Novel negative electrode structure and battery

Abstract

The application discloses a novel negative electrode structure and a battery, and relates to the technical field of batteries. The novel negative electrode structure comprises a carrier and a diaphragm. One side of the carrier is a first adsorption side, and the first adsorption side is provided with an adsorption hole, and the inner wall of the adsorption hole is used for adsorbing lithium ions. The diaphragm is arranged on the first adsorption side, so as to separate the positive electrode structure and the carrier. The novel negative electrode structure and the battery have the characteristics that the charging capacity is large, and the charging and discharging capacity is strong.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a new negative electrode structure and a battery. BACKGROUND

[0002] The carbon of the existing negative electrode of the lithium battery has a layered structure, and has many micropores thereon. The lithium ions reaching the negative electrode are embedded into the micropores of the carbon layer, but the number of the embedded lithium ions is limited, which limits the charging capacity. With the rapid development of portable electronic devices, electric vehicles and grid energy storage technology, the energy density of the existing lithium battery is difficult to meet people's needs.

[0003] Therefore, it is particularly important to develop and design a new negative electrode structure and a battery which can solve the above technical problems. SUMMARY

[0004] The present application aims to provide a new negative electrode structure which has the characteristics of large charging capacity and strong charging and discharging capacity.

[0005] Another object of the present application is to provide a battery which adopts the above-mentioned new negative electrode structure, and also has the characteristics of large charging capacity and strong charging and discharging capacity.

[0006] The present application provides a technical solution:

[0007] In a first aspect, the present application provides a new negative electrode structure, which comprises a carrier and a separator.

[0008] One side of the carrier is a first adsorption side, and an adsorption hole is formed on the first adsorption side, and the inner wall of the adsorption hole is used for adsorbing lithium ions. The separator is arranged on the first adsorption side, so as to separate the positive electrode structure and the carrier.

[0009] In combination with the first aspect, in a first implementation manner of the first aspect, the carrier is a metal carrier.

[0010] In combination with the first aspect and the above implementation manners, in a second implementation manner of the first aspect, the adsorption hole penetrates through the carrier.

[0011] In combination with the first aspect and the above implementation manners, in a third implementation manner of the first aspect, the number of the adsorption holes is multiple, and the multiple adsorption holes are uniformly distributed on the first adsorption side.

[0012] In combination with the first aspect and the above implementation manners, in a fourth implementation manner of the first aspect, the other side of the carrier opposite to the first adsorption side is a second adsorption side, and the adsorption hole penetrates from the first adsorption side to the second adsorption side.

[0013] The new negative electrode structure includes a plurality of the separators, part of the separators are arranged on the first adsorption side, and part of the separators are arranged on the second adsorption side.

[0014] With reference to the first aspect and the implementation manners of the first aspect, in a fifth implementation manner of the first aspect, the number of the carriers is multiple, the multiple carriers are arranged in a stack, and the adsorption holes of the two adjacent carriers are communicated.

[0015] With reference to the first aspect and the implementation manners of the first aspect, in a sixth implementation manner of the first aspect, part of the separators are arranged between the two adjacent carriers, and part of the separators are arranged on the top surface of the top carrier and the bottom surface of the bottom carrier.

[0016] With reference to the first aspect and the implementation manners of the first aspect, in a seventh implementation manner of the first aspect, the adsorption via holes are arranged on the separators, and the adsorption via holes are opposite to the adsorption holes.

[0017] With reference to the first aspect and the implementation manners of the first aspect, in an eighth implementation manner of the first aspect, the adsorption via holes have the same shape and size as the openings of the adsorption holes, and the adsorption via holes are arranged opposite to the adsorption holes.

[0018] In the second aspect, the embodiments of the present application further provide a battery including the new negative electrode structure. The new negative electrode structure includes a carrier and a separator. One side of the carrier is a first adsorption side, and the first adsorption side is provided with adsorption holes. The inner walls of the adsorption holes are used for adsorbing lithium ions. The separator is arranged on the first adsorption side, so as to separate the positive electrode structure and the carrier.

[0019] Compared with the prior art, the new negative electrode structure provided by the embodiments of the present application has the following beneficial effects relative to the prior art:

[0020] The new negative electrode structure includes a carrier and a separator. One side of the carrier is a first adsorption side, and the first adsorption side is provided with adsorption holes. The inner walls of the adsorption holes are used for adsorbing lithium ions. The separator is arranged on the first adsorption side, so as to separate the positive electrode structure and the carrier. In this way, in the charging process of the battery, the lithium ions reach the new negative electrode structure and are embedded on the inner walls of the adsorption holes on the carrier. Since the lithium ions are adsorbed by the inner walls of the adsorption holes, the adsorption space is large, and more lithium ions can be stored, thereby improving the charging capacity of the new negative electrode structure. The large adsorption space makes the diffusion speed of the lithium ions faster, improves the charging and discharging capacity of the new negative electrode structure, and reduces the probability of forming lithium dendrites.

[0021] The beneficial effects of the battery provided by the embodiments of the present application relative to the prior art are the same as the beneficial effects of the novel negative electrode structure relative to the prior art, which will not be described herein again.

[0022] In order to make the above objectives, characteristics and advantages of the present application more apparent, more comprehensible, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to for a detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 The cross-sectional structure schematic diagram of the novel negative electrode structure provided by the embodiments of the present application.

[0025] Figure 2 The structure schematic diagram of the carrier of the novel negative electrode structure provided by the embodiments of the present application.

[0026] Figure 3 The structure schematic diagram of the carrier of the novel negative electrode structure provided by the embodiments of the present application when the carrier is multi-layered.

[0027] Figure legend: 10 - novel negative electrode structure; 11 - carrier; 111 - first adsorption side; 112 - second adsorption side; 113 - adsorption hole; 12 - separator. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the embodiments of the present application more apparent, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] It should be noted that similar reference numerals and letters refer to like items in the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. The terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate the orientation or positional relationship as shown in the drawings, or the orientation or positional relationship as commonly understood by those skilled in the art, or the orientation or positional relationship as commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. The terms "first", "second", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. The terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0030] It should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0032] Embodiment:

[0033] Please refer to Figure 1 , Figure 1 A schematic diagram of the cross-sectional structure of the novel negative electrode structure 10 provided in the embodiments of the present application.

[0034] The embodiments of the present application provide a novel negative electrode structure 10, which has the characteristics of large charging capacity and strong charging and discharging capability. The novel negative electrode structure 10 can be applied to batteries and battery systems, etc. When the novel negative electrode structure 10 is applied to a battery, the novel negative electrode structure 10 can be arranged close to the positive electrode structure of the battery, so that the battery can perform the charging and discharging process. Since the battery adopts the novel negative electrode structure provided in the embodiments of the present application, the battery also has the characteristics of large charging capacity and strong charging and discharging capability.

[0035] The following will specifically introduce the structure composition, working principle and beneficial effects of the novel negative electrode structure 10 provided by the embodiment of the present application.

[0036] Please refer to Figure 1 and Figure 2 , Figure 2 The structure schematic diagram of the carrier 11 of the novel negative electrode structure 10 provided by the embodiment of the present application.

[0037] The novel negative electrode structure 10 includes the carrier 11 and the separator 12. Wherein, one side of the carrier 11 is the first adsorption side 111, the first adsorption side 111 is provided with the adsorption hole 113, and the inner wall of the adsorption hole 113 is used for adsorbing lithium ions. And the separator 12 is covered on the first adsorption side 111, so as to separate the positive electrode structure and the carrier 11. In this way, in the charging process of the battery, the lithium ions reach the novel negative electrode structure 10 and are embedded on the inner wall of the adsorption hole 113 on the carrier 11. Since the lithium ions are adsorbed by the inner wall of the adsorption hole 113, the adsorption space is large, and more lithium ions can be stored, so as to improve the charging capacity of the novel negative electrode structure 10. The large adsorption space makes the diffusion speed of lithium ions faster, improves the charging and discharging capacity of the novel negative electrode structure 10, and reduces the probability of forming lithium dendrites.

[0038] It should be noted that in the embodiment, the carrier 11 is a metal carrier 11. And the carrier 11 can be copper, nickel or the like. By using a metal material carrier 11, the ability of the novel negative electrode structure 10 to adsorb lithium ions is further improved, and the charging and discharging capacity is increased.

[0039] In addition, in the embodiment, the number of adsorption holes 113 can be multiple, and the multiple adsorption holes 113 are uniformly distributed on the first adsorption side 111, so as to improve the charging and discharging capacity of the novel negative electrode structure 10 by the multiple adsorption holes 113 adsorbing lithium ions together.

[0040] Further, the adsorption hole 113 can penetrate the carrier 11. In this way, the space for adsorbing lithium ions is further increased, and the diffusion speed of lithium ions is improved, further reducing the harm of lithium dendrites.

[0041] It should be noted that in the embodiment, the other side of the carrier 11 opposite to the first adsorption side 111 is the second adsorption side 112, and the adsorption hole 113 is through the first adsorption side 111 to the second adsorption side 112. The new negative electrode structure 10 can include multiple diaphragms 12, part of the diaphragms 12 cover the first adsorption side 111, and part of the diaphragms 12 cover the second adsorption side 112. The diaphragm 12 covers the second adsorption side 112 to separate the positive electrode structure and the carrier 11. In this way, the throughly arranged adsorption hole 113 increases the space for adsorbing lithium ions, and the diaphragm 12 is arranged on both sides to facilitate the diffusion of lithium ions from both ends of the adsorption hole 113, further improving the diffusion speed of lithium ions and further reducing the harm of lithium dendrites.

[0042] Further, the diaphragm 12 can be provided with an adsorption via hole (not shown in the figure), and the adsorption via hole is opposite to the adsorption hole 113, that is, the diaphragm 12 covers the first adsorption side 111 and the second adsorption side 112, and leaves a passage for lithium ions to pass through through the adsorption via hole, or only leaves the adsorption hole 113, further improves the diffusion speed of lithium ions, and makes the lithium ions can only be adsorbed on the inner wall of the adsorption hole 113, so as to reduce the probability of lithium dendrites piercing the diaphragm 12, further reducing the harm of lithium dendrites.

[0043] It should be noted that in the embodiment, the opening shape and size of the adsorption via hole are the same as those of the adsorption hole 113, and the adsorption via hole is arranged opposite to the adsorption hole 113, that is, the opening edge of the adsorption via hole extends along the opening edge of the adsorption hole 113. In the embodiment, the adsorption hole 113 is a circular hole, and the adsorption via hole is also a circular hole, and the adsorption hole 113 and the adsorption via hole are concentrically arranged, and the diameter of the adsorption hole 113 is the same as that of the adsorption via hole. Of course, in other embodiments, the adsorption hole 113 and the adsorption via hole can also be other shapes, such as an ellipse.

[0044] Please refer to Figure 3 , Figure 3 The structure schematic diagram of the carrier 11 of the new negative electrode structure 10 provided in the embodiment is shown.

[0045] The new negative electrode structure 10 can include multiple carriers 11, and the multiple carriers 11 are sequentially stacked, and the adsorption holes 113 of the adjacent two carriers 11 are communicated, that is, in the adjacent two carriers 11, the adsorption hole 113 on the upper carrier 11 is butted with the adsorption hole 113 on the lower carrier 11 to form a larger space for lithium ion diffusion and adsorption, further improving the charge and discharge capacity of the new negative electrode structure 10.

[0046] Further, part of the separator 12 is located between two adjacent carriers 11, and part of the separator 12 is located on the top surface of the top carrier 11 and the bottom surface of the bottom carrier 11, in other words, the two adjacent carriers 11 can be separated by the separator 12, and the top and bottom of the multi-layer carrier 11 can be closed by the separator 12, so that the carriers 11 at different positions can be directly connected to the charging and discharging circuit, and the uniformity of the electric field in the adsorption holes 113 of each carrier 11 is improved.

[0047] The working principle of the novel negative electrode structure 10 provided by the embodiment of the application is as follows:

[0048] The novel negative electrode structure 10 comprises a carrier 11 and a separator 12. One side of the carrier 11 is a first adsorption side 111, and the first adsorption side 111 is provided with an adsorption hole 113, and the inner wall of the adsorption hole 113 is used for adsorbing lithium ions. The separator 12 is arranged on the first adsorption side 111, so as to separate the positive electrode structure and the carrier 11. In this way, in the charging process of the battery, the lithium ions reach the novel negative electrode structure 10 and are embedded on the inner wall of the adsorption hole 113 on the carrier 11. Since the lithium ions are adsorbed by the inner wall of the adsorption hole 113, the adsorption space is large, and more lithium ions can be stored, the charging capacity of the novel negative electrode structure 10 is improved, the diffusion speed of the lithium ions is fast due to the large adsorption space, the charging and discharging capacity of the novel negative electrode structure 10 is improved, and the probability of forming lithium dendrites is reduced.

[0049] In summary:

[0050] The embodiment of the application provides a novel negative electrode structure, which has the characteristics of large charging capacity and strong charging and discharging capacity.

[0051] The above only describes the preferred embodiments of the application and is not used to limit the application. For those skilled in the art, the features in the above embodiments can be combined with each other without conflict, the application can also have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application. Moreover, the embodiments should be regarded as exemplary and non-limiting, the scope of the application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A negative electrode structure, characterized in that, Includes a carrier (11) and a diaphragm (12); One side of the carrier (11) is a first adsorption side (111), and an adsorption hole (113) is provided on the first adsorption side (111). The inner wall of the adsorption hole (113) is used to adsorb lithium ions. The membrane (12) is covered on the first adsorption side (111) to separate the positive electrode structure and the carrier (11). The carrier (11) is a metal carrier (11); The other side of the carrier (11) opposite to the first adsorption side (111) is the second adsorption side (112), and the adsorption hole (113) extends from the first adsorption side (111) to the second adsorption side (112). The number of carriers (11) is multiple, and the multiple carriers (11) are stacked in sequence, and the adsorption pores (113) of two adjacent carriers (11) are connected to form a larger space for lithium ion diffusion and adsorption, thereby improving the charge and discharge capability of the negative electrode structure (10). Part of the diaphragm (12) is located between two adjacent carriers (11), and part of the diaphragm (12) is located on the top surface of the top carrier (11) and the bottom surface of the bottom carrier (11). The top and bottom of the multilayer carriers (11) are sealed by the diaphragm (12) so that the carriers (11) at different positions can be directly connected to the charging and discharging circuit, thereby improving the uniformity of the electric field in the adsorption pores (113) of each carrier (11). The diaphragm (12) has an adsorption pore, the adsorption pore and the adsorption hole (113) have the same opening shape and size, and the adsorption pore and the adsorption hole (113) are directly opposite each other.

2. The negative electrode structure according to claim 1, characterized in that, The adsorption pore (113) penetrates the carrier (11).

3. The negative electrode structure according to claim 1, characterized in that, The number of adsorption pores (113) is multiple, and the multiple adsorption pores (113) are evenly distributed on the first adsorption side surface (111).

4. The negative electrode structure according to claim 1, characterized in that, The negative electrode structure (10) includes multiple membranes (12), with some membranes (12) covering the first adsorption side (111) and some membranes (12) covering the second adsorption side (112), the membranes (12) covering the second adsorption side (112) to separate the positive electrode structure and the carrier (11).

5. A battery, characterized in that, Includes the negative electrode structure as described in any one of claims 1-4.

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