Silver oxide containing electrode structure and battery

Abstract

This utility model discloses a silver oxide-containing electrode structure and a battery, relating to the field of battery technology. The silver oxide-containing electrode structure includes an electrode body and multiple conductive parts. The electrode body has multiple through holes extending along a first direction. The electrode body is made of manganese oxide. The multiple conductive parts are respectively disposed in the multiple through holes, and each conductive part is made of silver oxide. By setting through holes, conductive parts can be disposed inside the electrode body so that the conductive parts penetrate the electrode body along the first direction. At the same time, the conductive parts are made of silver oxide so that when the battery is turned on, they can obtain electrons from the negative electrode, so that the silver oxide can be converted into silver to modify the electrode body. This prevents the electrode body from being too thick and exceeding the effective range of the conductive parts, which can greatly reduce the resistance of the silver oxide-containing electrode structure. This solves the problem of excessive resistance when the thickness of the active material layer in the existing silver oxide-containing electrode structure exceeds the effective radius of the silver wire.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a silver oxide electrode structure and a battery. Background Technology

[0002] Currently, in batteries, the low electronic conductivity of some active materials (such as manganese dioxide) limits the electron transport speed within the material, leading to a significant increase in the impedance at the electrode interface under high current conditions, severely affecting battery power density and cycle stability. To address this, related technologies typically employ the method of adding metallic conductive lines (such as silver wires) to reduce the overall battery resistance. However, silver is easily oxidized in the electrochemical environment to form a silver oxide phase with a sharp drop in conductivity, forcing the silver wires to be completely embedded under the carbon current collector to avoid surface oxidation. But when the active material layer is thick, the active region far from the silver wire exceeds its effective radius (usually limited by electron tunneling effect and interfacial contact resistance), obstructing the charge transport path and causing the electrode interface resistance to increase exponentially. Utility Model Content

[0003] The main purpose of this invention is to propose a silver oxide-containing electrode structure and a battery, aiming to solve the problem of excessive resistance when the thickness of the active material layer in the existing silver oxide-containing electrode structure exceeds the effective radius of the silver wire.

[0004] To achieve the above objectives, the present invention proposes a silver oxide-containing electrode structure, comprising:

[0005] An electrode body having multiple through holes extending along a first direction, the electrode body being made of manganese oxide; and,

[0006] Multiple conductive parts are respectively disposed in the multiple through holes, and the material of each conductive part is silver oxide.

[0007] In one embodiment, each of the through holes is further provided with a collector portion extending along the first direction.

[0008] In one embodiment, the conductive portion surrounds the outer peripheral surface of the current collector portion; or,

[0009] The current collector portion is disposed around the outer peripheral surface of the conductive portion.

[0010] In one embodiment, the electrode body includes a plurality of electrode layers stacked along the first direction, and the through hole penetrates the plurality of electrode layers.

[0011] In one embodiment, a conductive layer and / or a current collector and / or a permeation layer are provided between two adjacent electrode layers, wherein the conductive layer is made of silver oxide and the permeation layer is made of a porous material.

[0012] In one embodiment, a plurality of electrode bodies are provided, and the plurality of electrode bodies are spaced apart along a second direction.

[0013] In one embodiment, each of the electrode bodies has the conductive portion on at least one side in the second direction.

[0014] In one embodiment, the current collector is provided on the side of the conductive portion away from the electrode body.

[0015] In one embodiment, each of the electrode bodies includes a plurality of electrode layers stacked along the first direction. The plurality of electrode layers include adjacent first electrode layers and second electrode layers. Along the second direction, the width of the first electrode layer is smaller than the width of the second electrode layer, so that the electrode body is stepped on at least one side in the second direction. The first direction and the second direction are orthogonal.

[0016] Furthermore, this utility model also provides a battery comprising the aforementioned silver oxide-containing electrode structure, wherein the battery comprises a thin-film battery, and the silver oxide-containing electrode structure comprises:

[0017] An electrode body having multiple through holes extending along a first direction, the electrode body being made of manganese oxide; and,

[0018] Multiple conductive parts are respectively disposed in the multiple through holes, and the material of each conductive part is silver oxide.

[0019] In the technical solution of this utility model, by setting the through hole, the conductive part is disposed inside the electrode body, so that the conductive part penetrates the electrode body along the first direction. At the same time, the conductive part is made of silver oxide material, so that when the battery is turned on, it can obtain electrons from the negative electrode, so that the silver oxide can be converted into silver to modify the electrode body. This prevents the electrode body from being too thick and exceeding the effective range of the conductive part, which can greatly reduce the resistance of the silver oxide-containing electrode structure. This solves the problem of excessive resistance when the thickness of the active material layer in the existing silver oxide-containing electrode structure exceeds the effective radius of the silver wire. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1This is a cross-sectional view of the first embodiment of the silver oxide-containing electrode structure provided by this utility model;

[0022] Figure 2 for Figure 1 A top view schematic diagram of the silver oxide-containing electrode structure in the image;

[0023] Figure 3 This is a cross-sectional view of the second embodiment of the silver oxide-containing electrode structure provided by this utility model;

[0024] Figure 4 This is a cross-sectional view of the third embodiment of the silver oxide-containing electrode structure provided by this utility model;

[0025] Figure 5 This is a cross-sectional view of the fourth embodiment of the silver oxide-containing electrode structure provided by this utility model;

[0026] Figure 6 This is a cross-sectional view of the fifth embodiment of the silver oxide-containing electrode structure provided by this utility model;

[0027] Figure 7 This is a cross-sectional view of the sixth embodiment of the silver oxide-containing electrode structure provided by this utility model.

[0028] Figure 8 A cross-sectional view of the seventh embodiment of the silver oxide-containing electrode structure provided by this utility model;

[0029] Figure 9 This is a cross-sectional view of the eighth embodiment of the silver oxide-containing electrode structure provided by this utility model.

[0030] Figure 10 A cross-sectional view of the ninth embodiment of the silver oxide-containing electrode structure provided by this utility model;

[0031] Figure 11 This is a cross-sectional schematic diagram of an existing silver oxide electrode structure.

[0032] Explanation of icon numbers:

[0033] 100. Silver oxide electrode structure; 1. Electrode body; 11. Electrode layer; 111. First electrode layer; 112. Second electrode layer; 2. Conductive part; 3. Collector part; 4. Conductive layer; 5. Permeable layer; 6. Collector wire; 7. Collector layer; 8. Base layer.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] Currently, in batteries, the low electronic conductivity of some active materials (such as manganese dioxide) limits the electron transport speed within the material, leading to a significant increase in the impedance at the electrode interface under high current conditions, severely impacting the battery's power density. To address this, related technologies typically employ the addition of metallic conductive lines (such as silver wires) to reduce the overall battery resistance. However, silver is easily oxidized in the electrochemical environment to form a silver oxide phase with a drastically reduced conductivity, forcing the silver wires to be completely embedded under the carbon current collector to prevent surface oxidation. But when the active material layer is thick, the active region far from the silver wire exceeds its effective radius (usually limited by electron tunneling and interfacial contact resistance), obstructing the charge transport path and causing the electrode's interfacial resistance to increase exponentially.

[0039] Based on this, this utility model proposes a silver oxide-containing electrode structure, aiming to solve the problem of excessive resistance in existing silver oxide-containing electrode structures when the thickness of the active material layer exceeds the effective radius of the silver wire. Among other things, Figures 1 to 10This is a schematic diagram of the structure of the silver oxide-containing electrode provided by this utility model; Figure 11 This is a schematic diagram of a silver oxide electrode structure.

[0040] Please see Figures 1 to 2 In one embodiment of the present invention, the silver oxide-containing electrode structure 100 includes an electrode body 1 and a plurality of conductive parts 2. The electrode body 1 is provided with a plurality of through holes extending along a first direction. The electrode body 1 is made of manganese oxide. The plurality of conductive parts 2 are respectively disposed in the plurality of through holes, and each of the conductive parts 2 is made of silver oxide.

[0041] It should be noted that the first and second directions can be varied, including left-right and up-down, front-back and left-right, etc. This invention does not limit these directions; for example, the first direction is up-down, and the second direction is front-back. Furthermore, the electrode body 1 is made of manganese oxide and is used to form the positive electrode portion of the battery.

[0042] It should also be noted that the silver oxide-containing electrode structure 100 further includes a base layer 8 and a current collector layer 7. The current collector layer 7 is disposed on one side of the base layer 8, and the electrode body 1 is disposed on the side of the current collector layer 7 opposite to the base layer 8. Thus, by providing the base layer 8, the current collector layer 7 and the electrode body 1 are disposed, and by providing the current collector layer 7, electrons from the electrode body 1 are collected and transferred to an external circuit. Further, please refer to... Figure 11 In existing silver oxide electrode structures, silver is easily oxidized to silver oxide, leading to a decrease in conductivity. Therefore, silver wires are usually embedded in the current collector layer 7. When the thickness of the electrode body 1 is too large, the side of the electrode body 1 away from the current collector layer 7 easily exceeds its effective radius (usually limited by electron tunneling effect and interface contact resistance), obstructing the charge transport path and resulting in excessively high interface resistance of the electrode. Therefore, in this invention, a conductive part 2 extending along the first direction is provided within the electrode body 1, and the conductive part 2 is made of silver oxide. During battery discharge, manganese dioxide gains electrons and undergoes a reduction reaction. When manganese oxide reacts to the +3 oxidation state, silver oxide reacts more easily with the zinc electrode, converting into conductive metallic silver. In traditional zinc-silver oxide batteries, manganese oxide is often used as an additive to silver oxide. Here, we utilize this principle to modify the manganese oxide electrode with silver oxide. During the discharge process, silver oxide can be converted into silver to modify the electrode body 1, so as to prevent the electrode body 1 from being too thick and exceeding the effective range of the conductive part 2, thereby greatly reducing the resistance of the silver oxide-containing electrode structure 100.

[0043] In the technical solution of this utility model, by setting the through hole, the conductive part 2 is disposed inside the electrode body 1, so that the conductive part 2 penetrates the electrode body 1 along the first direction. At the same time, the conductive part 2 is made of silver oxide material, so that when the battery is turned on, it can obtain electrons from the negative electrode, so that the silver oxide can be converted into silver to modify the electrode body 1. This prevents the electrode body 1 from being too thick and exceeding the effective range of the conductive part 2, which can greatly reduce the resistance of the silver oxide-containing electrode structure 100. This solves the problem of excessive resistance when the thickness of the active material layer in the existing silver oxide-containing electrode structure 100 exceeds the effective radius of the silver wire.

[0044] Please see Figure 1 and Figure 3 The conductive part 2 can be arranged in various ways within the through hole. For example, the through hole can be entirely filled with the conductive part 2, or it can be partially filled with the conductive part 2. This utility model does not limit this. Specifically, in this utility model, each through hole is also provided with a collector part 3 extending along the first direction. In this way, by providing the collector part 3, electrons of the electrode body 1 can be collected and transferred.

[0045] Furthermore, there are various ways to arrange the current collector 3 and the conductive part 2 within the through hole. Specifically, in one embodiment, please refer to... Figure 3 The conductive portion 2 surrounds the outer peripheral surface of the current collector portion 3, thereby allowing the conductive portion 2 to directly contact the electrode body 1. This enables the silver oxide to be reduced to silver during battery discharge, effectively reducing the internal resistance of the electrode body 1. In another embodiment, please refer to... Figure 4 The current collector 3 surrounds the outer peripheral surface of the conductive part 2, thereby isolating the conductive part 2 from the electrode body 1. This allows for the placement of more silver oxide conductive parts 2 within the through hole. Although this reduces the effect of the conductive parts 2 in lowering the internal resistance of the electrode body 1, it enables the storage of more charge, thereby helping to increase the battery capacity.

[0046] In one embodiment of this utility model, please refer to Figure 5 and Figure 6 The electrode body 1 includes a plurality of electrode layers 11 stacked along the first direction. The through hole penetrates the plurality of electrode layers 11. Thus, by providing multiple electrode layers 11, the thickness of the electrode body 1 can be increased, which is beneficial for increasing the battery capacitance, while the thickness of a single electrode layer 11 can be reduced, thus reducing the risk of cracking of the electrode body 1. Furthermore, the number of electrode layers 11 can vary, including two, three, four, or five layers, etc., and can be adjusted as needed. This invention does not limit the specific number of layers.

[0047] In one embodiment of this utility model, please refer to Figures 8 to 10 A conductive layer 4 and / or a current collector line 6 and / or a permeation layer 5 are provided between two adjacent electrode layers 11. The conductive layer 4 is made of silver oxide, and the permeation layer 5 is made of a porous material. By providing the conductive layer 4, the range of silver oxide within the electrode body 1 is increased, which helps to reduce the internal resistance of the electrode body 1. By providing the current collector line 6, electrons between two adjacent electrode layers 11 can be collected, and it can also be connected to multiple current collectors 3 to form a grid line within the electrode body 1, which helps to reduce the internal resistance of the electrode body 1. By providing the permeation layer 5, the electrolyte can permeate within the electrode body 1 along the first direction, which facilitates the conduction of electrolytic ions and thus helps to improve the performance of the battery.

[0048] It should be noted that the provision of a conductive layer 4 and / or a current collector line 6 and / or a permeation layer 5 between two adjacent electrode layers 11 means that one of the conductive layer 4, the current collector line 6, and the permeation layer 5 can be selected, for example, only the permeation layer 5 or only the current collector line 6, etc.; two can be selected, for example, the permeation layer 5 and the current collector line 6, or the conductive layer 4 and the current collector line 6, etc.; all three can be selected simultaneously. This invention does not limit this. Furthermore, the number of permeation layers 5 can vary, including one layer or multiple layers, etc. This invention does not limit this. In addition, the porous material can vary, for example, it can be porous fiber materials such as wood or cotton, or porous polymer materials such as polytetrafluoroethylene or polycarbonate, etc. This invention does not limit this. Furthermore, the conductive layer 4 can be arranged in various ways, for example, it can be a plate-shaped conductive layer 4 or a mesh-shaped conductive layer 4, etc. This invention does not limit this.

[0049] In one embodiment of this utility model, please refer to Figure 6 and Figure 7Multiple electrode bodies 1 are provided, and the multiple electrode bodies 1 are spaced apart along the second direction so that there is a gap between two adjacent electrode bodies 1. This allows the printed silver oxide-containing electrode structure 100 to bend, reducing the risk of cracking. Furthermore, each electrode body 1 has a conductive portion 2 on at least one side in the second direction. Thus, by providing the conductive portion 2 extending along the first direction, electrons from the negative electrode can be obtained during battery discharge, allowing silver oxide to be converted into silver to modify the electrode body 1. This prevents the electrode body 1 from becoming too thick and exceeding the effective range of the conductive portion 2, significantly reducing the resistance of the silver oxide-containing electrode structure 100.

[0050] It is understood that the conductive part 2 is provided on one side of the electrode body 1 in the second direction, which means that the conductive part 2 can be provided on one side of the electrode body 1 in the second direction, or the conductive part 2 can be provided on both sides of the electrode body 1 in the second direction. This utility model does not limit this. The conductive part 2 is spaced apart from the adjacent electrode body 1 so that there is a gap between two adjacent electrode bodies 1 to facilitate the bending of the silver oxide-containing electrode structure 100.

[0051] In one embodiment of this utility model, please refer to Figure 6 and Figure 7 The conductive part 2 is provided with a collector part 3 on the side away from the electrode body 1. In this way, by providing the collector part 3, the conductive part 2 can be sealed off, and electrons of the electrode body 1 can be collected and transferred so that the electrons can be transferred to the external circuit.

[0052] In one embodiment of this utility model, please refer to Figure 7 Each of the electrode bodies 1 includes a plurality of electrode layers 11 stacked along the first direction. The plurality of electrode layers 11 includes adjacent first electrode layers 111 and second electrode layers 112. Along the second direction, the width of the first electrode layer 111 is smaller than the width of the second electrode layer 112, so that the electrode body 1 is stepped on at least one side in the second direction. The first direction and the second direction are orthogonal. In this way, the electrode body 1 is stepped on one side in the second direction, which can reduce the width of the upper end of the electrode body 1, increase the distance between two adjacent electrode bodies 1, facilitate the bending of the silver oxide electrode structure 100, and increase the extension length of the electrode body 1 on one side in the second direction in the first direction. This is beneficial to increasing the contact area between the conductive part 2 and the electrode body 1, thereby helping to reduce the resistance of the electrode body 1.

[0053] It is understood that the step-like arrangement of the electrode body 1 on at least one side in the second direction means that the electrode body 1 can be stepped on one side in the second direction, or the electrode body 1 can be stepped on both sides in the second direction. This utility model does not limit this.

[0054] This utility model also proposes a battery, which includes a silver oxide electrode structure 100. The specific structure of the silver oxide electrode structure 100 is as described in the above embodiments. Since this battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The battery includes a thin-film battery.

[0055] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A silver oxide-containing electrode structure, characterized in that, include: The electrode body has multiple through holes extending along a first direction, and the electrode body is made of manganese oxide. as well as, Multiple conductive parts are respectively disposed in the multiple through holes, and the material of each conductive part is silver oxide.

2. The silver oxide-containing electrode structure as described in claim 1, characterized in that, Each of the through holes is further provided with a collector portion extending along the first direction.

3. The silver oxide-containing electrode structure as described in claim 2, characterized in that, The conductive portion surrounds the outer peripheral surface of the current collector portion; or... The current collector portion is disposed around the outer peripheral surface of the conductive portion.

4. The silver oxide-containing electrode structure as described in claim 1, characterized in that, The electrode body includes a plurality of electrode layers stacked along the first direction, and the through hole penetrates the plurality of electrode layers.

5. The silver oxide-containing electrode structure as described in claim 4, characterized in that, A conductive layer and / or a permeable layer and / or a current collector line are provided between two adjacent electrode layers. The conductive layer is made of silver oxide, and the permeable layer is made of a porous material.

6. The silver oxide-containing electrode structure as described in claim 1, characterized in that, Multiple electrode bodies are provided, and the multiple electrode bodies are spaced apart along the second direction.

7. The silver oxide-containing electrode structure as described in claim 6, characterized in that, Each of the electrode bodies has the conductive portion on at least one side in the second direction.

8. The silver oxide-containing electrode structure as described in claim 7, characterized in that, The conductive part has a current collector on the side away from the electrode body.

9. The silver oxide-containing electrode structure as described in claim 6, characterized in that, Each of the electrode bodies includes a plurality of electrode layers stacked along the first direction. The plurality of electrode layers include adjacent first electrode layers and second electrode layers. Along the second direction, the width of the first electrode layer is smaller than the width of the second electrode layer, so that the electrode body is stepped on at least one side in the second direction. The first direction and the second direction are orthogonal.

10. A battery, characterized in that, The battery includes the silver oxide-containing electrode structure as described in any one of claims 1 to 9, and the battery includes a thin-film battery.

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