New negative electrode structure and battery

Abstract

The present invention discloses a novel negative electrode structure and battery, relating to the field of battery technology. The novel negative electrode structure comprises a membrane body with adsorption channels formed therein, and a metal adsorption layer disposed on the inner wall of the adsorption channels for adsorbing lithium ions. Both the novel negative electrode structure and the battery have a large charge capacity and strong charge-discharge capabilities.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a novel negative electrode structure and a battery. Background Art

[0002] With the rapid development of portable electronic devices, electric vehicles, and grid energy storage technologies, lithium batteries are increasingly being used in these areas. However, the carbon anodes of existing lithium batteries have a layered structure with numerous micropores. Lithium ions that reach the anode are embedded in the micropores of the carbon layer, but the number of embedded lithium ions is limited, limiting the charge capacity.

[0003] In view of this, it is particularly important to develop and design a new negative electrode structure and battery that can solve the above technical problems. Summary of the Invention

[0004] The object of the present invention is to provide a novel negative electrode structure and a battery, both of which have the characteristics of large charging capacity and strong charging and discharging capabilities.

[0005] The present invention provides a technical solution:

[0006] In a first aspect, an embodiment of the present invention provides a novel negative electrode structure, which includes a film body;

[0007] An adsorption channel is provided on the membrane body, and a metal adsorption layer is provided on the inner wall of the adsorption channel. The metal adsorption layer is used for adsorbing lithium ions.

[0008] In combination with the first aspect, in a first implementation manner of the first aspect, there is a gap between the metal adsorption layer and the opening of the adsorption channel.

[0009] In combination with the first aspect and the above-mentioned implementation manner, in a second implementation manner of the first aspect, the adsorption channel runs through the membrane body.

[0010] In combination with the first aspect and the above-mentioned implementation manner, in a third implementation manner of the first aspect, the membrane body includes a first diaphragm and a second diaphragm, the first diaphragm is provided with a first diaphragm channel extending therethrough, the second diaphragm is provided with a second diaphragm channel extending therethrough, the first diaphragm and the second diaphragm are bonded to each other, and the first diaphragm channel and the second diaphragm channel are connected to form the adsorption channel together;

[0011] Part of the metal adsorption layer is arranged on the inner wall of the first diaphragm channel close to the second diaphragm channel, and part of the metal adsorption layer is arranged on the inner wall of the second diaphragm channel close to the first diaphragm channel.

[0012] In combination with the first aspect and the above-mentioned implementation manner, in a fourth implementation manner of the first aspect, the first diaphragm channel includes a first adsorption section and a first adsorption groove that are interconnected, the second diaphragm channel includes a second adsorption section and a second adsorption groove that are interconnected, the first adsorption groove is located on a side of the first diaphragm close to the second diaphragm, and the second adsorption groove is located on a side of the second diaphragm close to the first diaphragm;

[0013] The opening of the first adsorption groove corresponds to the opening of the second adsorption groove, so that the first diaphragm channel, the first adsorption groove, the second diaphragm channel and the second adsorption groove together form the adsorption channel, and the metal adsorption layer is respectively arranged on the inner wall of the first adsorption groove and the inner wall of the second adsorption groove.

[0014] In combination with the first aspect and the above-mentioned implementation manner, in a fifth implementation manner of the first aspect, the side wall of the first adsorption groove is inclined toward the second adsorption groove, and the side wall of the second adsorption groove is inclined toward the first adsorption groove.

[0015] In combination with the first aspect and its above-mentioned implementation, in a sixth implementation of the first aspect, the first adsorption groove extends along the side of the first diaphragm where the first adsorption groove is located, and the number of the first adsorption segments is multiple, and the multiple first adsorption segments are arranged in sequence along the extension direction of the first adsorption groove, and all extend to the bottom wall of the first adsorption groove to be connected with the first adsorption groove.

[0016] In combination with the first aspect and the above-mentioned implementation manner, in the seventh implementation manner of the first aspect, there are multiple first adsorption grooves, and the multiple first adsorption grooves are arranged in sequence at intervals, and one first adsorption groove is connected to multiple first adsorption sections.

[0017] In combination with the first aspect and the above-mentioned implementation manner, in an eighth implementation manner of the first aspect, the novel negative electrode structure includes a plurality of the membrane bodies, the plurality of the membrane bodies are stacked, and the adsorption channels of two adjacent membrane bodies are connected.

[0018] In a second aspect, embodiments of the present invention further provide a battery comprising the novel negative electrode structure. The novel negative electrode structure comprises a membrane having adsorption channels formed therein, and a metal adsorption layer disposed on the inner wall of the adsorption channels, the metal adsorption layer being configured to adsorb lithium ions.

[0019] Compared with the prior art, the novel negative electrode structure provided by the embodiments of the present invention has the following advantages:

[0020] This new negative electrode structure includes a membrane with adsorption channels formed in the membrane. A metal adsorption layer is provided on the inner wall of the adsorption channels to absorb lithium ions through the metal adsorption layer. As a result, during the battery charging process, lithium ions reach the membrane and embed into the metal adsorption layer within the adsorption channels. The larger space within the adsorption channels allows for more storage of lithium ions and accelerates the diffusion of lithium ions, thereby improving the charge capacity and charge-discharge capabilities of the new negative electrode structure. Furthermore, by providing adsorption channels within the membrane and allowing lithium ions to be absorbed by the metal adsorption layer on the inner wall of the adsorption channels, the new negative electrode structure can reduce the risk of lithium dendrites and has a smaller size.

[0021] The beneficial effects of the battery provided by the embodiment of the present invention relative to the prior art are the same as the beneficial effects of the aforementioned novel negative electrode structure relative to the prior art, and will not be repeated here.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly describes the drawings required for use in the embodiments. It should be understood that the following drawings illustrate only certain embodiments of the present invention and should not be construed as limiting the scope of the present invention. Those skilled in the art can, without inventive effort, derive other relevant drawings from these drawings.

[0024] Figure 1 A schematic cross-sectional view of the novel negative electrode structure provided in an embodiment of the present invention.

[0025] Figure 2 A schematic diagram of the three-dimensional structure of the novel negative electrode structure provided in an embodiment of the present invention.

[0026] Icon: 10-new negative electrode structure; 12-membrane body; 121-first diaphragm; 1211-first diaphragm channel; 1212-first adsorption section; 1213-first adsorption groove; 122-second diaphragm; 1221-second diaphragm channel; 1222-second adsorption section; 1223-second adsorption groove; 15-adsorption channel; 16-metal adsorption layer. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Terms such as "upper," "lower," "inner," "outer," "left," and "right" indicate positions or relationships based on the positions or relationships shown in the figures, or the positions or relationships in which the inventive product is typically placed when in use, or the positions or relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Terms such as "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "comprise," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. Without further constraints, an element defined by the phrase "comprises a..." does not preclude the existence of additional identical elements in the process, method, article or apparatus that includes the element.

[0029] It should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example:

[0032] See also Figure 1 , Figure 1 This is a schematic cross-sectional view of the structure of the novel negative electrode structure 10 provided in an embodiment of the present invention.

[0033] An embodiment of the present invention provides a novel negative electrode structure 10 having a large charge capacity and strong charge-discharge capabilities. The novel negative electrode structure 10 can be applied to batteries and battery systems, and when applied to a battery, the novel negative electrode structure 10 can be positioned adjacent to the battery's positive electrode structure to facilitate charge and discharge. Because the battery utilizes the novel negative electrode structure provided by an embodiment of the present invention, the battery also has a large charge capacity and strong charge-discharge capabilities.

[0034] The structural composition, working principle and beneficial effects of the novel negative electrode structure 10 provided by an embodiment of the present invention will be described in detail below.

[0035] Please continue reading Figure 1 The novel negative electrode structure 10 includes a membrane 12, on which adsorption channels 15 are formed. A metal adsorption layer 16 is provided on the inner wall of the adsorption channel 15 to adsorb lithium ions. As a result, during the battery charging process, lithium ions reach the membrane 12 and are embedded in the metal adsorption layer 16 within the adsorption channel 15. The larger space within the adsorption channel 15 allows for storage of more lithium ions and accelerates the diffusion of lithium ions, thereby improving the charge capacity and charge-discharge capabilities of the novel negative electrode structure 10. Furthermore, by providing the adsorption channels 15 in the membrane 12 and allowing lithium ions to be adsorbed by the metal adsorption layer 16 on the inner wall of the adsorption channel 15, the negative electrode structure 10 can reduce the risk of lithium dendrites and has a smaller volume.

[0036] It should be noted that in this embodiment, the metal adsorption layer 16 is a metal coating on the inner wall of the adsorption channel 15, which can be copper, nickel, platinum, etc. In other embodiments, the metal adsorption layer 16 can also be disposed in the adsorption channel 15 by other processing and installation methods.

[0037] Furthermore, there is a gap between the metal adsorption layer 16 and the opening of the adsorption channel 15. In other words, there is a distance between the metal adsorption layer 16 and the opening of the adsorption channel 15 to further reduce the harm of lithium dendrites.

[0038] In addition, the adsorption channel 15 can penetrate the membrane 12 to further increase the diffusion speed of lithium ions, improve the charge and discharge capabilities of the novel negative electrode structure 10, and reduce the probability of lithium dendrite formation.

[0039] Please continue reading Figure 1 and Figure 2 , Figure 2 Schematic diagram of the three-dimensional structure of the novel negative electrode structure 10 provided in an embodiment of the present invention.

[0040] The membrane body 12 may include a first diaphragm 121 and a second diaphragm 122, wherein a first diaphragm channel 1211 is provided through the first diaphragm 121, and a second diaphragm channel 1221 is provided through the second diaphragm 122. The first diaphragm 121 and the second diaphragm 122 are bonded together to form the membrane body 12, and the first diaphragm channel 1211 and the second diaphragm channel 1221 are connected to form an adsorption channel 15. A portion of the metal adsorption layer 16 is provided on the inner wall of the first diaphragm channel 1211 near the second diaphragm channel 1221, and a portion of the metal adsorption layer 16 is provided on the inner wall of the second diaphragm channel 1221 near the first diaphragm channel 1211, so that after the first diaphragm 121 and the second diaphragm 122 are bonded together, the metal adsorption layer 16 is formed. The membrane body 12 is formed by laminating two separators, and the metal adsorption layer 16 is approximately located in the middle of the two separators, so as to facilitate the processing of the metal adsorption layer 16 and improve the convenience of production and processing of the new negative electrode structure 10.

[0041] Furthermore, the first diaphragm channel 1211 includes a first adsorption section 1212 and a first adsorption groove 1213 that are interconnected, and the second diaphragm channel 1221 includes a second adsorption section 1222 and a second adsorption groove 1223 that are interconnected, and the first adsorption groove 1213 is located on the side of the first diaphragm 121 close to the second diaphragm 122, and the second adsorption groove 1223 is located on the side of the second diaphragm 122 close to the first diaphragm 121, and the opening of the first adsorption groove 1213 corresponds to the opening of the second adsorption groove 1223, so that the first diaphragm channel 1211, the first adsorption groove 1213, and the second diaphragm channel 1221 are connected to each other. 221 and the second adsorption groove 1223 together form an adsorption channel 15, and the metal adsorption layer 16 is respectively arranged on the inner wall of the first adsorption groove 1213 and the inner wall of the second adsorption groove 1223. In other words, after the first diaphragm 121 and the second diaphragm 122 are attached, the first adsorption groove 1213 and the second adsorption groove 1223 together form an adsorption space for adsorbing lithium ions. Lithium ions are adsorbed by the metal adsorption layer 16 on the inner walls of the two docking grooves. The adsorption space is larger and can store more lithium ions, thereby improving the charging capacity of the new negative electrode structure 10. In addition, the larger adsorption space makes the diffusion rate of lithium ions faster.

[0042] It should be noted that, in other embodiments, the first diaphragm channel 1211 and the second diaphragm channel 1221 may also be spaces within the opening.

[0043] Furthermore, the side wall of the first adsorption groove 1213 is tilted toward the second adsorption groove 1223, and the side wall of the second adsorption groove 1223 is tilted toward the first adsorption groove 1213. In other words, the diameter of the groove gradually increases from the inner wall of the groove to the opening direction of the groove, and the opening of the groove is roughly wide-mouthed, thereby further increasing the area of ​​the lithium ion metal adsorption layer 16 for adsorbing lithium ions and increasing the space for adsorbing lithium ions.

[0044] Furthermore, the first adsorption groove 1213 extends along the side surface of the first adsorption groove 1213 on the first diaphragm 121, and the number of the first adsorption segments 1212 is multiple, and the multiple first adsorption segments 1212 are arranged in sequence along the extension direction of the first adsorption groove 1213 at intervals, and all extend to the bottom wall of the first adsorption groove 1213 to be connected with the first adsorption groove 1213. In other words, one end of each of the multiple first adsorption segments 1212 is connected through the first adsorption groove 1213. After the lithium ions reach the membrane body 12, they can enter the first adsorption groove 1213 through different first adsorption segments 1212. The space inside the strip-shaped first adsorption groove 1213 is larger, and the lithium ions can diffuse along the extension direction of the first adsorption groove 1213, so that the diffusion speed of the lithium ions is faster, thereby reducing the probability of forming lithium dendrites.

[0045] It should be noted that the second adsorption groove 1223 extends along the side of the second adsorption groove 1223 on the second diaphragm 122, and the number of the second adsorption segments 1222 is also multiple. The multiple second adsorption segments 1222 are arranged in sequence along the extension direction of the second adsorption groove 1223, and all extend to the bottom wall of the second adsorption groove 1223 to communicate with the second adsorption groove 1223. Its structure is roughly similar to that of the first adsorption groove 1213 and the first adsorption segment 1212, and will not be repeated here.

[0046] Furthermore, there may be multiple first adsorption grooves 1213 , and the multiple first adsorption grooves 1213 are arranged in sequence and spaced apart. One first adsorption groove 1213 is connected to multiple first adsorption sections 1212 to further increase the space for adsorbing lithium ions.

[0047] In addition, the novel negative electrode structure 10 may also include a plurality of membrane bodies 12 , which are stacked and the adsorption channels 15 of two adjacent membrane bodies 12 are connected to form a larger adsorption space through the multiple connected adsorption channels 15 .

[0048] The working principle of the novel negative electrode structure 10 provided by the embodiment of the present invention is:

[0049] The novel negative electrode structure 10 includes a membrane 12, on which adsorption channels 15 are formed. A metal adsorption layer 16 is provided on the inner wall of the adsorption channel 15 to adsorb lithium ions through the metal adsorption layer 16. As a result, during the battery charging process, lithium ions reach the membrane 12 and are embedded in the metal adsorption layer 16 within the adsorption channel 15. The larger space within the adsorption channel 15 allows for storage of more lithium ions and accelerates the diffusion of lithium ions, thereby improving the charge capacity and charge-discharge capabilities of the novel negative electrode structure 10. Furthermore, by providing the adsorption channels 15 in the membrane 12 and allowing lithium ions to be adsorbed by the metal adsorption layer 16 on the inner wall of the adsorption channel 15, the structure can reduce the risk of lithium dendrites and has a smaller size.

[0050] In summary:

[0051] The embodiment of the present invention provides a novel negative electrode structure, which has the characteristics of large charging capacity and strong charging and discharging capabilities.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the features in the above embodiments can be combined with each other without conflict, and the present invention can also have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention. In addition, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A negative electrode structure, characterized in that: including multiple membrane bodies (12); An adsorption channel (15) is provided on the membrane body (12), and a metal adsorption layer (16) is provided on the inner wall of the adsorption channel (15), wherein the metal adsorption layer (16) is used for adsorbing lithium ions; The plurality of membrane bodies (12) are stacked and arranged, and the adsorption channels (15) of two adjacent membrane bodies (12) are connected; The membrane body (12) comprises a first diaphragm (121) and a second diaphragm (122); a first diaphragm channel (1211) is provided through the first diaphragm (121); a second diaphragm channel (1221) is provided through the second diaphragm (122); the first diaphragm (121) and the second diaphragm (122) are bonded together, and the first diaphragm channel (1211) and the second diaphragm channel (1221) are communicated, so as to jointly form the adsorption channel (15); Part of the metal adsorption layer (16) is arranged on the inner wall of the first diaphragm channel (1211) close to the second diaphragm channel (1221), and part of the metal adsorption layer (16) is arranged on the inner wall of the second diaphragm channel (1221) close to the first diaphragm channel (1211); The first diaphragm channel (1211) comprises a first adsorption section (1212) and a first adsorption groove (1213) that are interconnected, the second diaphragm channel (1221) comprises a second adsorption section (1222) and a second adsorption groove (1223) that are interconnected, the first adsorption groove (1213) is located on a side of the first diaphragm (121) close to the second diaphragm (122), and the second adsorption groove (1223) is located on a side of the second diaphragm (122) close to the first diaphragm (121); The opening of the first adsorption groove (1213) corresponds to the opening of the second adsorption groove (1223), so that the first adsorption section (1212), the first adsorption groove (1213), the second adsorption section (1222) and the second adsorption groove (1223) together form the adsorption channel (15), and the metal adsorption layer (16) is respectively arranged on the inner wall of the first adsorption groove (1213) and the inner wall of the second adsorption groove (1223); The side wall of the first adsorption groove (1213) is tilted toward the second adsorption groove (1223), and the side wall of the second adsorption groove (1223) is tilted toward the first adsorption groove (1213).

2. The negative electrode structure according to claim 1, characterized in that There is a gap between the metal adsorption layer (16) and the opening of the adsorption channel (15).

3. The negative electrode structure according to claim 1, characterized in that The first adsorption groove (1213) extends along the side surface of the first diaphragm (121) where the first adsorption groove (1213) is located. The number of the first adsorption segments (1212) is multiple, and the multiple first adsorption segments (1212) are arranged in sequence along the extension direction of the first adsorption groove (1213) at intervals, and all extend to the bottom wall of the first adsorption groove (1213) to communicate with the first adsorption groove (1213).

4. The negative electrode structure according to claim 3, characterized in that: There are a plurality of the first adsorption grooves (1213), and the plurality of the first adsorption grooves (1213) are arranged in sequence and spaced apart, and one first adsorption groove (1213) is connected to a plurality of the first adsorption sections (1212).

5. A battery, characterized in that: The negative electrode structure comprises the negative electrode structure according to any one of claims 1 to 4.

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