KR101704528B1 - Electrode assembly having fiber-shaped structures and battery - Google Patents

Abstract

The present invention relates to an electrode assembly comprising fibrous structures and a battery comprising the same. An electrode assembly according to an embodiment of the present invention includes: a first electrode including one or more fibrous first structures having a polarity of an anode and a cathode; And a second electrode having a polarity different from that of the first structure, the second electrode including one or more fibrous second structures that spirally surround the first structure, wherein the electrode assembly has a predetermined length And the segments are arranged to pass through the separation matrix.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrode assembly including fibrous structures,

The present invention relates to battery technology, and more particularly, to an electrode assembly including fibrous structures and a battery including the same.

BACKGROUND OF THE INVENTION [0002] The battery industry has been actively exploring the development of portable electronic devices due to the recent development of semiconductor manufacturing technology and communication technology, and the development of alternative energy due to environmental preservation and exhaustion of resources. As a typical battery, a lithium primary battery is easier to reduce in size and weight because it has a higher voltage and a higher energy density than a conventional aqueous solution battery. Such a lithium primary cell is used for various purposes such as a main power source for a portable electronic device and a backup power source.

The secondary battery is formed of an electrode material having excellent reversibility and is chargeable and dischargeable. The secondary battery is divided into a cylindrical shape and a rectangular shape, and is classified into a nickel-hydrogen (Ni-MH) battery, a lithium battery, and a lithium ion battery depending on the anode and cathode materials. Such secondary batteries are being applied to a wide range of applications ranging from small batteries such as mobile phones, notebook-type PCs, and mobile displays to batteries for electric vehicles and medium- and large-sized batteries used for hybrid vehicles. Accordingly, the battery requires light weight, high energy density, excellent charge / discharge speed, charge / discharge efficiency and cycle characteristics, as well as high stability and economy.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electrode assembly capable of obtaining a battery having a high energy density, excellent charge / discharge efficiency, charge / discharge speed and cycle characteristics, .

It is another object of the present invention to provide a battery using the electrode assembly having the above-described advantages.

According to an aspect of the present invention, there is provided an electrode assembly for a battery, including: a first electrode including one or more fibrous first structures having a polarity of an anode and a cathode; And a second electrode having a polarity different from that of the first structure, the second electrode comprising one or more fibrous second structures spirally wrapping the first structure. In some embodiments, the first structure may also have a double helix structure extending spirally to surround the first structure and the second structure.

At least one of the first and second structures may include a current collector core and an active material layer surrounding the current collector core. The collector core of the cathode structure of the first and second structures may include Al or an Al alloy. The collector core of the cathode structure of the first and second structures may include Cu or a Cu alloy.

The active material layer includes a primary or secondary battery active material layer. Among the first and second structures, the thickness of the active material layer of the cathode structure is 1 to 300 탆, and the thickness of the active material layer of the cathode structure of the first and second structures may be 3 탆 to 100 탆 .

In some embodiments, the electrode assembly may further include an electrolyte coating layer on at least one of the first and second structures. The electrolyte coating layer may include a solid electrolyte layer. In another embodiment, the electrode assembly may further include a separator between the first and second structures. The separation membrane may be coated on at least one of the first and second structures.

The electrode assemblies may be provided in a plurality of segments having a predetermined length in the battery case to form a battery. The segments may have a spiral structure.

The segments can be randomly arranged to form any space in which the electrolyte will be filled. In addition, the segments may be twisted together to provide a coarse wire structure. In addition, the electrode assembly may further include other segments that spirally wrap the coarse wire structure.

The segments may have a woven arrangement intersecting each other as a string and a bead. In this case, the electrode assembly may further include a separation membrane between the segments, and the segments may have an arrangement in which they are woven to cross each other as a spike and a wing through which the separation membrane reciprocates.

The segments may have an arrangement extending side by side on at least one virtual plane. In this case, the electrode assembly includes a plurality of imaginary planes of the arrangement, and may further include a separator between the imaginary planes. In another embodiment, the segments may be arranged to pass through the separation matrix.

According to another aspect of the present invention, there is provided a battery according to one embodiment of the present invention, wherein the electrode assemblies are provided as stacking, bending, or sensing members and surround the electrode assemblies. The battery may be a primary battery or a secondary battery.

According to the embodiment of the present invention, since the electrodes having different polarities are made up of the respective fibrous structures and they are spirally wound, the facing surface area between the electrodes is increased by the three-dimensional opposing positions with the curved surfaces of the structures . This not only improves the energy density of the battery in the same volume but also improves the charging / discharging rate, charge / discharge efficiency and cycle characteristics of the battery.

In addition, the segments of each structure are disorderly or orderly arranged to form an appropriate space, thereby facilitating the impregnation process of the electrolyte and facilitating shape deformation. Accordingly, according to the embodiment of the present invention, a battery having various sizes, shapes, and various capacities can be easily provided.

FIG. 1A schematically illustrates the structure of an electrode assembly of a battery according to an embodiment of the present invention. FIGS. 1B and 1C are cross-sectional views taken along line AB of FIG. 1A, Fig.
2 schematically shows the structure of an electrode assembly of a battery according to another embodiment of the present invention.
Figures 3A-3B illustrate the arrangement of electrode assemblies applicable in the case of a battery according to an embodiment of the present invention.
Figures 4A and 4B show different ordered arrangements of segments forming the electrode assembly.
Figures 5A and 5B illustrate another ordered arrangement of the segments of the electrode assembly.
6 is a cross-sectional view schematically illustrating a molding process of an arrangement of segments of an electrode assembly.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following drawings, thickness and size of each layer are exaggerated for convenience and clarity of description, and the same reference numerals denote the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of any of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

The embodiments of the present invention are directed to a structure capable of increasing the opposing surface area between electrodes in comparison with a conventional two-dimensional battery structure in which a plate-shaped anode and a cathode are opposed to each other, and an electrode assembly comprising an electrode including a plurality of fibrous structures .

As used herein, the term " different directions " means that when an electrode assembly comprising one or more fibrous first structures and one or more fibrous second structures forms an electrode structure, Of the electrode assembly extends in any direction except for the same direction as the extending direction of the other electrode assembly. That is, in embodiments of the present invention, it can be said that different electrode assemblies have the structural flexibility to be arranged in various angles and directions.

Also, as used herein, the term " crossed structure " means that the segments of different electrode assemblies are arranged to define an intersection point at least at one or more points when they are laminated or wound to form an electrode structure.

In addition, the term 'separator' as used herein includes a separator commonly used in a liquid electrolyte cell using a liquid electrolyte having a low affinity with the separator. In addition, 'separator' as used herein includes an intrinsic solid polymer electrolyte and / or a gel solid polymer electrolyte in which the electrolyte is strongly bound to the separator and the electrolyte and the separator are recognized as being identical. Thus, the separator should have its meaning defined as defined herein.

FIG. 1A schematically illustrates the structure of an electrode assembly 100 of a battery according to an embodiment of the present invention, FIGS. 1B and 1C are cross-sectional views taken along line AB of FIG. 1A, Sectional views of the structures.

Referring to FIG. 1A, an electrode assembly 100 constituting a battery includes a first electrode including a first structure 10 in the form of a fiber having a polarity of either an anode or a cathode; And a second electrode comprising a second structure (20) in the form of a fiber which has a polarity different from that of the first structure (10) and spirally surrounds the first structure (10). Although the first structure 10 and the second structure 20 are shown one by one, the first and second structures 10 and 20 may be plural. In this case, a bundle of second structures 20 may spiral over the first structures 10. Also, one of the electrodes may be a single structure, and the other electrode may be a plurality of structures.

The first and second structures 10 and 20 may be provided in the form of segments having a length extending from several millimeters to tens of meters and one end of each of the structures 10 and 20 may be connected to an electrode tab, One of the external electrodes of the positive electrode or the negative electrode may be provided for the circuit and the other end may be connected to the other electrode tab to provide the external electrode of the other polarity.

The first and second structures 10,20 can have a thickness that can provide appropriate molding processability for various alignment patterns, as in the embodiments described below. For example, the thickness of the structures 10, 20 can be 400 [mu] m to 2000 [mu] m, and can be appropriately selected depending on the application field of the battery.

Referring to Figure 1B, in one embodiment, the first and second structures 10,20 comprise an active material layer 12,22 enclosing the current collector cores 11,21 and the current collector cores 11,12. ). The current collecting cores 11 and 21 may have an elliptical cross section or a rectangular cross section, but the present invention is not limited thereto. The current collector cores 11 and 21 may have a predetermined surface roughness or may be formed with a conductive adhesive layer for bonding in order to provide a surface with which the active material layers 12 and 22 can be easily bonded.

The current collecting cores 12 and 22 may be, for example, metal wires having ductility. A metal-based material such as stainless steel, titanium, aluminum, or any one of these alloys may be used as the current collector core in the anode structure of the first structure and the second structure. Preferably, the positive collector current collector is aluminum or an alloy thereof. As the cathode structure, a metal-based material such as copper, stainless steel, nickel, copper or an alloy of any one of them may be used as the current collector core. Preferably, the current collector core for a negative electrode is an alloy of copper or copper.

However, the embodiments of the present invention are not limited to the above-described materials, and the current collector cores 12 and 22 may be formed of other suitable conductive materials such as poly (sulfurnitrile), Polypyrrole, Poly (p poly (phenylene sulfide), polyaniline, poly (p-phenylenevinylene), and the like. Alternatively, the current collector cores 12 and 22 may be formed of a fibrous material by mixing a conductive carbon paste, a nano-metal particle paste, or an ITO paste with a suitable binder.

The active material layers 12 and 22 surrounding the current collecting cores 11 and 21 may include a material layer suitable for a primary cell or a secondary cell. For example, in the case of a primary cell, the anode active material layer may include manganese oxide, electrolytic manganese dioxide (EMD), nickel oxide, lead oxide, lead dioxide, silver oxide, iron sulfide, or conductive polymer particles. The cathode active material layer may include zinc, aluminum, iron, lead, or magnesium particles.

In the case of the secondary battery, the positive electrode active material layer is formed of at least one metal selected from the group consisting of Ni, Co, Mn, Al, Cr, Fe, Mg, Sr, V, La and Ce and O, F, S, P, And at least one non-metallic element selected from the group consisting of Li. The anode active material layer of the secondary battery may include a carbon-based material such as low-crystalline carbon or highly crystalline carbon capable of intercalating and deintercalating lithium ions. The low crystalline carbon may be a soft carbon or a hard carbon. The highly crystalline carbon may be selected from the group consisting of natural graphite, Kish graphite, pyrolytic carbon, mesophase pitch based carbon fiber, meso-carbon microbeads, mesophase pitches ), Petroleum or coal tar coke (petroleum or coal tar pitch derived cokes). The active material layer for a negative electrode may include a binder, and the binder may include a vinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HFP), polyvinylidene fluoride, polyacrylonitrile, , And polymethylmethacrylate may be used. In another embodiment, in order to provide a secondary battery with a high capacity, the anode active material layer may include metal or intermetallic compounds including S, Si, or Sn.

The active material layers 12 and 22 can be applied on the collector cores 11 and 21 in the form of a slurry containing the active material, binder and conductive material. The slurry may be appropriately selected from the range of 80 to 98 wt% of the active material, 1 to 10 wt% of the binder, and 1 to 10 wt% of the conductive material so that the total amount of the slurry is 100 wt%.

The thickness of the active materials 12 and 22 of each polarity can be appropriately selected within a range that mitigates the progress of the internal short circuit and sufficiently obtains the thinning. For example, the thickness of the positive electrode active material layer may be 1 mu m to 300 mu m, and preferably 30 mu m to 100 mu m. The thickness of the negative electrode active material layer may be 3 to 100 占 퐉, preferably 3 to 40 占 퐉, and more preferably 5 to 20 占 퐉. By selecting the thicknesses of the active material layers 12 and 22 within the above range, it is possible to attain a high level of thinning while obtaining a high output of the battery.

The electrolyte coating layer 13 may be further formed on at least one of the first structure 10 and the second structure 20. 1B illustrates that the electrolyte coating layer 13 is selectively formed only on the first structure 10 but the electrolyte coating layer 13 is formed only on the second structure 20 or on both the first and second structures 10, May be formed.

As shown in FIG. 1B, forming the electrolyte coating layer 13 only on the structure 10 of either polarity can reduce the volume as compared with forming the electrolyte coating layer 13 on both the positive electrode and the negative electrode structures, There is an advantage of increasing the energy density of the battery. Also, when the structures 10 and 20 having different polarities approach each other, a crack may be generated in the electrolyte coating layer 13 due to a change in the volume of the structures 10 and 20 generated during charging and discharging. The life of the electrode structures 10 and 20 may be reduced. Accordingly, it is preferable to form the electrolyte coating layer 13 only on the structure 10 having one polarity as shown in FIG. 1B, and more preferably, it can be selectively formed only on the polar structure having a small volume change upon charging and discharging. For example, in the case of a secondary battery, as shown in FIG. 1B, the electrolyte coating layer 13 may be selectively formed only in the negative electrode structure 10 having a relatively small volume change during charging and discharging.

The electrolyte coating layer 13 may be a solid electrolyte layer. The solid electrolyte layer may be formed of, for example, polyethylene, polypropylene, polyimide, polysulfone, polyurethane, polyvinyl chloride, polystyrene, polyethylene oxide, polypropylene oxide, polybutadiene, cellulose, carboxymethylcellulose, Polyvinylidene fluoride, polytetrafluoroethylene, copolymers of vinylidene fluoride and hexafluoropropylene, copolymers of vinylidene fluoride and trifluoroethylene, vinylidene fluoride and tetrafluoroethylene , Polyvinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, copolymers of polymethylacrylate, polyethyl acrylate, polyethylacrylate, polymethyl methacrylate, polyethyl methacrylate, polybutyl acrylate, polybutyl methacrylate, Either one or a combination of these It may include a polymer matrix, additives and the electrolyte.

The additive can be silica, talc, alumina (Al ₂ O ₃ ), TiO ₂ , clay, zeolite or a combination thereof. The electrolytic solution may be an aqueous electrolytic solution containing a salt such as potassium hydroxide (KOH), potassium bromide (KBr), potassium chloride (KCL), zinc chloride (ZnCl ₂ ) and sulfuric acid (H ₂ SO ₄ ). The electrolyte coating layer may be formed by a continuous impregnation process of the above-described materials using the same solvent as that used in forming the active material layer of the base.

In some embodiments, the electrode assembly 100 may further include a separator between the first and second structures to ensure electrical isolation of the first and second structures 10, 20 in contact with each other. For example, as shown in FIG. 1C, the separation membrane may be a layer 30 coated on the second structure 20. However, this is exemplary, and the separation membrane 30 may be formed on the first structure 10 only, or on both the first and second structures 10, 20. However, this is illustrative, and the separation membrane provided between the structures 10, 20 may have any structure to ensure electrical insulation of the first and second fibrous structures 10, 20. For example, the separation membrane may be provided with a layered structure (30 in FIG. 5A) or a lumpy matrix structure (30 in FIG. 5B) as described below. Also, although not shown, the first and second fibrous structures may extend through the separation membrane having a layered structure or a lumpy matrix structure while spirally wrapping each other.

The separation membrane 30 may be, for example, a microporous membrane, a woven fabric, a nonwoven fabric, an intrinsic solid polymer electrolyte membrane, or a gel solid polymer electrolyte membrane. The intrinsic solid polymer electrolyte membrane may include a straight-chain polymer material or a crosslinked polymer material. The gel polyelectrolyte membrane may be a combination of any one of a plasticizer-containing polymer containing a salt, a filler-containing polymer, or a net polymer.

The materials enumerated with respect to the above-described separator 30 are illustrative, and the separator 30 can be any suitable electronic insulation material that is easy to change in shape, has excellent mechanical strength and is not torn or cracked even when deformed in the electrode structure 100 A material may be used, and it may have suitable ionic conductivity as an electron-insulative material. The separation membrane 30 may be a single layer film or a multilayer film, and the multilayer film may be a laminate of the same single layer film or a laminate of a single layer film formed of different materials. The thickness of the separation membrane 30 may be 10 to 300 占 퐉, preferably 10 to 40 占 퐉, and more preferably 10 to 25 占 퐉, in consideration of durability, shutdown function, and safety of the battery. The electrolyte solution 40 may surround the electrode assembly for activation of the electrode assemblies 10, 20.

As described above, the first and second structures 10 and 20 continuously intersect in a spiral manner in the extending direction, so that the inter-electrode opposed surface area can be increased within the same volume. Accordingly, by constructing the electrode using the first and second structures, not only the energy density can be improved, but also the charging / discharging rate, charging / discharging efficiency, and cycle characteristics of the battery can be improved.

2 schematically shows the structure of an electrode assembly 200 of a battery according to another embodiment of the present invention.

2, unlike the electrode assembly 100 of FIG. 1A, the electrode assembly 200 includes a double helix structure in which the first structure 10 and the second structure 20 extend in a spiral manner and enclose each other . In the illustrated embodiment, the description of each constituent member can be referred to with reference to Figs. 1A to 1C, and repeated explanation will be omitted unless it is contradictory.

Although the first structure 10 and the second structure 20 are shown one by one, the first and second structures 10 and 20 may be plural. In this case, the bundle of the first structures 10 and the bundle of the second structures 20 may form a double helix structure. Also, one of the electrodes may be a single structure, and the other electrode may be a plurality of structures. For example, one negative electrode structure and a plurality of positive electrode structure bundles may form a double helix structure.

According to the embodiment shown in FIG. 2, since the two structures 10 and 20 all extend in a spiral manner and face each other continuously, the facing surface area is further increased, so that the coupling between the electrodes can be made stronger. As a result, not only the energy density can be further improved, but also the charging / discharging rate, charging / discharging efficiency and cycle characteristics of the battery are improved. In addition, since the double helix structure increases the mechanical strength of the fibrous structure and has a wire structure, it can be arranged in various forms in the battery case as described later.

Figures 3A-3B illustrate the arrangement of electrode assemblies applicable in the case of a battery according to an embodiment of the present invention.

Referring to FIG. 3A, in order to provide a battery, the above-described electrode assemblies may be provided in a plurality of segments 300A and 300B having a predetermined length in a battery case. Each of the segments 300A and 300B may have a spiral structure as shown in Fig. 3A. Since the electrode assembly itself has a spiral structure, these segments can be easily formed to have a spiral structure. However, this is exemplary, and the segments 300A and 300B do not have a helical structure like a normal thread, or may be formed into a wave shape, a curled shape, or a Velcro shape so as to be tangled with each other. The various shaped segments 300A, 300B may be disorderly arranged and tangled together. The space formed between the entangled segments 300A and 300B is advantageous for sucking the electrolyte solution like a sponge, thereby facilitating the impregnation process of the electrolyte solution.

One end of the anode structure of each segment 300A and one end of the anode structure of the other segment 300B may be electrically coupled to each other to provide a common anode 51. [ Likewise, one end of the cathode structure of the segments 300A and one end of the cathode structure of the other segment 300B may also be electrically coupled to one another to provide a common cathode 52. Both the common anode 51 and the common cathode 52 may be provided as external electrodes. In another embodiment, either one of the positive electrodes and either one of the positive electrodes may be connected to each other within the battery. In this case, various bipolar batteries having increased use voltages may be provided.

In other embodiments, the segments 300A, 300B of the electrode assembly may be arranged in order. 3B shows a thick wire structure WR in which segments 300C of two or more electrode assemblies are formed by twisting and extending the segments 300C in a form in which the segments 300C are arranged in order. Such a thick wire structure (WR) can increase the mechanical strength of the electrode assembly and reduce the volume, thereby providing a compact and durable battery. The coarse wire WR may itself provide a linear cell, may be woven with another coarse wire, or may be formed into a random arrangement or a velcro form to provide a battery having any shape. As another example, the thick wire WR may be wrapped by another segment 300D spirally extending as shown in Fig. 3C. The illustrated segment 300D is a structure in which a structure of a positive electrode is combined with a structure of a negative electrode fiber, but the coarse wire WR may be wound with at least one of a structure of a positive electrode structure and a structure of a negative electrode structure.

Figures 4A and 4B illustrate different ordered arrangements of the segments 400A, 400B forming the electrode assembly.

Referring to FIG. 4A, the segments 400A and 400B of the electrode assembly may have a woven arrangement intersecting each other as a string and a bead. Since the woven array has a plate-like structure, it is easy to deform such as terminal, fold or bend, thereby providing a battery having various shapes. Also, as described with reference to FIG. 3A, the woven arrangement also has an advantage of facilitating the penetration of the electrolytic solution into the space between the segments.

Referring to FIG. 4B, the segments 400A and 400B of the electrode assembly may have an arrangement in which they are woven to cross each other as a string and a loop which reciprocate through the separator 30. The isolation between the segments can be improved by the separator 30 and the mechanical strength of the electrode assembly can be improved.

Figures 5A and 5B illustrate another ordered arrangement of the segments 500A, 500B of the electrode assembly.

Referring to FIG. 5A, the segments 500A and 500B of the electrode assembly may extend in one direction in a virtual plane. The virtual planes of the segments 500A and 500B extending in parallel may be two or more as shown, and the extension directions of the segments 500A and 500B in each virtual plane may be different from each other. For example, as shown, the segments 500A in one virtual plane may intersect with the extending direction of the segments 500B in the other plane with a 90 [deg.] Difference. The spacing between the segments 500A and 500B may be zero or have any arbitrary size capable of providing the molding processability of the cell, for example, from 5 占 퐉 to several 占 퐉. In some embodiments, a separation membrane 30 may be further disposed between the planes of the segments 500A, 500B that extend side by side.

Referring to FIG. 5B, the virtual planes formed by the segments 500A, 500B extending in parallel are contained within the separation matrix 30. The separation matrix 30 may be formed of the same material as the above-described separation membranes (30 in Fig. 5A). The separation matrix 30 may have a thickness that can contain at least two virtual planes of the segments 500A, 500B. To align the segments 500A, 500B within the separation matrix 30, first align the segments 500A, 500B in the solution to be the separation matrix and then cure the solution to provide the illustrated arrangement . It will be appreciated that the segments 500A, 500B extending through the separation matrix 30 do not necessarily have to be coplanar and may be arranged randomly. Also, as described above, it is also possible to select an arrangement in which fibrous structures of different polarities passing through the separation matrix 30 are spirally extended and extended to each other.

The electrode assembly composed of the above-described structures is easy to change in shape, and various lengths, numbers, shapes, and electrical connections of the segments can be selected for adjusting the capacity of the battery. 6 is a cross-sectional view schematically illustrating a molding process of an arrangement of segments of an electrode assembly. Referring to FIG. 6, the arrangement of the segments can be modified in such a manner as stacking, bending, and winding due to the ease of molding of the fibrous structure to provide cells 1000A, 1000B, and 1000C having various volumes and shapes . The anode or cathode of the electrode assembly 600 in the case CS provides the external electrodes (+, -) of the battery. The batteries 1000A, 1000B, and 1000C can be applied as a small-sized battery that can be attached to clothing, a bag or the like and can be integrated with a cloth of clothes and a bag, or can be applied as a medium- or large-sized battery, such as a power source for an automobile.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be clear to those who have knowledge.

Claims (7)

A first electrode comprising one or more fibrous first structures having polarities of either of an anode and a cathode; And
And a second electrode having a polarity different from that of the first structure and including a second structure of one or more fibrous bodies spirally surrounding the first structure,
Wherein the electrode assembly is provided as a plurality of segments having a predetermined length in a battery case, the segments being disorderly arranged through the separation matrix. The method according to claim 1,
Wherein at least one of the first and second structures includes a current collector core and an active material layer surrounding the current collector core. The method according to claim 1,
And an electrolyte coating layer on at least one of the first and second structures. The method according to claim 1,
Wherein the segments have a structure selected from the group consisting of a spiral shape, a wave shape, a curled shape, and a Velcro shape. The method according to claim 1,
Wherein the segments twist to each other to provide a coarse wire structure. A first electrode comprising one or more fibrous first structures having polarities of either of an anode and a cathode; And
And a second electrode having a polarity different from that of the first structure and including a second structure of one or more fibrous bodies spirally surrounding the first structure,
Wherein the electrode assembly is provided as a plurality of segments having a predetermined length in a battery case, the segments having an arrangement extending in parallel to form at least one virtual plane, the virtual plane of the arrangement being a plurality, And a separator between the electrodes. An arrangement of the electrode assemblies according to claim 1 molded into piles, bends or persimmon foods; And
And a case surrounding the arrangement of the electrode assemblies.

Images