
Drawings
The foregoing and other objects and/or features of the utility model will become more apparent from the following description taken in conjunction with the accompanying drawings in which:
fig. 1 shows a schematic structural view of a silicon oxygen anode material preparation apparatus according to an exemplary embodiment of the present utility model.
Reference numerals illustrate:
the device comprises a 1-feeding area, a 2-reaction area, a 3-constant temperature area, a 4-collecting area, a 5-electric control unit, a 6-heating unit, a 61-magnetic induction coil, a 7-metal tube, an 8-heat insulation layer, a 9-air cooling unit and a 10-vacuum unit.
Detailed Description
Hereinafter, a silicon oxygen anode material preparing apparatus of the present utility model will be described in detail with reference to the accompanying drawings and exemplary embodiments.
It should be noted that the "first" and the like are merely for convenience of description and for convenience of distinction, and are not to be construed as indicating or implying relative importance. "upper", "lower", "inner", "outer", etc. are for convenience of description and constitute relative orientations or positional relationships only, and do not indicate or imply that the components referred to must have that particular orientation or position.
Fig. 1 shows a schematic structural view of a silicon oxygen anode material preparation apparatus according to an exemplary embodiment of the present utility model.
First exemplary embodiment
As shown in fig. 1, the silicon oxygen anode material preparation apparatus mainly includes a feeding region 1, a bin body, a heating unit 6, and a vacuum unit 10. The inside of the bin body is sequentially communicated with a reaction zone 2, a constant temperature zone 3 and a collection zone 4 according to the feeding direction. The reaction zone 2 is a material reaction zone, and the constant temperature zone 3 can prevent disproportionation steam from producing and depositing near the reaction zone 2. The situation that the steam subjected to disproportionation is subjected to overheat deposition and has different densities is eliminated. The collection zone 4 is a zone for disproportionation vapor deposition to produce silica. The feeding area 1 is connected with the bin body to push materials to the reaction area 2. Here, the feed zone 1 may be connected to the reaction zone 2 by a set line. The heating unit 6 comprises a plurality of sets of magnetic induction coils 61. The magnetic induction coil 61 is fixed on the inner wall of the chamber body opposite to the outer walls of the reaction zone 2 and the constant temperature zone 3. The reaction zone 2 and the constant temperature zone 3 are subjected to medium/high frequency induction heating, and materials can be heated more uniformly from inside to outside. Here, the intermediate frequency generally means a frequency between 150Hz and 5KHz, and the high frequency generally means a frequency above 100 KHz. Here, the magnetic induction coil may form two heating temperature zones according to the reaction zone and the constant temperature zone. The heating temperatures of the two temperature zones may be different. The heating temperature zone of the constant temperature zone may be 100-150 ℃ lower than the heating temperature zone of the reaction zone. For example 111 ℃, 129 ℃ or 137 ℃. The vacuum unit 10 may be connected to the cabin head, and specifically, the vacuum unit 10 is disposed in front of the cabin body and below the collecting area, and is connected to the cabin head. Providing vacuum environment for the bin body. The vacuum unit may be a vacuum pump. The vacuum unit adopts a multistage pump grading vacuum process, so that the pressure drop rate in the vacuum process is reduced, and the stability and yield of materials are ensured.
In the present exemplary embodiment, as shown in fig. 1, the preparing apparatus may further include an insulation layer 8, and the insulation layer 8 may be fixed to an inner wall of the cartridge body at the periphery of the heating unit 6.
In the present exemplary embodiment, the magnetic induction coil may be a hollow coil, and the hollow portion is supplied with circulating cooling water. Further, the magnetic induction coil may be a copper coil. The induction coil is adopted to directly heat the reaction area, so that the indirect heating mode of traditional heating wire radiation conduction is eliminated, the electric energy utilization rate and the heating rate are greatly improved, the electric heating conversion rate is higher, the heating time is shorter, and the temperature control is more accurate.
In the present exemplary embodiment, as shown in fig. 1, the inside of the cartridge body may be provided with a metal tube 7. The metal tube 7 is sleeved outside the reaction zone 2 and the constant temperature zone 3. Further, the outer wall of the metal tube 7 is spaced from the heating unit 6. The inner wall of the metal tube 7 is arranged at intervals with the outer walls of the reaction zone 2 and the constant temperature zone 3. The metal tube can fix the positions of the reaction zone and the constant temperature zone. And the temperature difference between the reaction zone and the constant temperature zone is balanced, so that the energy is saved. The metal tube establishes between the reaction zone and the constant temperature zone to form a heat buffer zone, so as to prevent the reaction zone and the constant temperature zone from deformation caused by rapid cooling.
In the present exemplary embodiment, as shown in fig. 1, the manufacturing apparatus may further include an air cooling unit 9. The air cooling unit 9 is connected with the bin body, fills gas molecules into the vacuum environment in the bin body, and rapidly cools the bin body. Specifically, the air cooling unit 9 is disposed on the bin body at one side of the feeding area 1, and can be communicated with the inside of the bin body.
In the present exemplary embodiment, as shown in fig. 1, the preparing apparatus may further include an electronic control unit 5. The electronic control unit 5 may be arranged below the preparation device to monitor and control the temperature, pressure, rotational speed and other operating parameters of the device.
In this exemplary embodiment, the feed zone may employ vacuum agitation plus a helical shaft to propel the feed.
In the present exemplary embodiment, as shown in fig. 1, spacers may be provided between the reaction zone 2 and the constant temperature zone 3, and between the constant temperature zone 3 and the collection zone 4. The spacer may be a heat insulating material having good ductility and heat insulation. Such as one or more of mullite rings, molybdenum rings, graphite rings. Because the temperature has radiation property, even in a vacuum furnace, if the temperature of a reaction zone is too high, the temperature of a constant temperature zone is too high, and the collection temperature of materials can be influenced by the temperature of the constant temperature zone. And the performance is deteriorated. The spacer with good heat insulation performance is arranged, so that the influence on material collection caused by overhigh temperature can be reduced. In addition, metals expand at high temperatures, especially in the high temperature range. The good ductility and thermal insulation properties of the spacer prevent the metal or alloy from damaging the device when it expands under heat.
In this exemplary embodiment, a dynamic seal arrangement may be employed between the feed zone and the reaction zone. The dynamic sealing structure can adopt multistage dynamic sealing. The multi-stage dynamic seal may include one or more of a packing dynamic seal, a labyrinth dynamic seal, and an oil seal dynamic seal. Further, the dynamic sealing structure can adopt water cooling for cooling.
In this exemplary embodiment, the reaction zone may be a spindle-shaped rotatable furnace tube with both ends closed. The rotating furnace tube structure ensures that the phenomenon that silicon is deposited in a reaction zone can not occur when various raw materials reach the eutectic point.
In the present exemplary embodiment, the vacuum unit may include one or more of a single stage pump, a dual stage pump, and a Roots pump.
In the present exemplary embodiment, the substrates of the reaction zone and the constant temperature zone may include one or more of 310S stainless steel, 314S stainless steel, molybdenum metal, tungsten lanthanum alloy. The ceramic material adopted by the traditional preparation device is changed into metal or alloy material. The ceramic material can generate micro cracks after multiple cold and hot impacts, so that the cracking and damage of the ceramic are accelerated. And the disproportionated product vapor may permeate to the outside of the ceramic, causing deformation of the heating element and short circuit. The safety of the preparation process can be ensured by adopting alloy or metal materials, and the service life of the device is prolonged.
The application method/working process of the utility model is as follows:
and (3) feeding materials, and pushing the materials to a reaction zone by using a screw shaft. After the vacuum unit is vacuumized, starting high-frequency heating, and controlling the temperature to be above 1500K; the reaction zone is opened to rotate for disproportionation reaction. The material is collected by the collection area after the material is generated. Because of the co-fusion phenomenon of various raw materials, the product can be in a gaseous state during disproportionation, and the vacuum pump is added to continuously pump the pressure in the furnace from the collecting area, so that the material can pass through the barrel of the collecting area, and the gasified product can rapidly condense, deposit and grow in the collecting barrel due to the temperature and the pressure of the collecting area and the lower temperature and pressure of the collecting area. The constant temperature zone ensures that the gasified product cannot be deposited at the outlet of the reaction zone, thereby avoiding the problem that the gasified product cannot be deposited normally due to the blockage of the pipe orifice by the product.
In summary, the advantages of the present utility model may include at least one of the following:
(1) According to the silicon-oxygen anode material preparation device provided by the utility model, the constant temperature area is added between the reaction area and the collecting area, so that the false deposition of disproportionated steam is eliminated, and the consistency of deposition products in the collecting area is ensured;
(2) The silicon-oxygen negative electrode material preparation device provided by the utility model adopts the graphite and carbon composite material as the partition between the temperature areas, and the good ductility ensures that the device is not damaged when the metal or alloy is heated and expanded;
(3) The vacuum unit in the silicon-oxygen anode material preparation device provided by the utility model adopts a multistage pump grading vacuum process, so that the pressure drop rate in the vacuum process is reduced, and the stability and yield of materials are ensured.
Although a silicon oxygen anode material preparation apparatus of the present utility model has been described above by way of example embodiments, it should be apparent to those skilled in the art that various modifications and changes can be made to the example embodiments of the present utility model without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A preparation device of a silicon-oxygen negative electrode material is characterized by comprising a feeding area, a bin body, a heating unit and a vacuum unit, wherein,
the inside of the bin body is sequentially communicated with a reaction zone, a constant temperature zone and a collection zone according to the feeding direction, and the constant temperature zone can prevent disproportionated steam from growing and depositing near the reaction zone;
the feeding area is connected with the bin body to push materials to the reaction area;
the heating unit comprises a plurality of groups of magnetic induction coils, and the magnetic induction coils are fixed on the inner wall of the bin body to perform induction heating on the reaction area and the constant temperature area;
the vacuum unit is communicated with the bin head and provides a vacuum environment for the bin body.
2. The device for preparing a silicon-oxygen anode material according to claim 1, further comprising an insulating layer, wherein the insulating layer is arranged inside the bin body and is coated on the outer side of the heating unit.
3. The apparatus for producing a negative electrode material of silicon oxide according to claim 1, wherein the magnetic induction coil is a hollow coil, and the hollow portion is supplied with circulating cooling water.
4. The device for preparing a silicon-oxygen anode material according to claim 1, wherein a metal tube is arranged in the bin body, and the metal tube is sleeved outside the reaction zone and the constant temperature zone.
5. The device for preparing a silicon-oxygen anode material according to claim 1, further comprising an air cooling unit, wherein the air cooling unit is connected with the bin body to realize rapid cooling.
6. The negative electrode material preparation device according to claim 1, further comprising an electronic control unit disposed below the cartridge body.
7. The device for preparing a negative electrode material of silicon oxide according to claim 1, wherein the feeding section advances the feed by vacuum stirring with an additional screw shaft.
8. The device for preparing a silicon-oxygen anode material according to claim 1, wherein heat insulating material spacers are arranged between the reaction zone and the constant temperature zone and between the constant temperature zone and the collecting zone.
9. The device for preparing a silicon-oxygen anode material according to claim 1, wherein the feeding area and the reaction area are connected by adopting a dynamic sealing structure, the dynamic sealing structure adopts a multi-stage dynamic seal, and the multi-stage seal comprises one or more of a packing dynamic seal, a labyrinth dynamic seal and an oil seal dynamic seal.
10. The device for preparing a silicon-oxygen anode material according to claim 1, wherein the reaction area is a spindle-shaped rotatable furnace tube with two closed ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321467017.9U CN220258002U (en) | 2023-06-09 | 2023-06-09 | Silicon oxygen negative electrode material preparation facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321467017.9U CN220258002U (en) | 2023-06-09 | 2023-06-09 | Silicon oxygen negative electrode material preparation facilities |
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| Publication Number | Publication Date |
|---|---|
| CN220258002U true CN220258002U (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321467017.9U Active CN220258002U (en) | 2023-06-09 | 2023-06-09 | Silicon oxygen negative electrode material preparation facilities |
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| Country | Link |
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| CN (1) | CN220258002U (en) |
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2023
- 2023-06-09 CN CN202321467017.9U patent/CN220258002U/en active Active
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