KR102003302B1 - Non-Aqueous Slurry Composition, Cathode Thereof, And Lithium Sulfur Batteries Comprising The Same - Google Patents

Abstract

The present invention relates to a non-aqueous positive electrode slurry composition for a lithium-sulfur battery, a positive electrode and a lithium-sulfur battery prepared using the same, and more particularly, to a non-aqueous positive electrode slurry composition using a non-aqueous binder based on an organic solvent and It relates to a positive electrode and a lithium-sulfur battery. The lithium-sulfur barrier according to the present invention has a low moisture content in the electrode because the positive electrode slurry is prepared based on an organic solvent rather than water, thereby preventing the battery from swelling and also causing battery damage. The deterioration phenomenon can be improved. In addition, compared with the aqueous slurry-based battery, there is an effect that the initial charge and discharge characteristics of the lithium-sulfur battery, the discharge cycle characteristics and the charge and discharge efficiency of the lithium-sulfur battery is improved.

Description

Non-Aqueous Slurry Composition, Cathode Thereof, And Lithium Sulfur Batteries Comprising The Same

The present invention relates to a non-aqueous positive electrode slurry composition for a lithium-sulfur battery, a positive electrode and a lithium-sulfur battery prepared therefrom, and more particularly, to a non-aqueous positive electrode slurry composition using a non-aqueous binder based on an organic solvent and prepared from the same. To a positive electrode and a lithium-sulfur battery.

Recently, small size and light weight of electronic products, electronic devices, communication devices, etc. are rapidly progressing, and as the necessity of electric vehicles increases in relation to environmental problems, the demand for improving the performance of secondary batteries used as power sources of these products is also increasing. It is the situation. Among them, lithium secondary batteries have received considerable attention as high-performance batteries because of their high energy density and high standard electrode potential.

In particular, a lithium-sulfur (Li-S) battery is a secondary battery using a sulfur-based material having an SS bond (Sulfur-sulfur bond) as a positive electrode active material and using lithium metal as a negative electrode active material. Sulfur, which is the main material of the positive electrode active material, is very rich in resources, has no toxicity, and has a low weight per atom. In addition, the theoretical discharge capacity of the lithium-sulfur battery is 1672mAh / g-sulfur, and the theoretical energy density is 2,600 Wh / kg, and the theoretical energy density of other battery systems currently being studied (Ni-MH battery: 450 Wh / kg, Li- FeS cells: 480 Wh / kg, Li-MnO ₂ cells: 1,000 Wh / kg, Na-S cells: 800 Wh / kg) is very high compared to the most promising battery that has been developed to date.

During the discharge reaction of the lithium-sulfur battery, an oxidation reaction of lithium occurs at an anode, and a reduction reaction of sulfur occurs at a cathode. Sulfur before discharging has a cyclic S ₈ structure. The oxidation number of S decreases as the SS bond is broken during the reduction reaction (discharge) and the oxidation number of S increases as the SS bond is formed again during the oxidation reaction (charge). Reduction reactions are used to store and generate electrical energy. During this reaction, sulfur is converted to linear polysulfide (Lithium polysulfide, Li ₂ S _x , x = 8, 6, 4, 2) by the reduction reaction in cyclic S ₈ , and eventually this lithium polysulfide is completely reduced. Lithium sulfide (Li ₂ S) is finally produced. Unlike lithium ion batteries, the discharge behavior of lithium-sulfur batteries is characterized by showing the discharge voltage step by step by the process of reduction to each lithium polysulfide.

In general, a method of manufacturing a cathode of a lithium-sulfur battery includes a cathode slurry composition prepared by using water as a solvent and materials such as carboxymethyl cellulose (CMC) and styrene-butadiene rubber (SBR) as a dispersant and a thickener. It is coated on the whole. For this reason, however, residual moisture is present in the anode at about 700 to 1000 PPM, and when moisture is present inside the battery, the water reacts with the electrolyte by the potential energy provided during the charging process. Cell swelling occurs back and forth.

In addition, due to the residual moisture, the electrolyte is decomposed or the active material is deteriorated, and the internal resistance of the battery is increased, so that the initial discharge capacity is expressed as 900 ~ 1100 mAh / g, which is much lower than the theoretical discharge capacity. When repeated, there is a problem in that the life span decreases while the charge / discharge capacity decreases rapidly.

Korean Laid-Open Patent Publication No. 2015-0061874 "Positive electrode for lithium-sulfur battery and its manufacturing method"

As described above, the positive electrode slurry composition for a lithium-sulfur battery manufactured using water as a solvent causes the battery to swell, deteriorate, and the like due to the residual moisture.

Accordingly, an object of the present invention is to provide a non-aqueous cathode slurry composition to improve the phenomenon caused by moisture.

Another object of the present invention is to provide a positive electrode for a lithium-sulfur battery prepared using the non-aqueous positive electrode slurry composition.

In addition, another object of the present invention is to provide a lithium-sulfur battery including a positive electrode for a lithium-sulfur battery prepared using the non-aqueous positive electrode slurry composition.

In order to achieve the above object, the present invention provides a lithium-sulfur battery positive electrode slurry composition comprising a carbon-sulfur (S) composite, a dispersant, a binder, and a non-aqueous solvent, wherein the dispersing agent is polyvinyl butyral (PVB). ), Wherein the binder is N, N-bis [3- (triethoxysilyl) propyl] urea, polyethylene oxide (PEO), poly (vinylidene fluoride) (PVDF), poly (vinylidene fluoride- It provides a cathode slurry composition for a lithium-sulfur battery, characterized in that it comprises one selected from co-hexafluoropropylene) (PVDF-co-HFP), styrene butadiene rubber (SBR) and combinations thereof.

The lithium-sulfur battery according to the present invention has a low moisture content in the electrode because the positive electrode slurry is manufactured based on an organic solvent rather than water, thereby not only preventing the battery from swelling, but also a battery caused by moisture. The deterioration phenomenon can be improved.

In addition, compared with the aqueous slurry-based battery, there is an effect that the initial charge and discharge characteristics of the lithium-sulfur battery, the discharge cycle characteristics and the charge and discharge efficiency of the lithium-sulfur battery is improved.

1 is a graph showing initial charge and discharge curves of a lithium-sulfur battery according to Examples and Comparative Examples of the present invention.
2 is a graph showing the discharge cycle characteristics of the lithium-sulfur battery according to the Examples and Comparative Examples of the present invention.
3 is a graph showing the charge and discharge efficiency of the lithium-sulfur battery according to the Examples and Comparative Examples of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

The positive electrode slurry composition for a lithium-sulfur battery according to the present invention includes a carbon-sulfur (S) composite, a dispersant, a binder, and a non-aqueous solvent, wherein the dispersant comprises polyvinyl butyral (PVB), and the binder Is N, N-bis [3- (triethoxysilyl) propyl] urea (N, N-bis [3- (triethoxysilyl) propyl] Urea), polyethylene oxide (PEO), poly (vinylidene fluoride ) (PVDF), poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP), styrene butadiene rubber (SBR) and combinations thereof.

Carbon-sulfur composite of the present invention is a combination of carbon (C) particles and sulfur (S) particles, the carbon constituting it may be crystalline or amorphous carbon, and is not limited to conductive carbon, for example, natural graphite, artificial graphite , Expanded graphite, graphite such as graphene, active carbon, channel black, denka black, furnace black, thermal black ), Carbon blacks such as contact black, lamp black, acetylene black; It may be one selected from the group consisting of carbon fiber structures, carbon nanostructures such as carbon nanotubes (CNTs), fullerenes, and combinations thereof. In addition, the sulfur material may include elemental sulfur (S ₈ ), a sulfur-based compound or a mixture thereof. Specifically, the sulfur-based compound may be Li ₂ S _n (n ≧ 1), an organic sulfur compound, or a carbon-sulfur polymer ((C ₂ S _x ) _n : x = 2.5 to 50, n ≧ 2).

Preferably, the carbon-sulfur (S) complex is a complex (S / CNT) of sulfur (S) and carbon nanotubes (CNT) or a complex (S / SP) of sulfur (S) and super-P (SP). It is possible to apply, and more preferably, a mixture obtained by mixing them in a predetermined compounding ratio can be applied. For example, a composite of sulfur (S) and carbon nanotubes (CNT) in a weight ratio of 7: 3 and a composite in which sulfur (S) and Super-P (SP) are mixed in a weight ratio of 9: 1 is 1: 1. It can be applied in a weight ratio of.

The content ratio of the dispersant and the binder is preferably included in 5 to 20 parts by weight based on 100 parts by weight of the total positive electrode slurry composition. If the amount is less than 5 parts by weight, the physical properties of the positive electrode are deteriorated, so that the active material and the conductive material in the positive electrode are dropped. If the amount is more than 20 parts by weight, the ratio of the active material and the conductive material in the positive electrode is relatively decreased, which may decrease battery capacity. not.

In addition, the weight ratio of the dispersant and the binder is 1: 5 to 5: 1 is preferable to ensure the dispersion effect of the slurry composition and the adhesive effect to the positive electrode current collector.

The non-aqueous solvent according to the present invention may use materials known in the art. More specifically, the organic solvent is not particularly limited as long as the organic solvent can uniformly disperse the positive electrode active material and the conductive material and can be easily evaporated. Specific examples thereof include ethanol, isopropanol, acetonitrile, toluene, benzene, N-methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), acetone, chloroform, dimethylformamide, cyclohexane, tetrahydrofuran It may be one or two or more mixed solvents selected from the group consisting of polyethylene glycol, and methylene chloride. Preferably it is a mixed solvent containing acetonitrile, toluene and isopropanol, More preferably, the weight ratio may be 4: 2: 4.

The composition may further include a conductive material to impart additional conductivity to the carbon-sulfur (S) composite. As the conductive material, any conductive material may be used without limitation, and for example, a carbon-based material having porosity may be used. Such carbon-based materials include natural graphite, artificial graphite, expanded graphite, graphite-based such as graphene, active carbon-based, channel black, furnace black, Carbon blacks such as thermal black, contact black, lamp black, acetylene black; Carbon fiber-based, carbon nanotubes (CNT), carbon nanostructures such as fullerene (Fullerene) and one selected from the group consisting of a combination thereof may be used. Moreover, metallic fibers, such as a metal mesh; Metallic powders such as copper (Cu), silver (Ag), nickel (Ni) and aluminum (Al); Or organic conductive materials, such as a polyphenylene derivative, can also be used. The conductive materials may be used alone or in combination.

In addition, the mixing for preparing the slurry may be stirred in a conventional manner using a conventional mixer, such as a paste mixer, a high speed shear mixer, a homo mixer, and the like.

The positive electrode slurry may be applied to a current collector, and vacuum dried to form a positive electrode for a lithium-sulfur battery. The slurry may be coated on the current collector in an appropriate thickness according to the viscosity of the slurry and the thickness of the positive electrode to be formed, preferably, it may be appropriately selected within the range of 10nm to 1㎛.

At this time, the method of coating the slurry is not limited, and for example, doctor blade coating, dip coating, gravure coating, slit die coating, spin coating ( It may be manufactured by performing spin coating, comma coating, bar coating, reverse roll coating, screen coating, cap coating, or the like.

The current collector may be generally made of a thickness of 3 ~ 500㎛, and is not particularly limited as long as it has a high conductivity without causing chemical changes in the battery. Specifically, a conductive material such as stainless steel, aluminum, copper, titanium, or the like may be used, and more specifically, a carbon-coated aluminum current collector may be used. The use of an aluminum substrate coated with carbon has an advantage in that the adhesion to the active material is excellent, the contact resistance is low, and the corrosion of polysulfide of aluminum is prevented, compared with the non-carbon coating. The current collector may be in various forms such as film, sheet, foil, net, porous body, foam or nonwoven fabric.

A positive electrode prepared using the slurry composition as described above is preferably applicable as a separator of a lithium-sulfur battery, the positive electrode for a lithium-sulfur battery; A negative electrode containing lithium metal or a lithium alloy as a negative electrode active material; A separator positioned between the anode and the cathode; And an electrolyte impregnated in the negative electrode, the positive electrode, and the separator, and including a lithium salt and an organic solvent. Such lithium-sulfur batteries can be prepared according to conventional methods known to those skilled in the art.

The negative electrode is a negative electrode active material, a material capable of reversibly intercalating or deintercalating lithium ions (Li ⁺ ), a material capable of reacting with lithium ions to reversibly form a lithium-containing compound, lithium metal or lithium Alloys can be used. The material capable of reversibly occluding or releasing the lithium ions (Li ⁺ ) may be, for example, crystalline carbon, amorphous carbon or a mixture thereof. The material capable of reacting with the lithium ions (Li ⁺ ) to form a lithium-containing compound reversibly may be, for example, tin oxide, titanium nitrate or silicon. The lithium alloy is, for example, lithium (Li) and sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), francium (Fr), beryllium (Be), magnesium (Mg), calcium ( It may be an alloy of a metal selected from the group consisting of Ca), strontium (Sr), barium (Ba), radium (Ra), aluminum (Al) and tin (Sn).

In addition, in the process of charging and discharging the lithium-sulfur battery, sulfur used as the positive electrode active material may be changed into an inert material and adhered to the surface of the lithium negative electrode. As described above, inactive sulfur refers to sulfur in which sulfur is no longer able to participate in the electrochemical reaction of the anode through various electrochemical or chemical reactions, and inactive sulfur formed on the surface of the lithium anode is a protective layer of the lithium cathode. It also has the advantage of acting as).

The electrolyte impregnated in the positive electrode, the negative electrode, and the separator is a non-aqueous electrolyte containing lithium salt, and is composed of a lithium salt and an electrolyte solution. In addition, an organic solid electrolyte and an inorganic solid electrolyte are used.

Lithium salt of the present invention is a good material to dissolve in a non-aqueous organic solvent, for example, LiCl, LiBr, LiI, LiClO ₄ , LiBF ₄ , LiB ₁₀ Cl ₁₀ , LiB (Ph) _{4 ,} LiPF ₆ , LiCF ₃ SO ₃ , _{LiCF 3 CO 2, LiAsF 6,} LiSbF 6, LiAlCl 4, LiSO 3 CH 3, LiSO 3 CF 3, LiSCN, LiC (CF 3 SO 2) 3, LiN (CF 3 SO 2) 2, chloroborane lithium, lower aliphatic One or more from the group consisting of lithium carbonate, lithium phenyl borate, imide may be included.

The concentration of the lithium salt is 0.2-2 M, depending on several factors such as the exact composition of the electrolyte mixture, the solubility of the salt, the conductivity of the dissolved salt, the charging and discharging conditions of the cell, the operating temperature and other factors known in the lithium battery art, 0.6 to 2M, more specifically 0.7 to 1.7M. If the amount is less than 0.2M, the conductivity of the electrolyte may be lowered, and thus the performance of the electrolyte may be lowered. If the concentration is more than 2M, the viscosity of the electrolyte may be increased to reduce the mobility of lithium ions (Li ⁺ ).

The non-aqueous organic solvent should dissolve lithium salts well, and as the non-aqueous organic solvent of the present invention, for example, N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, di Ethyl carbonate, ethylmethyl carbonate, gamma-butylo lactone, 1,2-dimethoxy ethane, 1,2-diethoxy ethane, tetrahydroxy franc, 2-methyl tetrahydrofuran, dimethyl sulfoxide, 1, 3-dioxolane, 4-methyl-1,3-dioxene, diethyl ether, formamide, dimethylformamide, dioxolane, acetonitrile, nitromethane, methyl formate, methyl acetate, triester phosphate, trimethoxy methane , Aprotic organic solvents such as dioxolane derivatives, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate derivatives, tetrahydrofuran derivatives, ethers, methyl propionate and ethyl propionate May be used, and the organic solvent may be one or a mixture of two or more organic solvents.

Examples of the organic solid electrolyte include polyethylene derivatives, polyethylene oxide derivatives, polypropylene oxide derivatives, phosphate ester polymers, poly etchation lysine, polyester sulfides, polyvinyl alcohol, polyvinylidene fluoride, and ionic dissociation. Polymers containing groups and the like can be used.

Examples of the inorganic solid electrolyte of the present invention include Li ₃ N, LiI, Li ₅ NI ₂ , Li ₃ N-LiI-LiOH, LiSiO ₄ , LiSiO ₄ -LiI-LiOH, Li ₂ SiS ₃ , Li ₄ SiO ₄ , Nitrides, halides, sulfates, and the like of Li, such as Li ₄ SiO ₄ —LiI-LiOH, Li ₃ PO ₄ —Li ₂ S-SiS ₂ , and the like, may be used.

The electrolyte of the present invention contains, for example, pyridine, triethylphosphite, triethanolamine, cyclic ether, ethylene diamine, n-glyme, hexaphosphate triamide, nitro for the purpose of improving the charge / discharge characteristics, flame retardancy, and the like. Benzene derivatives, sulfur, quinone imine dyes, N-substituted oxazolidinones, N, N-substituted imidazolidines, ethylene glycol dialkyl ethers, ammonium salts, pyrroles, 2-methoxy ethanol, aluminum trichloride and the like may be added. . In some cases, in order to impart nonflammability, a halogen-containing solvent such as carbon tetrachloride and ethylene trifluoride may be further included, and carbon dioxide gas may be further included to improve high temperature storage characteristics, and FEC (Fluoro-ethylene) may be further included. carbonate), propene sultone (PRS), fluoro-propylene carbonate (FPC), and the like.

The electrolyte may be used as a liquid electrolyte or may be used in the form of a solid electrolyte separator. When used as a liquid electrolyte, a physical separator having a function of physically separating an electrode further includes a separator made of porous glass, plastic, ceramic, or polymer.

The stacked electrode assembly may be manufactured by interposing a separator cut to a predetermined size corresponding to the positive electrode plate and the negative electrode plate and interposed between the positive electrode plate and the negative electrode plate having the positive and negative electrodes cut to a predetermined size.

Alternatively, two or more positive electrode plates and negative electrode plates may be arranged on the separator sheet so that the positive electrode and the negative electrode face each other with the separator sheet therebetween, or two or more unit cells in which the two or more positive electrode plates and the negative electrode plates are laminated with the separator interposed therebetween. The stack-and-foldable electrode assembly may be manufactured by arranging on and winding the separator sheet or by bending the separator sheet to a size of an electrode plate or a unit cell.

The battery pack including the lithium-sulfur battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), an unmanned vehicle. It can be used as a power source for airplanes and power storage devices.

Hereinafter, the present invention will be described in detail with reference to Examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the present invention should not be construed as limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

<Example>

(1) to prepare a positive electrode slurry composition

step 1.Acetonitrile, Toluene, Iso-propanol, weight ratio of 4: 2: 4 8.4 g of solvent mixed with 10% by weight of 2% polyvinyl butyral (Polyvinyl bytral) and denka 0.2 g of Denka Black was mixed with ZrO ₂ Balls three times for 10 minutes with a PDM paste mixer (1000/1500 RPM).

step 2. Sulfur (S) and Super P (SP) of S / SP composite 1.7g in the weight ratio of 9: 1 and sulfur (S) and carbon nanotubes (CNT) of the ratio of 7: 3 S / CNT composite 1.7 g was added to the mixture of 1 above and mixed three times for 10 minutes with a PDM paste mixer (1000/1500 RPM).

step 3. PDM was added by adding 10 g of N, N-bis [3- (triethoxysilyl) propyl] urea (N, N-bis [3- (triethoxysilyl) propyl] Urea) to the mixture of 2 A positive electrode slurry composition was prepared by mixing once with a paste mixer (1000/1500 RPM) for 5 minutes.

(2) anode production and lithium-sulfur battery production

The prepared positive electrode slurry composition was coated on one surface of an aluminum (Al) foil with a thickness of 150 μm, and dried at room temperature for 24 hours to prepare a positive electrode having a loading of 1.9 mAh / cm ² . A lithium-sulfur battery including the positive electrode, the negative electrode, a separator interposed therebetween and an electrolyte was manufactured using a conventionally known manufacturing method.

Comparative Example

(1) Preparation of positive electrode slurry composition

step 1. 0.4 g of Denka Black was mixed with PDM paste mixer (1000/1500 RPM) once for 10 minutes in 10 g of 1.2 wt% Carboxymethyl Cellulose (CMC) dissolved in distilled water (DI water). .

step 2. Sulfur (S) and Super P (SP) in a weight ratio of 9: 1 S / SP composite 3.2g with ZrO ₂ Balls was added to the mixture of 1 and the PDM paste mixer (1000/1500 RPM) 5 Mix twice.

step 3. 0.67 g of 42% by weight of styrene-butadiene rubber (SBR: Styrene-Butadiene Rubber) dispersed in distilled water solvent was added to the mixture of 2 and mixed once with a PDM paste mixer (1000/1500 RPM) for 5 minutes. A positive electrode slurry composition was prepared.

(2) anode production and lithium-sulfur battery production

After coating the positive electrode slurry composition of the prepared Example and Comparative Example to a thickness of 150um on one surface of the aluminum (Al) foil, and dried at room temperature for 24 hours to prepare a positive electrode having a loading of 2.3mAh / cm ² . A lithium-sulfur battery including the positive electrode, the negative electrode, a separator interposed therebetween and an electrolyte was manufactured using a conventionally known manufacturing method.

Experimental Example

The lithium and sulfur batteries of Examples and Comparative Examples prepared above were charged and discharged at a rate of 0.1 C after 10 hours of electrolyte impregnation, and data on sulfur activity rate, charge and discharge capacity, and charge and discharge efficiency were recorded. The results are shown in FIGS. 1 to 3.

1 is a graph showing an initial charge and discharge curve, the initial charge and discharge amount was confirmed that the Example was improved to 1100 mAh / g compared to the comparative example is 1000 mAh / g. In addition, Figure 2 is a graph showing the discharge cycle characteristics, it was confirmed that the embodiment maintains the discharge amount until 70 cycles, compared to the comparative example in which the discharge amount is drastically dropped after 50 cycles, Figure 3 is the charge and discharge efficiency As a graph showing, it was confirmed that the Example shows the improved charging and discharging efficiency compared to the Comparative Example.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of the invention.

Claims (9)

In the positive electrode slurry composition for a lithium-sulfur battery comprising a carbon-sulfur (S) composite, a dispersant, a binder and a non-aqueous solvent,
The dispersant includes polyvinyl butyral (PVB),
The binder is N, N-bis [3- (triethoxysilyl) propyl] urea, polyethylene oxide (PEO), poly (vinylidene fluoride) (PVDF), poly (vinylidene fluoride-co-hexafluoro A non-aqueous positive electrode slurry composition for lithium-sulfur batteries, comprising one selected from propylene) (PVDF-co-HFP), styrene butadiene rubber (SBR), and combinations thereof.
The non-aqueous solvent is a non-aqueous positive electrode slurry composition for a lithium-sulfur battery, characterized in that a mixed solvent containing acetonitrile, toluene and isopropanol.
The method of claim 1,
The carbon-sulfur (S) composite is a mixture of sulfur and carbon nanotubes (S / CNT) and sulfur and super-P composite (S / SP), characterized in that the non-aqueous cathode slurry composition for lithium-sulfur batteries .
The method of claim 1,
The weight ratio of the dispersant and the binder is 1: 5 to 5: 1 non-aqueous positive electrode slurry composition for a lithium-sulfur battery.
The method of claim 1,
The content of the dispersant and the binder, based on 100 parts by weight of the total positive electrode slurry composition, characterized in that it comprises 5 to 20 parts by weight of a non-aqueous positive electrode slurry composition for a lithium-sulfur battery.
delete The method of claim 1,
The weight ratio of the mixed solvent of acetonitrile, toluene and isopropanol is 4: 2: 4 non-aqueous positive electrode slurry composition for a lithium-sulfur battery.
The method of claim 1,
The positive electrode slurry composition is a non-aqueous positive electrode slurry composition for a lithium-sulfur battery, characterized in that it further comprises a conductive material.
The positive electrode for a lithium-sulfur battery, which is formed using the positive electrode slurry composition of any one of claims 1 to 4, 6 and 7.
anode; cathode; In the lithium-sulfur battery comprising a separator and an electrolyte interposed therebetween,
The positive electrode is a lithium-sulfur battery, characterized in that formed using the positive electrode slurry composition of any one of claims 1 to 4, 6 and 7.

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