KR100742739B1 - Thread-type flexible battery - Google Patents

Abstract

The present invention relates to a thread-shaped electrode configured by weaving a thread-shaped electrode in which a single electrode is coated on a thread-shaped current collector, a thread-shaped positive electrode thread and a negative electrode thread in which one thread represents one electrode, and the positive electrode. And it relates to a battery that can be deformed as necessary, such as thread (or string) or cloth by weaving the negative electrode, the electrode for producing a variable battery of the easy-weaving form of the yarn according to the present invention is formed of an electrical conductor Current collectors (b) and (e), and electrodes (c) and (f) formed by coating one material selected from a positive electrode or a negative electrode material on the outer circumferential surfaces of the yarn-shaped current collectors (b) and (e); And an electrolyte (d) serving as a passage for the ions coated on the outer circumferential surfaces of the electrodes (c) and (f). The thread type battery of the present invention configured as described above provides a battery that can be used as a necklace type battery such as a necklace type PDA, a mobile phone, so that the user can supply power to the necklace string itself without putting a separate battery into the equipment. There is an effect that can be supplied and used, it is also a very useful invention that can be usefully applied to various industries because the fabric of the present invention in the form of a radial or twisted weaving can be produced as a variable battery such as cloth.

Real battery, variable battery, thread, weaving, anode chamber, cathode chamber, electrode, current collector, electrolyte.

Description

Thread-type flexible battery that is easy to weave {Thread-type flexible battery}

1 is a cross-sectional view of a thread-shaped electrode coated with an electrolyte after coating one electrode of a positive electrode or a negative electrode on a thread-shaped current collector according to the present invention,

FIG. 2 is a diagram schematically illustrating a process of weaving the positive electrode and the negative electrode of the yarn form of FIG.

Figure 3 is a view showing a variety of variable battery of the form of a string completed by coating a protective film on the thread electrode woven by the stapling of Figure 2,

4 is a view showing a variable battery of a cloth form obtained by weaving two electrodes by the method of FIG.

Figure 5 is a manufacturing process of the seal battery according to the present invention, Figure 5a is a flow chart of the seal battery manufactured by coating all the electrodes and electrolyte according to a preferred embodiment of the present invention, Figure 5b is another preferred embodiment of the present invention Electrode according to the embodiment is a real-cell process diagram prepared by coating and placed in an empty polymer container filled with an electrolyte,

FIG. 6 is a cross-sectional view of the actual battery manufactured by FIGS. 5A and 5B.

7 is a discharge curve of a battery using a NiS electrode coated on a rectangular TiNi current collector and a lithium electrode coated on a rectangular TiNi current collector.

Description of the main parts of the drawing

a: protective coating b or e: current collector of the electrode

c or f: electrode d: electrolyte

100: electrode coated with electrolyte

200, 300, 400: manufactured real battery

The present invention relates to a variable battery of a thread form that is easy to weave, and more particularly, a thread-shaped electrode in which one electrode is coated on a thread-shaped current collector, and a thread-shaped positive electrode thread in which one thread represents one electrode; The present invention relates to a variable battery in the form of a thread formed by weaving a negative electrode thread, and a battery capable of shape deformation as needed, such as a thread (or string) or a cloth, by weaving the positive and negative electrode threads.

Conventional cylindrical batteries have a diameter and length of AA, AAA, etc., and are composed of several types, such as a rectangular parallelepiped cell and a coin-shaped coin cell. Almost no, they were used in the same form as they were manufactured, and the devices using the batteries had a space in which the batteries could be placed in advance, and the batteries were put in the equipment. For example, in the case of the battery in a watch, the battery of a mobile phone, the battery in a camcorder, etc., the shape is determined. Since the conventional cylindrical battery, coin cell, and square battery as described above have a particular shape, deformation is not free and there is a limited problem in use, and deformation such as arbitrarily twisting or bending according to the use of the battery is not free. There was this.

In order to solve the above problems, the present inventors have proposed a patent in the form of a real battery. The patent application of the actual battery of the present invention to form an internal electrode by coating the electrode material on the inner current collector, the outer peripheral surface thereof, to coat the electrolyte on the outer peripheral surface of the inner electrode and to coat another electrode material on the outer peripheral surface of the outer electrode Formed and manufactured by depositing a protective coating to protect the battery from the external current collector and moisture and air on the outer peripheral surface of the external electrode. In other words, the anode and cathode coexist in one room. By the way, the patented invention of the actual battery has the advantage of manufacturing a variable type of battery, but the current collector, the electrode, the electrolyte, the electrode, the current collector protective coating layer in order to manufacture a continuous coating process is complicated In addition, since the positive and negative electrodes exist simultaneously in a single thread, there is a difficulty in that the input and output terminals must be installed inside and outside the yarn, respectively. In addition, since a single positive electrode current collector, a negative electrode current collector, and a protective film are required in one seal, there are disadvantages in that energy density decreases due to more unused sections compared to an electrode active material actually used in a battery.

Accordingly, the present inventors have studied diligently to solve the above-mentioned conventional problems. As a result, the present inventors have found that the conventional problems can be solved by constructing one electrode of an anode or a cathode and an electrolyte on a current collector in the form of a single stranded yarn. The present invention has been completed.

Accordingly, an object of the present invention is to provide a variable battery of a thread type that is easy to be woven in a new structure that solves the complexity of the battery manufacturing process, which is a problem in the conventional seal battery, and the difficulty of connecting terminals with an external power source.

Electrode for manufacturing a variable battery of the form of a thread easy to weave for achieving the above object of the present invention;
Current collectors (b) and (e) in the form of yarns formed of an electrical conductor,
Internal electrodes (c) and (f) formed by coating a positive electrode material or a negative electrode material on the outer circumferential surfaces of the yarn-shaped current collectors (b) and (e);

It is characterized by consisting of an electrolyte (d) is coated on the outer peripheral surface of the internal electrodes (c) and (f) to be a passage of ions.

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The electrode for manufacturing the variable battery of the yarn form of the present invention can be prepared by coating the electrode material on the current collector of the yarn form, then coating the electrolyte to produce a yarn electrode.

In addition, the present invention can easily manufacture a variable battery in the form of a one-dimensional thread, a string, or a two-dimensional cloth by going through a process of weaving the positive electrode thread and the negative electrode thread, which are the thread-shaped electrodes manufactured as described above. . At this time, by coating a protective coating to protect the moisture and air on the prepared battery can be produced a battery that can be used in the air.

In more detail, the seal battery according to the present invention has a positive electrode and a negative electrode in one current collector chamber and is wrapped in another current collector on the outside as in a conventional seal battery, and one seal is not composed of one battery. The negative electrode has a separate thread shape and combines two threads to form a thread-shaped battery. That is, in the present invention, as shown in FIG. 1, the current collector, one electrode of a positive electrode or a negative electrode, and an electrolyte are formed in a single strand. Then, the yarn of the anode (hereinafter referred to as "anode chamber") and the cathode of the cathode (hereinafter referred to as "cathode chamber") are staggered or parallel to each other as shown in FIG. When the electrolyte is contacted between the two electrode chambers using a weaving process, such as, it can act as a battery and a protective film coating on it can form a cell of the complete seal type shown in FIG. As a material for coating the protective film, a conventional polymer resin may be used, but PVC, HDPE, or epoxy resin is preferable, but is not limited thereto. At this time, one cathode chamber and one cathode chamber may be configured, or two to hundreds may be simultaneously formed. It is possible to manufacture the battery in the form of clothes using the existing clothes manufacturing process, such as weaving such a real battery. In addition, as shown in Figure 4 by using a conventional clothes manufacturing process, such as knitting or weaving the anode and cathode yarns in the form of a string and a seed line, two-dimensional cloth or one-dimensional thread or string or three-dimensional using the same Various shapes of batteries, such as shaped clothes, shoes, tents, and hats, can be configured.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings for a preferred embodiment.

In the present invention, the yarn form may have various forms such as a cylindrical shape and a rectangular parallelepiped, but may have a very long length (High aspect ratio) and bendable or bendable in comparison with the cross-sectional area. It has the shape of a thread and has the function of an electrode. Through the process of weaving the positive electrode and the negative electrode, which is the electrode in the form of thread, to manufacture a variable battery in the form of a one-dimensional thread, a string, or a two-dimensional cloth, and at this time, to protect moisture and air on the manufactured battery The protective coating was coated to use in the air.
As a material for coating the protective film, a conventional polymer resin may be used, but PVC, HDPE, or epoxy resin is preferable, but is not limited thereto.

That is, when the positive electrode seal and the negative electrode seal according to the present invention are staggered or contacted in parallel through the same method as in FIG. 2, and the electrolyte contacts between the two electrode chambers, the battery is configured as shown in FIG. 3. In addition, by using a conventional clothes manufacturing process, such as knitting or weaving (200) the electrode thread (anode thread and cathode thread), as shown in Figure 4 two-dimensional fabric or one-dimensional string or three-dimensional clothing using the same Various shapes of batteries such as shoes, tents and hats can be constructed.

In addition, the positive electrode or the negative electrode of the negative electrode 100 according to the present invention preferably has a diameter of 0.1 to 3mm and is five times or more in length compared to the diameter. If the diameter is 0.1 mm or less or 3 mm or more, it is not preferable for weaving. In addition, if the length is too short, not more than 5 times the diameter is not practical because it is not preferable, and the upper limit is not particularly limited to those skilled in the art and the length will be easily determined according to the intended use.

Figure 5a is an embodiment of a preferred manufacturing process of a real battery according to the present invention, consisting of the following steps.

Forming an internal electrode by coating an electrode material on an outer circumferential surface of the current collector;

It consists of the step of coating the electrolyte on the outer peripheral surface of the inner electrode (S2).

By the steps (S1) and (S2), as shown in Figure 5a, by coating the electrode material on the outer peripheral surface of each of the current collector (b) and (e) having a bendable or bendable shape of the internal electrode (c ) And (f), and using the technique of coating the electrolyte (d) on the outer surface of the inner electrodes (c) and (f) it can be produced a real electrode 100 that can be used as a positive electrode or a negative electrode, The seal electrode 100 is preferably formed in a structure having a cross-sectional diameter (epuibalant diameter) of 1 cm or less and 5 times or more in length compared to the diameter.

After attaching the two seal electrodes, the seal battery 300 may be formed by coating with a protective coating (S3).

In each of the above steps (S1) and (S2), as the coating method of the electrode material and the electrolyte for producing the real electrode, thermal spraying and hot dip plating, vacuum deposition, sputtering, ion plating, molecular beam epitaxy, heat, Chemical vapor deposition using light and plasma, a dry method such as clad and the like, a wet method using an electrochemical reaction, and a direct coating method may be applied.

As the materials of the current collectors (b) and (e), alloys such as TiNi-based alloys having good elastic properties, pure metals such as copper and aluminum, pure metals coated with carbon, conductive materials such as carbon and carbon fibers, and conductive polymers such as polypyrrole The material used for a normal electrical power collector etc. is suitable, and the shape is suitable for a thread shape and a cylindrical shape.

In using the internal electrodes (c) and (f), when one electrode is used as a negative electrode, the other electrode is used as a positive electrode and vice versa, and the negative electrode material is lithium, sodium, zinc as an electrode material. , Metals such as magnesium, cadmium, hydrogen storage alloy, lead, nonmetals such as carbon, and polymer negative electrode materials such as organo sulfur are preferable. The positive electrode material is preferably used as a conventional positive electrode material such as sulfur transition metal oxides such as sulfur, metal sulfide, LiCoO ₂ , SOCl ₂ , MnO ₂ , Ag ₂ O, Cl ₂ , NiCl ₂ , NiOOH, polymer electrode The negative electrode material and the positive electrode material may be prepared using a powder, a slurry using a powder, a solution, or the like, or may be manufactured in a thin film form using a coating.

The electrolyte (d) serves to exchange ions of the battery between the internal electrodes (c) and (f), and the electrolyte (d) is a PEO, PVdF, PMMA, PAN, PVAC, etc. It is preferable to use ordinary electrolytes such as used gel, solid and porous polymer electrolytes, sulfide-based, LiPON, and oxide-based solid electrolytes.

Figure 5b is another preferred embodiment showing the manufacturing process of the actual battery of the present invention, the two electrodes prepared by the method as shown in Figure 5a to be prepared by filling the electrolyte between the two electrodes in a cylindrical container coated with a polymer material It is characterized by the following steps.

Forming an internal electrode by coating an electrode material on two outer circumferential surfaces of the current collector;

Inserting the inner electrode into a cylindrical container coated with a polymer material (S12);

The internal structure of the real battery 400 is formed by filling an electrolyte between the internal electrodes (S13).

In the step (S11), the method described in Figure 5a is used as the coating method of the electrode.

The current collectors (b) and (f), the internal electrodes (c) and (e), and the protective coating part (a) of FIG. 5B described above may use the same materials as those described with reference to FIG. 5A.

The electrolyte (d) is prepared to exchange ions of the battery between the internal electrodes (c) and (e), and the electrolyte (d) is formed of an organic solvent such as EC, PC, TG, or an electrode material, which is a liquid electrolyte. It is preferable to use conventional electrolytes such as a water-soluble electrolyte such as KOH and NaOH, and gel, solid and porous polymer electrolytes, sulfide-based, LiPON, and oxide-based solid electrolytes using PEO, PVdF, PMMA, PAN, and PVAC. desirable.

6 illustrates a cross-sectional view of a real battery manufactured according to the manufacturing process illustrated in FIGS. 5A and 5B.

In addition, the battery according to the present invention can be manufactured into a thread-shaped battery having various cross sections such as square, sawtooth, triangle, etc. in addition to the cylindrical and semi-cylindrical cross sections shown in FIG. It goes without saying that the mold attitude of the actual battery manufactured by overlapping is possible.

Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to this.

<Example>

The electrode material NiS ₂ was deposited on the surface of the current collector TiNi having a bendable or bent shape, and then the other electrode material Li was deposited on the surface of the current collector TiNi having a bendable or bent shape. The two electrodes were coated using PVdF as an electrolyte. The electrode was manufactured by overlapping the two electrodes coated with the electrolyte to form a protective coating protecting the battery from moisture and air.

Experimental Example

Discharge experiments were conducted using the electrodes prepared according to the above examples, and the results are shown in FIG. 7. As shown in FIG. 7, it can be seen that the yarn-shaped electrode manufactured according to the present invention exhibits good discharge characteristics.

The thread-shaped battery of the present invention configured as described above provides a battery which can be used as a necklace-type battery such as a necklace-type PDA, a mobile phone, etc. in a simpler manner than a conventional manufacturing method, so that a user can use a separate battery in the equipment. There is an effect that can be used by supplying power to the necklace string itself without inserting, and also can be produced as a variable battery, such as cloth form when weaving the battery of the thread form of the present invention in a radial or twisted form, so that the thinner and more various forms It is a very useful invention that can be usefully applied to various industries because it is possible to manufacture a new battery of various shapes that can be modified.

Claims (13)

delete The positive electrode or the negative electrode is formed by coating a positive electrode material or a negative electrode material on the outer shape of the current collectors (b) and (e) in the form of an electric conductor, and the outer circumferential surfaces of the current collectors (b) and (e) in the form of an electric conductor. It consists of a yarn consisting of internal electrodes (c) and (f), and an electrolyte (d) coated on the outer peripheral surfaces of the internal electrodes (c) and (f) to be a passage of ions, Any one electrode of the negative electrode of the cathode or the positive electrode of one or more of the yarn form is surrounded by a radial weaving method, yarn-shaped cell, characterized in that the protective coating on the outside. The yarn cell according to claim 2, wherein the yarn cathode and the cathode are twisted together by a twisting weaving method, and a protective coating is applied to the outside thereof. The three-dimensional battery according to claim 2 or 3, wherein the thread-shaped battery is woven in a mesh form by a fabric weaving method, and a protective coating is applied to the outside thereof. 4. The yarn-shaped battery according to claim 2 or 3, wherein the yarn-shaped cathode or anode has a diameter of 0.1 to 3 mm and a length is five times or more relative to the diameter. The electrode material according to claim 2 or 3, wherein the electrode material comprises lithium, sodium, zinc, magnesium, cadmium, hydrogen storage alloy, metals containing lead, nonmetals containing carbon or organo sulfur. A negative electrode material selected from the group consisting of a polymer electrode material, or a sulfur and metal sulfide, a lithium transition metal oxide including LiCoO ₂ , a polymer electrode comprising SOCl ₂ , MnO ₂ , Ag ₂ O, Cl ₂ , NiCl ₂ or NiOOH The positive electrode battery, characterized in that the positive electrode material selected from the group consisting of materials. 4. The method according to claim 2 or 3, wherein the electrolyte (d) is an organic solvent containing EC, PC or TG, which is a liquid electrolyte, or a water-soluble electrolyte using KOH or NaOH, PEO, PVdF, PMMA, PAN or PVAC. A real-type battery, characterized in that selected from the group consisting of gel, solid or porous polymer electrolyte, sulfide-based, LiPON or oxide-based solid electrolyte. According to claim 2 or 3, wherein the current collectors (b) and (e) are TiNi-based alloys, pure metals including copper or aluminum, carbon-coated pure metal, conductive material of carbon or carbon fiber, polypyrrole A yarn-shaped battery, characterized in that used in a yarn shape or a cylinder selected from the group consisting of a conductive polymer comprising a conductive polymer comprising a conductive polymer added to the conductive polymer and a fiber comprising a kevlar. Coating the negative electrode material or the positive electrode material on the outer circumferential surfaces of the two chamber current collectors, respectively, to form an inner electrode for the positive electrode and the negative electrode, coating an electrolyte on the outer circumferential surface of each inner electrode, and attaching the inner electrode to the protective coating. In manufacturing a battery, one of the seal-type positive electrode or negative electrode inner electrode is surrounded by a radial weaving method with one or more other negative electrode or positive electrode inner electrode, or twist the inner electrode for the positive electrode and the negative electrode inner electrode A method of manufacturing a yarn-type battery, characterized in that by twisting each other by a mold weaving method to produce a yarn-shaped battery and coating a protective coating on the outside thereof. A negative electrode material or a positive electrode material is coated on two outer surface of the current collector to form a positive electrode and a negative electrode internal electrode, and an electrolyte is coated on each of the internal electrode outer circumferential surfaces, and one of the internal electrode for the positive electrode or the negative electrode is coated. At least one other cathode or anode inner electrode is surrounded by a radial weaving method, or the cathode inner electrode and the cathode inner electrode are twisted together by a twisted weaving method to produce a thread-shaped cell, and then a protective coating is coated on the outside thereof. Preparing a manufactured real-type battery and After weaving the thread-shaped battery into a mesh form by a cloth weaving method, coating a protective coating on the outside thereof. Method for producing a three-dimensional shape battery, characterized in that consisting of. The method of claim 9, wherein the coating method of the electrode material and the electrolyte is sprayed or hot-dipped, vacuum deposition, sputtering, ion plating, molecular beam epitaxy, chemical vapor deposition using heat, light or plasma, and a dry method including a clad. And a wet method using an electrical and chemical reaction, or a directly applied pasting method. delete The method of claim 10, wherein the coating method of the electrode material and the electrolyte is thermal spraying or hot dip coating, vacuum deposition, sputtering, ion plating, molecular beam epitaxy, chemical vapor deposition using heat, light or plasma, and a dry method including a clad. And a wet method using an electrical and chemical reaction, or a directly applied pasting method.

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