A porous carbon-coated nitrogen-doped copper-tin alloy porous negative electrode material for lithium batteries and a forming die thereof

Abstract

The present application relates to lithium battery related technical field, specifically for a kind of for lithium battery porous carbon coated nitrogen-doped copper tin alloy porous negative material and its forming die, for lithium battery porous carbon coated nitrogen-doped copper tin alloy porous negative material includes: single water sulfuric acid tetraammine copper crystal 30-70%; Nano tin powder 30-70%; By setting by lower die structure, upper die structure, first gas supply component and secondary gas supply component combination constitutes the forming die for lithium battery porous carbon coated nitrogen-doped copper tin alloy porous negative material, and by first gas supply component, secondary gas supply component are all set into by gas supply pipeline and gas distribution pipeline combination constitutes, and gas distribution pipeline is set into spiral by spring steel, and let gas supply pipeline rotate gas supply, to let first gas supply component and secondary gas supply component realize rotating gas supply, to let gas distribution pipeline form tremor effect, so that hydrogen and methane can better mix, to effectively improve the forming effect of porous negative material.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, specifically to a nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries and its molding die. Background Technology

[0002] The anode material is a crucial component of lithium-ion batteries, and its composition and structure have a decisive impact on the electrochemical performance of the battery. A brief history of lithium-ion battery development shows that the advancement of anode materials propelled lithium-ion batteries into the commercialization stage. Initially, lithium batteries used metallic lithium as the anode material, but metallic lithium is prone to lithium dendrite formation during charging and discharging, leading to safety issues such as fires or explosions. Subsequently, lithium alloy materials were developed to address these safety concerns, but alloy materials are prone to volume expansion during lithium insertion and extraction, resulting in decreased cycle performance. Further research and comparison led to the selection of graphitized carbon as the commercial anode material for lithium-ion batteries. The theoretical specific capacity of commercially available graphite anodes is 372 mAh / g, while the theoretical specific capacity of the less safe metallic lithium is 3860 mAh / g. This demonstrates that lithium batteries have reduced discharge capacity to ensure safety in material selection. However, graphite carbon suffers from low specific capacity and poor rate performance, making the development of anode materials for lithium-ion batteries a current research hotspot.

[0003] Furthermore, the traditional molding die structure for ammonia-doped tin-copper porous anode materials is relatively simple, which cannot allow hydrogen and methane to be fully and uniformly mixed, thus affecting the effect of microwave cold plasma sintering of tin-encapsulated tetraammine copper sulfate monohydrate crystals, and ultimately affecting the molding effect of ammonia-doped tin-copper porous anode materials. To address this issue, this invention proposes a nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries and its molding die to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries and its molding die, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries, wherein the nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries comprises (by mass percentage):

[0006] Tetraamminecopper sulfate monohydrate crystals: 30-70%;

[0007] Nano tin powder 30-70%.

[0008] Preferably, the tetraamminecopper sulfate monohydrate crystal and nano-tin powder are heated to a molten state at 250-300°C, and then the molten material is poured into a mold to obtain a tin-coated tetraamminecopper sulfate monohydrate crystal precursor.

[0009] Preferably, the tetraamminecopper sulfate monohydrate crystal and nano-tin powder are heated to a molten state at 250-300°C, and then the molten material is poured into a mold to obtain a tin-coated tetraamminecopper sulfate monohydrate crystal precursor.

[0010] Preferably, the tin-coated tetraamminecopper sulfate monohydrate precursor is sintered by microwave cold plasma in a mixed atmosphere of hydrogen and methane at a temperature of 800-850°C and a sintering time of 40-60 minutes, forming a porous carbon-coated nitrogen-doped copper-tin alloy porous anode material.

[0011] A molding die for a nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries, the molding die being used to manufacture and process the aforementioned nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries, and the molding die comprising:

[0012] A lower mold structure, on which a mold body is fixedly installed, and a mold groove is provided on the mold body;

[0013] The upper mold structure is provided with a material supply pipe, which is connected to the material supply equipment through a material conveying hose. The upper mold structure is also provided with an air extraction pipe connection port, which is connected to an air extraction equipment through an air extraction pipe.

[0014] A primary gas supply assembly, which is composed of a first gas supply pipe and a gas distribution pipe;

[0015] The secondary gas supply component has the same structure as the primary gas supply component, and the installation methods of the primary and secondary gas supply components are the same.

[0016] Preferably, the gas distribution pipe is spirally arranged and made of spring steel. The first gas supply pipe is rotatably mounted on the upper mold structure, and one end of the first gas supply pipe is sealed. A sealed bearing is fixedly installed at the inner cavity port of the other end of the first gas supply pipe. A second gas supply pipe is fixedly installed in the inner ring of the sealed bearing. The second gas supply pipe is a rigid steel pipe and is positioned on the side wall of the upper mold structure by a pipe support. The second gas supply pipe on the primary gas supply assembly is connected to the hydrogen supply equipment through a primary gas delivery hose. The secondary gas supply assembly is connected to the methane supply equipment through a secondary gas delivery hose.

[0017] Preferably, the sealed ends of the first gas supply pipes on the primary gas supply assembly and the secondary gas supply assembly are connected to the geared motor on the motor bracket via couplings.

[0018] Preferably, both ends of the gas distribution pipe are connected to the inner cavity of the first gas supply pipe, and gas distribution holes are evenly provided on the side wall of the gas distribution pipe.

[0019] Preferably, an elastic support is fixedly connected to the side wall of the gas distribution pipe. The elastic support is composed of an inner ring, an outer ring, and a semi-ring elastic sheet. The inner ring is fixedly connected to the gas distribution pipe, the outer ring is coaxial with the inner ring, and the two sides of the semi-ring elastic sheet are fixedly welded to the outer ring and the inner ring respectively. The semi-ring elastic sheet has a circumference of one ring.

[0020] Preferably, the upper mold structure has a movable hole on its top surface, which corresponds to the mold groove. A first rubber sealing ring is fixedly bonded in the movable hole. The feeding pipe is movably inserted into the first rubber sealing ring, and the upper end of the feeding pipe is fixed to the mounting plate. The upper end of the upper mold structure is fixedly connected to a top plate through a column, and the top plate is driven up and down by a hydraulic component. A telescopic electric cylinder is fixedly installed on the lower surface of the top plate, and the telescopic rod of the telescopic electric cylinder is fixedly connected to the mounting plate.

[0021] Preferably, a sealing groove is provided at the lower surface edge of the upper mold structure, and a second rubber sealing ring is fixedly bonded in the sealing groove. A sealing protrusion is provided at the edge of the lower mold structure corresponding to the second rubber sealing ring. The sealing protrusion is a frame-shaped protrusion structure with a semi-circular cross-section.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. A porous negative electrode material is prepared by mixing tetraamminecopper sulfate monohydrate crystals and nano-tin powder. The porous structure on the surface of the material forms pore walls with good conductivity, which can effectively improve the electron transport channel and increase the electron mobility, thereby making the battery last longer.

[0024] 2. A molding die for nitrogen-doped copper-tin alloy porous anode material for lithium-ion battery porous carbon coating is constructed by setting up a molding die consisting of a lower mold structure, an upper mold structure, a primary gas supply component, and a secondary gas supply component. Both the primary and secondary gas supply components are configured as a combination of a first gas supply pipe and a gas distribution pipe. The gas distribution pipe is made of spring steel and is spirally shaped. The first gas supply pipe rotates to supply gas, thereby enabling the primary and secondary gas supply components to rotate and supply gas. The rotation of the primary and secondary gas supply components causes the gas distribution pipe to vibrate, allowing hydrogen and methane to mix better, thus effectively improving the molding effect of the porous anode material. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the lower mold structure of the present invention;

[0027] Figure 3 This is a schematic diagram showing the location distribution of the primary gas supply component and the secondary gas supply component of the present invention;

[0028] Figure 4 This is a schematic diagram of the primary gas supply component structure of the present invention;

[0029] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0030] In the diagram: 1. Lower mold structure; 2. Mold body; 3. Upper mold structure; 4. Primary air supply component; 5. Secondary air supply component; 6. Mold groove; 7. Column; 8. Top plate; 9. Material supply pipe; 10. Material conveying hose; 11. First air supply pipe; 12. Air distribution pipe; 13. Air distribution hole; 14. Elastic support component; 15. Inner ring body; 16. Outer ring body; 17. Semi-ring elastic sheet; 18. Sealed bearing; 19. Second air supply pipe; 20. Pipe support; 21. Motor support; 22. Gear motor; 23. Air extraction pipe connection port; 24. Second rubber sealing ring; 25. Sealing protrusion; 26. First rubber sealing ring; 27. Mounting plate; 28. Telescopic electric cylinder. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.

[0035] Please see Figure 1-5 The present invention provides the following five preferred embodiments:

[0036] Example 1

[0037] A nitrogen-doped copper-tin alloy porous anode material for porous carbon coating in lithium batteries, comprising (by mass percentage):

[0038] Tetraamminecopper sulfate monohydrate crystals: 30-70%;

[0039] Nano tin powder 30-70%.

[0040] Tetraamminecopper sulfate monohydrate crystals and nano-tin powder are heated to a molten state at 250-300℃, and then the molten material is poured into a mold to obtain a tin-coated precursor of tetraamminecopper sulfate monohydrate crystals.

[0041] Tetraamminecopper sulfate monohydrate crystals and nano-tin powder are heated to a molten state at 250-300℃, and then the molten material is poured into a mold to obtain a tin-coated precursor of tetraamminecopper sulfate monohydrate crystals.

[0042] The precursor of tin-coated tetraamminecopper sulfate monohydrate crystals is sintered by microwave cold plasma in a mixed atmosphere of hydrogen and methane at a temperature of 800-850℃ for 40-60 minutes, forming a porous carbon-coated nitrogen-doped copper-tin alloy porous anode material. The porous anode material is prepared by mixing tetraamminecopper sulfate monohydrate crystals and nano-tin powder. The porous structure on the surface of the material forms pore walls with good conductivity, which can effectively improve the electron transport channel and increase electron mobility, thereby extending the battery's service life.

[0043] Example 2

[0044] Based on Example 1, a molding die for a nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries is provided. This molding die is used to manufacture and process the aforementioned nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries. The molding die for the nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries includes:

[0045] The lower mold structure 1 has a mold body 2 fixedly installed on the lower mold structure 1, and a mold groove 6 is provided on the mold body 2.

[0046] The upper mold structure 3 is provided with a material supply pipe 9, which is connected to the material supply equipment through a material conveying hose 10. The upper mold structure 3 is also provided with an air extraction pipe connection port 23, which is connected to the air extraction equipment through an air extraction pipe.

[0047] The primary gas supply component 4 is composed of a first gas supply pipe 11 and a gas distribution pipe 12.

[0048] The secondary gas supply component 5 has the same structure as the primary gas supply component 4, and the installation methods of the primary gas supply component 4 and the secondary gas supply component 5 are the same.

[0049] The gas distribution pipe 12 is spirally arranged and is made of spring steel. The first gas supply pipe 11 is rotatably installed on the upper mold structure 3, and one end of the first gas supply pipe 11 is sealed. A sealed bearing 18 is fixedly installed at the inner cavity port of the other end of the first gas supply pipe 11. A second gas supply pipe 19 is fixedly installed in the inner ring of the sealed bearing 18. The second gas supply pipe 19 is a rigid steel pipe and is positioned on the side wall of the upper mold structure 3 by a pipe support 20. The second gas supply pipe 19 on the first-stage gas supply assembly 4 is connected to the hydrogen supply equipment through a first-stage gas delivery hose. The second-stage gas supply assembly 5 is connected to the methane supply equipment through a second-stage gas delivery hose.

[0050] The sealed ends of the first gas supply pipes 11 on the primary gas supply assembly 4 and the secondary gas supply assembly 5 are connected to the geared motor 22 on the motor bracket 21 via couplings.

[0051] Both ends of the gas distribution pipe 12 are connected to the inner cavity of the first gas supply pipe 11. Gas distribution holes 13 are evenly opened on the side wall of the gas distribution pipe 12. A forming mold for nitrogen-doped copper-tin alloy porous negative electrode material for porous carbon coating of lithium battery is set up by a combination of lower mold structure 1, upper mold structure 3, primary gas supply component 4 and secondary gas supply component 5. The primary gas supply component 4 and the secondary gas supply component 5 are both set to be composed of the first gas supply pipe 11 and the gas distribution pipe 12. The gas distribution pipe 12 is made of spring steel and set in a spiral shape. The first gas supply pipe 11 is rotated to supply gas, so that the primary gas supply component 4 and the secondary gas supply component 5 can rotate to supply gas. Through the rotation of the primary gas supply component 4 and the secondary gas supply component 5, the gas distribution pipe 12 forms a vibration effect, so that hydrogen and methane can be better mixed, thereby effectively improving the forming effect of porous negative electrode material.

[0052] Example 3

[0053] Based on Embodiment 2, an elastic support member 14 is fixedly connected to the side wall of the gas distribution pipe 12. The elastic support member 14 is composed of an inner ring body 15, an outer ring body 16, and a semi-ring elastic sheet 17. The inner ring body 15 is fixedly connected to the gas distribution pipe 12, and the outer ring body 16 is coaxially arranged with the inner ring body 15. The two sides of the semi-ring elastic sheet 17 are fixedly welded to the outer ring body 16 and the inner ring body 15 respectively. The semi-ring elastic sheet 17 is arranged in a circle. Through the flexible support of the elastic support member 14, the gas distribution pipe 12 can form fluctuations while its overall stability is improved.

[0054] Example 4

[0055] Based on Embodiment 3, an movable hole is provided on the top surface of the upper mold structure 3, which corresponds to the mold groove 6. A first rubber sealing ring 26 is fixedly bonded in the movable hole. The feeding pipe 9 is movably inserted into the first rubber sealing ring 26, and the upper end of the feeding pipe 9 is fixed on the mounting plate 27. The upper end of the upper mold structure 3 is fixedly connected to the top plate 8 through the column 7, and the top plate 8 is driven up and down by a hydraulic component. A telescopic electric cylinder 28 is fixedly installed on the lower surface of the top plate 8. The telescopic rod of the telescopic electric cylinder 28 is fixedly connected to the mounting plate 27, which facilitates the upward movement of the feeding pipe 9, thereby avoiding interference with the air distribution pipe 12.

[0056] Example 5

[0057] Based on Embodiment 4, a sealing groove is provided at the lower surface edge of the upper mold structure 3, and a second rubber sealing ring 24 is fixedly bonded in the sealing groove. A sealing protrusion 25 is provided at the edge of the lower mold structure 1 corresponding to the second rubber sealing ring 24. The sealing protrusion 25 is a frame-shaped protrusion structure with a semi-circular cross section to ensure the sealing at the connection position.

[0058] In actual use, the operator first drives the upper mold structure 3 to move down onto the lower mold structure 1, then uses the air extraction device to extract the gas between the upper mold structure 3 and the lower mold structure 1, and then uses the material supply pipe 9 to move down and distribute the material. Then the material supply pipe 9 is driven to move back up, and then hydrogen and methane gas are distributed through the primary gas supply component 4 and the secondary gas supply component 5.

[0059] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A nitrogen-doped copper-tin alloy porous anode material for porous carbon coating in lithium batteries, characterized in that: The nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries comprises: 30-70% by mass percentage of tetraamminecopper sulfate monohydrate crystals; Nano tin powder 30-70%; The nitrogen-doped copper-tin alloy porous anode material for porous carbon coating in lithium batteries is manufactured using a molding die, which includes: The lower mold structure (1) has a mold body (2) fixedly installed on it, and the mold body (2) has a mold groove (6). The upper mold structure (3) is provided with a material supply pipe (9), which is connected to the material supply equipment through a material conveying hose (10). The upper mold structure (3) is provided with an air extraction pipe connection port (23), which is connected to the air extraction equipment through an air extraction pipe. The primary gas supply assembly (4) is composed of a first gas supply pipe (11) and a gas distribution pipe (12); Secondary gas supply component (5), the structure of the secondary gas supply component (5) is the same as that of the primary gas supply component (4), and the installation methods of the primary gas supply component (4) and the secondary gas supply component (5) are the same; The gas distribution pipe (12) is spirally arranged and is made of spring steel. The first gas supply pipe (11) is rotatably installed on the upper mold structure (3). One end of the first gas supply pipe (11) is sealed. A sealed bearing (18) is fixedly installed at the inner cavity port of the other end of the first gas supply pipe (11). A second gas supply pipe (19) is fixedly installed in the inner ring of the sealed bearing (18). The second gas supply pipe (19) is a hard steel pipe. The second gas supply pipe (19) is positioned on the side wall of the upper mold structure (3) by the pipe support (20). The second gas supply pipe (19) on the first-stage gas supply assembly (4) is connected to the hydrogen gas supply equipment through the first-stage gas delivery hose. The second-stage gas supply assembly (5) is connected to the methane gas supply equipment through the second-stage gas delivery hose. The sealing ends of the first gas supply pipes (11) on the first-level gas supply assembly (4) and the second-level gas supply assembly (5) are connected to the geared motor (22) on the motor bracket (21) via couplings. Both ends of the gas distribution pipe (12) are connected to the inner cavity of the first gas supply pipe (11), and gas distribution holes (13) are evenly opened on the side wall of the gas distribution pipe (12).

2. The nitrogen-doped copper-tin alloy porous anode material for porous carbon coating in lithium batteries according to claim 1, characterized in that: The monohydrate tetraamminecopper sulfate crystal and nano-tin powder are heated to a molten state at 250-300℃, and then the molten material is poured into a mold to obtain a tin-coated precursor of the monohydrate tetraamminecopper sulfate crystal. The tin-coated precursor of the monohydrate tetraamminecopper sulfate crystal is sintered by microwave cold plasma in a mixed atmosphere of hydrogen and methane at a sintering temperature of 800-850℃ and a sintering time of 40-60 minutes to form a porous carbon-coated nitrogen-doped copper-tin alloy porous anode material.

3. A molding die for forming a nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries, characterized in that: The forming mold for the nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries is used to manufacture and process the nitrogen-doped copper-tin alloy porous anode material for porous carbon coating of lithium batteries according to any one of claims 1-2. The forming mold includes: The lower mold structure (1) has a mold body (2) fixedly installed on it, and the mold body (2) has a mold groove (6). The upper mold structure (3) is provided with a material supply pipe (9), which is connected to the material supply equipment through a material conveying hose (10). The upper mold structure (3) is provided with an air extraction pipe connection port (23), which is connected to the air extraction equipment through an air extraction pipe. The primary gas supply assembly (4) is composed of a first gas supply pipe (11) and a gas distribution pipe (12); Secondary gas supply component (5), the structure of the secondary gas supply component (5) is the same as that of the primary gas supply component (4), and the installation methods of the primary gas supply component (4) and the secondary gas supply component (5) are the same; The gas distribution pipe (12) is spirally arranged and is made of spring steel. The first gas supply pipe (11) is rotatably installed on the upper mold structure (3). One end of the first gas supply pipe (11) is sealed. A sealed bearing (18) is fixedly installed at the inner cavity port of the other end of the first gas supply pipe (11). A second gas supply pipe (19) is fixedly installed in the inner ring of the sealed bearing (18). The second gas supply pipe (19) is a hard steel pipe. The second gas supply pipe (19) is positioned on the side wall of the upper mold structure (3) by the pipe support (20). The second gas supply pipe (19) on the first-stage gas supply assembly (4) is connected to the hydrogen gas supply equipment through the first-stage gas delivery hose. The second-stage gas supply assembly (5) is connected to the methane gas supply equipment through the second-stage gas delivery hose. The sealing ends of the first gas supply pipes (11) on the first-level gas supply assembly (4) and the second-level gas supply assembly (5) are connected to the geared motor (22) on the motor bracket (21) via couplings. Both ends of the gas distribution pipe (12) are connected to the inner cavity of the first gas supply pipe (11), and gas distribution holes (13) are evenly opened on the side wall of the gas distribution pipe (12).

4. A molding die for a nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries according to claim 3, characterized in that: An elastic support member (14) is fixedly connected to the side wall of the gas distribution pipe (12). The elastic support member (14) is composed of an inner ring body (15), an outer ring body (16) and a semi-ring elastic plate (17). The inner ring body (15) is fixedly connected to the gas distribution pipe (12). The outer ring body (16) is coaxially arranged with the inner ring body (15). The two sides of the semi-ring elastic plate (17) are fixedly welded to the outer ring body (16) and the inner ring body (15) respectively. The semi-ring elastic plate (17) has a circle around its circumference.

5. A molding die for a nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries according to claim 4, characterized in that: The upper mold structure (3) has a movable hole on its top surface, which is corresponding to the mold groove (6). A first rubber sealing ring (26) is fixedly glued in the movable hole. The feeding pipe (9) is movably inserted into the first rubber sealing ring (26), and the upper end of the feeding pipe (9) is fixed on the mounting plate (27). The upper end of the upper mold structure (3) is fixedly connected to the top plate (8) through the column (7), and the top plate (8) is driven up and down by the hydraulic component. A telescopic electric cylinder (28) is fixedly installed on the lower surface of the top plate (8), and the telescopic rod of the telescopic electric cylinder (28) is fixedly connected to the mounting plate (27).

6. A molding die for a nitrogen-doped copper-tin alloy porous anode material with porous carbon coating for lithium batteries according to claim 5, characterized in that: A sealing groove is provided at the lower surface edge of the upper mold structure (3), and a second rubber sealing ring (24) is fixedly glued in the sealing groove. A sealing protrusion (25) is provided at the edge of the lower mold structure (1) corresponding to the second rubber sealing ring (24). The sealing protrusion (25) is a frame-shaped protrusion structure with a semi-circular cross section.

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