Lithium recovery device
By installing multiple electrodes in the recycling body of the lithium recovery device and applying an electric field to capture the lithium powder, the problem of collecting lithium powder together with large particles in the prior art is solved, and an efficient and simplified lithium recovery process is achieved.
Patent Information
- Application Number
- CN202380076780.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-10-31
- Filing Date
- 2023-09-26
- Publication Date
- 2025-06-13
AI Technical Summary
When collecting lithium powder, existing lithium recycling devices easily collect small-particle lithium powder with larger particles, resulting in complex recycling processes, increasing equipment volume and reducing collection efficiency.
A lithium recovery device is designed to capture gaseous lithium sulfide into lithium powder by installing a plurality of first electrodes and second electrodes in the recycling body and applying a voltage between the electrodes to generate an electric field. The electrode is connected to the fixing member to separate the lithium powder by vibration or rotation.
Selective collection of small-sized lithium powders is achieved, which improves the collection efficiency of lithium powders, simplifies the recycling process, reduces the device scale, and reduces the lithium recycling cost.
Smart Images
Figure CN120153104A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a lithium recovery device, and more particularly, to a lithium recovery device for recovering gaseous lithium sulfide. Background Art
[0002] Generally, lithium-ion batteries use liquid electrolytes, so they are prone to fire and difficult to store. To solve these problems of lithium-ion batteries, all-solid-state batteries using solid electrolytes are being developed. The solid electrolyte of such an all-solid-state battery uses lithium sulfide (Li 2 2S). Lithium recovery devices for producing such lithium sulfide usually collect lithium powder through processes such as evaporation, condensation, and sublimation.
[0003] That is, lithium sulfide evaporates with gas and is collected through a filter, or collected through a condensation process caused by a temperature difference, or collected through a filter after sublimation. However, in this case, not only small and light lithium powder particles but also other larger particles are collected together, so subsequent processes are required to reclassify only the small lithium powder. Therefore, the lithium recovery process becomes complicated, the size of the lithium recovery device increases, and the collection efficiency of lithium powder decreases. Summary of the Invention
[0004] Technical Problem
[0005] The present invention aims to provide a lithium recovery device with a simple lithium recovery process, which makes the device small in size and can improve the capture efficiency of lithium powder.
[0006] Technical Solution
[0007] A lithium recovery device according to an embodiment of the present invention includes: a recovery body providing an internal path through which gaseous lithium sulfide passes, a plurality of first electrodes installed and separated and positioned within the recovery body, a plurality of second electrodes installed and alternately arranged with the plurality of first electrodes within the recovery body, and a voltage application unit connecting the plurality of first electrodes and the plurality of second electrodes and applying a voltage. An electric field is generated between the plurality of first electrodes and the plurality of second electrodes by the voltage applied by the voltage application unit to capture gaseous lithium sulfide as lithium powder.
[0008] The first electrodes and the second electrodes partially overlap each other.
[0009] It further includes a fixing member installed within the recovery body to fix the plurality of first electrodes and the plurality of second electrodes. The fixing member includes: a first fixing member installed on one hemispherical side of the recovery body, and a second fixing member installed on the other hemispherical side of the recovery body opposite to the one hemispherical side. The plurality of first electrodes are connected to the first fixing member, and the plurality of second electrodes are connected to the second fixing member.
[0010] The first electrode and the second electrode are in a flat plate shape and have a cutting portion or a groove.
[0011] The first electrode and the second electrode have a mesh shape.
[0012] It further includes a powder separation portion for separating the lithium powder captured on the first electrode and the second electrode. The powder separation portion includes: a first powder separation portion that applies vibration to the first electrode and the second electrode to separate the lithium powder, and a second powder separation portion that applies a physical force to the surfaces of the first electrode and the second electrode to separate the lithium powder.
[0013] The first powder separation portion includes a vibration portion mounted on the recovery body.
[0014] The second powder separation portion includes: an electrode rotation portion connected to the first electrode and the second electrode and rotating the first electrode and the second electrode, and a scraping blade that contacts the surfaces of the first electrode and the second electrode driven to rotate by the electrode rotation portion, thereby separating the lithium powder from the first electrode and the second electrode.
[0015] The voltage application portion separates the lithium powder from the first electrode and the second electrode by applying a reverse voltage to the first electrode and the second electrode.
[0016] Advantages of the Invention
[0017] According to an embodiment of the present invention, by utilizing the electric field generated between a plurality of first electrodes and a plurality of second electrodes, gaseous lithium sulfide is collected into lithium powder, thereby enabling selective collection of small-sized lithium powder. Therefore, the collection efficiency of lithium powder can be improved.
[0018] In addition, since it is possible to selectively capture only lithium powder, no additional subsequent processes are required, the scale of the lithium recovery device can be smaller, and the lithium recovery cost can be reduced. Description of the Drawings
[0019] Figure 1 is an exploded perspective view of a lithium recovery device according to an embodiment of the present invention.
[0020] Figure 2 is Figure 1 a cross-sectional view of
[0021] Figure 3 is a plan view of a first electrode or a second electrode of a lithium recovery device according to an embodiment of the present invention.
[0022] Figure 4 is an illustration of Figure 2 the state in which lithium powder is captured on the first electrode and the second electrode in
[0023] Figure 5 is a plan view of a first electrode or a second electrode of a lithium recovery device according to another embodiment of the present invention.
[0024] Figure 6 is a plan view of a first electrode or a second electrode of a lithium recovery device according to another embodiment of the present invention.
[0025] Figure 7 is a cross-sectional view of a lithium recovery device according to another embodiment of the present invention. Detailed Embodiments
[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. The present invention can be implemented in various different forms and is not limited to the embodiments described herein.
[0027] Figure 1 is an exploded perspective view of a lithium recovery device according to an embodiment of the present invention, Figure 2 is Figure 1 a cross-sectional view of Figure 3 is a plan view of a first electrode or a second electrode of the lithium recovery device according to an embodiment of the present invention, Figure 4 is an illustration for explaining Figure 2 the state in which lithium powder is trapped on the first electrode and the second electrode in
[0028] As Figure 1 and Figure 2 shown, the lithium recovery device according to an embodiment of the present invention includes a recovery body 100, a plurality of first electrodes 200, a plurality of second electrodes 300, a voltage application unit 400, and a fixing member 500.
[0029] The recovery body 100 can provide an internal path through which gaseous lithium sulfide (Li 2 2S) passes. In this embodiment, the recovery body 100 is depicted as a cylindrical shape with an empty interior, but it is not limited thereto, and recovery bodies of various shapes can be adopted.
[0030] A plurality of first electrodes 200 are installed inside the recovery body 100 and can be separately positioned. As Figure 3 shown, the first electrode 200 can have a circular flat plate shape with a cutting part 50. Therefore, the contact area between gaseous lithium sulfide (Li 2 2S) and the first electrode 200 can be increased, thereby improving the trapping efficiency of lithium powder (LP). However, the shape of the first electrode 200 is not limited thereto. As Figure 5 shown, the first electrode 200 can have a circular flat plate shape with a plurality of grooves 60. By forming a plurality of grooves 60 on the first electrode 200, the contact area between gaseous lithium sulfide (Li 2The contact area between (S) and the first electrode 200, thereby improving the trapping efficiency of lithium powder (LP).
[0031] A plurality of second electrodes 300 are installed inside the recovery body 100 and can be alternately arranged with a plurality of first electrodes 200. As Figure 3 shown, the second electrode 300 can have a circular flat plate shape with a cutting portion 50. Therefore, the contact area between gaseous lithium sulfide (Li2S) and the first electrode 200 can be increased, thereby improving the trapping efficiency of lithium powder (LP). However, the shape of the second electrode 300 is not limited to this. As Figure 5 shown, the second electrode 300 can have a circular flat plate shape with a plurality of grooves 60. By forming a plurality of grooves 60 on the second electrode 300, the contact area between gaseous lithium sulfide (Li 2 S) and the second electrode 300 can be increased, thereby improving the trapping efficiency of lithium powder (LP).
[0032] The first electrode 200 and the second electrode 300 can partially overlap each other. Therefore, the internal path through which gaseous lithium sulfide passes forms a zigzag shape, making the internal path longer, thereby improving the trapping efficiency of lithium powder (LP).
[0033] The voltage application unit 400 is connected to a plurality of first electrodes 200 and a plurality of second electrodes 300, and can apply a voltage of approximately 50 to 100 V to the plurality of first electrodes 200 and the plurality of second electrodes 300.
[0034] The voltage applied by the voltage application unit 400 to the plurality of first electrodes 200 and the plurality of second electrodes 300 generates an electric field between the plurality of first electrodes 200 and the plurality of second electrodes 300, thereby enabling gaseous lithium sulfide to be trapped as lithium powder.
[0035] As Figure 3 shown, when gaseous lithium sulfide has a positive charge or a negative charge, ionic lithium sulfide attaches to the plurality of first electrodes 200 and the plurality of second electrodes 300 under the action of the electric field between the plurality of first electrodes 200 and the plurality of second electrodes 300, thereby being trapped as lithium powder (LP).
[0036] The fixing member 500 is installed inside the recovery body 100 for fixing the plurality of first electrodes 200 and the plurality of second electrodes 300. The fixing member 500 can be made of an insulating material such as Teflon.
[0037] The fixing member 500 can include a first fixing member 510 and a second fixing member 520.
[0038] The first fixing member 510 can be installed on one hemispherical side of the recovery body 100, i.e., the lower hemispherical side. A plurality of first electrodes 200 can be connected to the first fixing member 510. At this time, the cutting portions 50 of the plurality of first electrodes 200 can be connected to the first fixing member 510 at positions in different directions. Therefore, the internal path through which gaseous lithium sulfide passes becomes longer, thereby improving the trapping efficiency of lithium powder (LP).
[0039] The second fixing member 520 can be installed on the other hemispherical side of the recovery body 100 opposite to the one hemispherical side, i.e., the upper hemispherical side. A plurality of second electrodes 300 can be connected to the second fixing member 520. At this time, the cutting portions 50 of the plurality of second electrodes 300 can be connected to the second fixing member 520 at positions in different directions. Therefore, the internal path through which gaseous lithium sulfide passes becomes longer, thereby improving the trapping efficiency of lithium powder (LP).
[0040] On the other hand, different from the above embodiment, there may also be other embodiments in which the first electrode and the second electrode have a mesh shape.
[0041] Next, with reference to Figure 6 , a lithium recovery device according to another embodiment of the present invention will be described in detail.
[0042] Figure 6 is a plan view of the first electrode or the second electrode of a lithium recovery device according to another embodiment of the present invention.
[0043] Figure 6 In the other embodiment shown, compared with Figures 1 to 4 the one embodiment shown, except for the structures of the first electrode and the second electrode, its structure is substantially the same, so its repeated description is omitted.
[0044] As Figure 6 shown, according to another embodiment of the present invention, the lithium recovery device includes a recovery body 100, a plurality of first electrodes 200, a plurality of second electrodes 300, a voltage application unit 400, and a fixing member 500.
[0045] The first electrode 200 and the second electrode 300 can have a mesh shape. Therefore, by increasing the contact area between gaseous lithium sulfide (Li 2 S) and the first electrode 200 and the second electrode 300, the charging effect can be enhanced, and the trapping efficiency of lithium powder (LP) can be improved.
[0046] On the other hand, different from the above one embodiment, another embodiment may also be adopted, in which a powder separation unit for separating lithium powder is installed.
[0047] Hereinafter, with reference to Figure 7, a lithium recovery device according to other embodiments of the present invention will be described in detail.
[0048] Figure 7 It is a cross-sectional view of a lithium recovery device according to other embodiments of the present invention.
[0049] Figure 7 The other embodiments shown Figures 1 to 4 Compared with one embodiment shown, it is only different in the structure of the powder separation part, so other substantially identical repeated descriptions are omitted.
[0050] As Figure 7 As shown, the lithium recovery device according to other embodiments of the present invention includes a recovery body 100, a plurality of first electrodes 200, a plurality of second electrodes 300, a voltage application part 400, a fixing member 500, and a powder separation part 600.
[0051] The powder separation part 600 can separate and collect the lithium powder on the first electrode 200 and the second electrode 300.
[0052] The powder separation part may include a first powder separation part 610 and a second powder separation part 620.
[0053] The first powder separation part 610 may include a vibration part 610 installed on the recovery body 100. The vibration part 610 is a device for generating vibration and may include a vibration motor, etc. In this way, the first powder separation part 610 can separate the lithium powder from the first electrode 200 and the second electrode 300 by applying vibration to the first electrode 200 and the second electrode 300.
[0054] The second powder separation part 620 may include an electrode rotation part 621 and a wiper 622.
[0055] The electrode rotation part 621 is connected to the first electrode 200 and the second electrode 300 and can rotate the first electrode 200 and the second electrode 300. The electrode rotation part 621 may include a rotation shaft 61 connected to the central axes of the first electrode 200 and the second electrode 300, and a rotation motor 62 connected to the rotation shaft 61 and rotating the rotation shaft 61.
[0056] The wiper 622 contacts the surfaces of the first electrode 200 and the second electrode 300 rotated by the electrode rotation part 621, and can separate the lithium powder from the first electrode 200 and the second electrode 300 by applying a physical force to the first electrode 200 and the second electrode 300.
[0057] In addition, by applying a reverse voltage of the voltage applied by the voltage application part for powder collection to the first electrode 200 and the second electrode 300, the lithium powder can be separated from the first electrode 200 and the second electrode 300 by the opposite charge effect.
[0058] Although the present disclosure has been illustrated by the preferred embodiments, the present invention is not limited thereto, and those skilled in the art to which the present invention pertains will readily understand that the present invention can be variously modified and deformed as long as it does not exceed the scope of the patent claims listed below.
[0059] [Symbol Explanation]
[0060] 100: Recycling body 200: Multiple first electrodes
[0061] 300: Multiple second electrodes 400: Voltage application unit
[0062] 500: Fixing member 600: Powder separation unit
Claims
1. A lithium recovery device, comprising: a recovery body providing an internal path for gaseous lithium sulfide to pass through, a plurality of first electrodes installed and separated within the recovery body, a plurality of second electrodes installed within the recovery body and arranged alternately with the plurality of first electrodes, and a voltage application unit connecting the plurality of first electrodes and the plurality of second electrodes and applying a voltage, wherein an electric field is generated between the plurality of first electrodes and the plurality of second electrodes by the voltage applied by the voltage application unit, and the gaseous lithium sulfide is captured as lithium powder.
2. The lithium recovery device according to claim 1, wherein, the first electrode and the second electrode partially overlap each other.
3. The lithium recovery device according to claim 1, wherein, it further includes a fixing member installed within the recovery body to fix the plurality of first electrodes and the plurality of second electrodes, the fixing member includes: a first fixing piece installed on one hemispherical side of the recovery body, and a second fixing piece installed on the other hemispherical side of the recovery body opposite to the one hemispherical side, the plurality of first electrodes are connected to the first fixing piece, the plurality of second electrodes are connected to the second fixing piece.
4. The lithium recovery device according to claim 1, wherein, the first electrode and the second electrode are in a flat plate shape and have a cutting portion or a groove.
5. The lithium recovery device according to claim 1, wherein, the first electrode and the second electrode have a mesh shape.
6. The lithium recovery device according to claim 1, wherein, it further includes a powder separation unit for separating the lithium powder captured on the first electrode and the second electrode, the powder separation unit includes: a first powder separation unit applying vibration to the first electrode and the second electrode to separate the lithium powder, and a second powder separation unit applying a physical force to the surfaces of the first electrode and the second electrode to separate the lithium powder.
7. The lithium recovery device according to claim 6, wherein, the first powder separation unit includes a vibration unit installed on the recovery body.
8. The lithium recovery device according to claim 6, wherein, the second powder separation unit includes: an electrode rotation unit connected to the first electrode and the second electrode and rotating the first electrode and the second electrode, and a scraping piece contacting the surfaces of the first electrode and the second electrode driven to rotate by the electrode rotation unit, thereby separating the lithium powder from the first electrode and the second electrode.
9. The lithium recovery device according to claim 6, wherein, the voltage application unit separates the lithium powder from the first electrode and the second electrode by applying a reverse voltage to the first electrode and the second electrode.