WO2019009560A1 - Electrode and lithium secondary battery comprising same - Google Patents

Electrode and lithium secondary battery comprising same Download PDF

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Publication number
WO2019009560A1
WO2019009560A1 PCT/KR2018/007263 KR2018007263W WO2019009560A1 WO 2019009560 A1 WO2019009560 A1 WO 2019009560A1 KR 2018007263 W KR2018007263 W KR 2018007263W WO 2019009560 A1 WO2019009560 A1 WO 2019009560A1
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Prior art keywords
electrode
pore
active material
method according
lithium
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PCT/KR2018/007263
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French (fr)
Korean (ko)
Inventor
조은경
김윤경
손권남
양두경
Original Assignee
주식회사 엘지화학
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Priority to KR20170084684 priority Critical
Priority to KR10-2017-0084684 priority
Priority to KR10-2018-0073277 priority
Priority to KR1020180073277A priority patent/KR20190004651A/en
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Publication of WO2019009560A1 publication Critical patent/WO2019009560A1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134Electrodes based on metals, Si or alloys
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/38Selection of substances as active materials, active masses, active liquids of elements or alloys
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers

Abstract

The present invention relates to an electrode and a lithium secondary battery including the electrode, and the porosity of the electrode is increased by the pore-forming additive, so that the electrode reactivity at high loading and the initial capacity of the electrode can be improved.

Description

Electrode and lithium secondary battery comprising same

This application claims the benefit of priority based on Korean Patent Application No. 10-2017-0084684, filed on July 4, 2017, and Korean Patent Application No. 10-2018-0073277, filed on June 26, 2018, All of which are incorporated herein by reference.

The present invention relates to an electrode for improving capacity and reactivity of a lithium secondary battery and a lithium secondary battery including the same.

Until recently, there has been considerable interest in developing high energy density cells using lithium as the cathode. For example, compared to other lithium-intercalated carbon cathodes and nickel-or-cadmium electrodes, which increase the weight and volume of the cathodes in the presence of non-electroactive materials to reduce the energy density of the cells, Has attracted much attention as an anode active material for an electrochemical cell because of its low weight and high capacity characteristics. A negative electrode mainly comprising a lithium metal negative electrode or a lithium metal provides an opportunity to construct a battery which is lighter and has a higher energy density than a battery such as a lithium ion, a nickel metal hydride or a nickel-cadmium battery. These features are highly desirable for batteries for portable electronic devices, such as cell phones and lab-top computers, where premiums are paid at low weights.

Cathode active materials for lithium batteries of this type are known and include sulfur-containing cathode active materials containing sulfur-sulfur bonds and are used for electrochemical cleavage (reduction) and reforming (oxidation) of sulfur- Rechargeability is achieved.

As described above, the lithium-sulfur battery using lithium and alkali metal as the anode active material and sulfur as the cathode active material has a theoretical energy density of 2,800 Wh / kg and a theoretical capacity of sulfur of 1,675 mAh / g, which is much higher than other battery systems , Hwang has attracted attention as a portable electronic device because of its advantage that it is abundant in resources, cheaper, and environmentally friendly.

However, since sulfur used as a cathode active material of a lithium-sulfur battery is an insulator, it is difficult to transfer electrons generated by an electrochemical reaction, and problems such as dissolution of polysulfide (Li 2 S 8 to Li 2 S 4 ) And slow kinetic of electrochemical reaction due to the low electrical conductivity of lithium sulfide (Li 2 S 2 / Li 2 S).

In this regard, recently, a study has been carried out to improve the performance of a lithium-sulfur battery by improving the kinetic of the redox reaction of sulfur in the course of charging and discharging lithium-sulfur batteries using platinum (Pt), which has been widely used as an electrochemical catalyst has been reported (Hesham Al Salem et al:. "Polysulfide Traps for Controlling Redox Shuttle Process of Li-S Batteries":. J.Am.Chem.Soc, 2015, 137, 11542).

However, since noble metal catalysts such as platinum are expensive, they are not only difficult to commercialize, but also have potential to be poisoned by the redox reaction of sulfur in charge and discharge processes, making it difficult to utilize them as a cathode material for lithium-sulfur batteries.

As described above, there was a limit in improving the performance of the lithium-sulfur battery using the catalyst. Accordingly, development of a technique for improving the performance of a battery including a lithium-sulfur battery has been demanded in other ways such as changing the shape of an electrode.

[Prior Art Literature]

[Patent Literature]

Korean Patent Laid-Open Publication No. 2015-0142832, " A cathode composition for a lithium sulfur battery, a cathode for a lithium sulfur battery including the same,

Korean Patent Laid-Open Publication No. 2016-0118597, " A Whole Solid Lithium Sulfide Secondary Battery Having Oxidized Graphene and Its Manufacturing Method "

As a result of various studies to solve the above problems, the inventors of the present invention have found that, in addition to the electrode active material, the binder and the conductive material, the microporous carbon particles are also added to the electrodes, It was confirmed that the reactivity and the initial capacity of the electrode were improved even under high loading.

Accordingly, an object of the present invention is to provide an electrode having improved porosity.

Another object of the present invention is to provide a lithium secondary battery including the electrode having improved porosity.

In order to achieve the above object, the present invention provides an electrode comprising a pore-forming additive which is porous particles having an average particle diameter (D50) of 1 탆 or more.

The porosity of the pores contained in the porous particles may be 50 to 95%.

The pore-forming additive may include carbon or graphite.

The content of the pore-forming additive may be 0.5 to 5 wt% based on the total weight of the electrode.

The electrode may have a porosity of 64% or more.

In addition, the electrode may include an electrode active material, a binder, a conductive material, and the pore-forming additive.

The electrode active material may be at least one selected from the group consisting of elemental sulfur (S8), sulfur-based compounds, and mixtures thereof.

Also, the binder may be selected from the group consisting of styrene-butadiene rubber-carboxymethylcellulose (SBR-CMC), polyvinyl acetate, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, alkylated polyethylene oxide, crosslinked polyethylene oxide, Poly (ethyl acrylate), polytetrafluoroethylene, polyvinyl chloride, polyacrylic acid, polyvinylidene fluoride, polyvinylidene fluoride, polyvinylidene fluoride, polyvinylidene fluoride, Polyvinylpyridine, polystyrene, derivatives thereof, blends thereof, and copolymers thereof. It is also possible to use at least one of these compounds.

Further, the conductive material may be a carbon-based material selected from carbon black, acetylene black, and ketjen black; And a conductive polymer selected from polyaniline, polythiophene, polyacetylene, and polypyrrole.

The present invention also provides a lithium secondary battery comprising the electrode.

According to the present invention, the porosity of the electrode is increased by the pore-forming additive, so that the reactivity of the electrode is excellent even under high loading and the initial capacity is improved.

When an electrode having increased porosity by the pore-forming additive of the present invention is applied as a positive electrode of a lithium-sulfur battery, a sufficient amount of an electrolyte solution is supported in pores included in the positive electrode to produce a discharge product The polysulfide can be efficiently removed, and the lifetime characteristics of the lithium secondary battery including the lithium-sulfur battery can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing the results of charging / discharging tests of the lithium-sulfur battery produced in Example 1 of the present invention and Comparative Examples 1 and 2. FIG.

FIG. 2 is a graph showing the results of charge-discharge experiments of the lithium-sulfur battery produced in Examples 1 and 2 and Comparative Example 1. FIG.

Hereinafter, the present invention will be described in detail in order to facilitate understanding of the present invention.

The terms and words used in the present specification and claims should not be construed in an ordinary or dictionary sense and the inventor can properly define the concept of the term to describe its invention in the best possible way It should be construed as meaning and concept consistent with the technical idea of the present invention.

electrode

The present invention relates to an electrode having high reactivity and high initial capacity even under high loading.

The electrode of the present invention includes a pore-forming additive having an average particle diameter (D50) of 1 占 퐉 or more.

The shape of the pore-forming additive is not particularly limited, but may be an average particle diameter (D50) of 1 占 퐉 or more, preferably 1 占 퐉 to 20 占 퐉. If the amount is less than the above range, the rate of increase in the degree of porosity of the electrode is insignificant, so that it is not expected to improve the reactivity and initial capacity of the electrode under high loading. Particularly, as the anode of lithium- The lifetime characteristics of the battery may be deteriorated. If the amount is larger than the above range, the particle size is excessively large, which is not suitable as an additive for electrodes.

The pore-forming additive may have an internal porosity of 50% to 95%, preferably 50% to 90%, more preferably 50% to 85%. In this way, the pore- The porosity of the electrode can be improved by the pores included in the pore-forming additive when applied to an electrode.

If the porosity of the pores is less than the above range, the rate of increase in porosity of the electrode is insignificant, so that it is not expected to improve the reactivity and initial capacity of the electrode under high loading. Particularly, The removal efficiency may be lowered and the lifetime characteristics of the battery may be deteriorated. If the above range is exceeded, the durability of the electrode may be deteriorated.

The pore-forming additive may be porous carbon or graphite.

The content of the pore-forming additive may be 0.5 to 10% by weight, preferably 1 to 10% by weight, more preferably 1.5 to 10% by weight based on the total weight of the electrode. If the amount is less than the above range, the rate of increase in the degree of porosity of the electrode is insignificant, so that it is not expected to improve the reactivity and initial capacity of the electrode under high loading. Particularly, as the anode of lithium- The life characteristics of the battery may be deteriorated. If the above range is exceeded, the porosity of the electrode becomes excessively high, and the durability of the electrode may be deteriorated.

The pore-forming additive may be produced by a known method for producing a porous carbon product in the art. For example, the pore-forming additive may be produced by a method comprising the following steps (S1) to (S5) Can be prepared in the form of a product.

(S1) providing a template of an inorganic mold material comprising interconnected pores;

(S2) providing a carbon precursor material;

(S3) infiltrating the pores of the mold with the precursor material;

(S4) carbonizing the precursor material; And

(S5) removing the template to form a porous carbon product.

At this time, the mold material at the (S1) step may be SiO 2.

In addition, the carbon precursor material may be a pitch in the step (S2), and in particular, the " mesophase pitch " may be a carbonaceous material having a regular liquid crystal structure.

The method of removing the template in the step (S5) may be performed by chemical dissociation, wherein the formed porous carbon product may be a pore-forming additive according to the present invention.

The electrode may further include an electrode active material and a conductive material and an electrode active material or an electrode active material, a binder, and a conductive material for allowing electrons to move smoothly in the electrode.

The electrode active material may include, without limitation, a positive electrode active material or a negative electrode active material used in a battery.

For example, when the electrode active material is a cathode active material for a lithium-sulfur battery, the cathode active material may include elemental sulfur (S8), a sulfur-based compound, or a mixture thereof. Specifically, the sulfur-based compound may be Li 2 Sn (n? 1), an organic sulfur compound or a carbon-sulfur polymer ((C 2 S x ) n : x = 2.5 to 50, n?

Further, the conductive material may be a carbon-based material such as carbon black, acetylene black, and Ketjenblack; Or a conductive polymer such as polyaniline, polythiophene, polyacetylene, and polypyrrole, and the conductive material is used in an amount of 5 to 20% by weight, preferably 5 to 15% by weight, more preferably 5 to 10% By weight based on the total weight of the composition. If the content of the conductive material is less than the above range, the effect of improving the conductivity of the conductive material is insignificant. If the content of the conductive material exceeds the above range, the content of the electrode active material becomes relatively small.

The binder may be selected from the group consisting of poly (vinyl acetate), polyvinyl alcohol, polyethylene oxide, polyvinyl pyrrolidone, alkylated polyethylene oxide, crosslinked polyethylene oxide, polyvinyl ether, poly (methyl methacrylate) (Trade name: Kynar), poly (ethyl acrylate), polytetrafluoroethylene, polyvinyl chloride, polyacrylonitrile, polyvinylpyridine, polyvinylidene fluoride, polyvinylidene fluoride, Polystyrene, derivatives thereof, blends, copolymers and the like can be used. The binder may be contained in an amount of 5 to 20 wt%, preferably 5 to 15 wt%, more preferably 5 to 10 wt% based on the total weight of the electrode. If the content of the binder is less than the above range, the effect of improving the adhesion between the electrode active material or between the electrode active material and the current collector may be insufficient. On the other hand, if the content of the electrode active material is less than the above range, There is a concern.

The electrode may be prepared by a conventional method. Specifically, a composition for forming an electrode active material layer, which is prepared by mixing the electrode active material, the conductive material, and the binder in an organic solvent, is coated on the electrode current collector, And optionally rolled. At this time, the pore-forming composition may be mixed with the electrode active material, the conductive material, and the binder in an organic solvent.

At this time, it is preferable to use the organic solvent which can uniformly disperse the cathode active material, the binder and the conductive material, and is easily evaporated. Specific examples thereof include N-methyl-2-pyrrolidone (NMP), acetonitrile, methanol, ethanol, tetrahydrofuran, water and isopropyl alcohol.

The electrode comprising the pore-forming additive according to the present invention may have a porosity of 50% or more, preferably 55% or more, and more preferably 64% or more. Or the porosity may be 64% to 80%.

If the porosity of the electrode is less than the above range, the effect of improving the reactivity and initial capacity of the electrode is insignificant. If the porosity is more than the above range, the durability of the electrode may be deteriorated.

Lithium secondary battery

The present invention also relates to a lithium secondary battery comprising an electrode comprising the pore-forming additive as described above.

The electrode can be used for both the positive electrode and the negative electrode of the lithium secondary battery. However, when used as the positive electrode of the lithium-sulfur battery, the electrode has an effect of removing the polysulfide as a discharge product.

Specifically, the pore-forming additive includes pores such that the porosity is 50 to 95%, and the electrolyte is supported in the pores, and the polysulfide can be removed by the electrolyte in the pores.

The present invention also relates to an electrode comprising a pore-forming agent selected from the group consisting of monomers of an unzipping polymer, a plasticizer, an organic template, and mixtures thereof.

The pore-forming agent may be included in the active material layer of the electrode to generate a gas by a chemical reaction and simultaneously form pores to improve porosity of the electrode.

The electrode is applied to a lithium secondary battery, particularly, a lithium sulfur battery, and exhibits a buffering effect against a change in volume of an active material due to charge and discharge, thereby improving lifetime characteristics of the lithium-sulfur battery.

In the lithium-sulfur battery, the active material in the electrode shrinks and expands as the charge and discharge proceeds. In the present invention, the pore-forming agent as described above is introduced into the electrode to exhibit the buffering effect and the electrolyte-supporting effect on the volume change of the active material.

Specifically, the electrode includes a current collector; And an active material layer formed on the current collector and including an active material, wherein the active material layer comprises S and C; And a pore-forming agent selected from the group consisting of a monomer, a plasticizer, an organic template, and a mixture thereof, of an unzipping polymer, and the active material layer may further include an active material layer such as a binder, , ≪ / RTI >

The pore-forming agent is contained in the active material layer in an amount of 10 wt% or less, preferably 0.1 to 5 wt%, more preferably 0.1 to 2 wt%.

In addition, the active material layer may have an additive density of 0.8 g / cc to 2.0 g / cc, preferably 0.9 to 1.6 g / cc, more preferably 1.19 to 1.3 g / cc. If the mixing density of the active material layer is less than the above range, it is not preferable due to the decrease in capacity per volume, and if it exceeds this range, the volume expansion of the active material layer increases, which is not preferable.

The electrode for a lithium-sulfur battery including the above-described active material layer may be produced by preparing a composition for forming an active material layer containing an active material and an additive for forming pores, applying the composition for forming the active material layer to a current collector, And a step of forming an electrode for a lithium-sulfur battery.

The size, shape, and porosity of the pores formed in the active material layer can be controlled according to the size, shape, and content of the pore-forming additive used in forming the active material layer. Preferably, And may have a porosity of not more than 5% by volume, preferably 55% by volume to 70% by volume, more preferably 60% by volume to 70% by volume.

If the porosity in the active material layer is less than the above range, the buffering effect due to a change in the volume of the active material is insufficient, which is undesirable. If the porosity is above the above range, electrodeconductivity decreases and capacity per volume decreases.

The lithium secondary battery including the electrode including the pore-forming additive exhibits a buffering effect against the volume change of the active material according to the improvement of the porosity to improve the life characteristic of the lithium secondary battery.

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 scope and spirit of the invention as disclosed in the accompanying claims. Changes and modifications may fall within the scope of the appended claims.

Production Example 1: Synthesis of Additive for Pore Formation

After penetrating the pitch as a carbon precursor material into the pores of the non-spherical SiO 2 mold including interconnected pores, the pitch was carbonized at a temperature of 700 ° C to form a porous composite.

Thereafter, the porous composite was supported in a hydrofluoric acid bath to remove the SiO 2 template to synthesize a pore-forming additive in the form of a porous carbon product.

The porosity of the synthesized porous carbon product is 50% or more, and the average particle diameter (D50) is 4 占 퐉.

Example 1: Preparation of a positive electrode and a lithium-sulfur battery containing the same

The SBR-CMC (styrene-butadiene rubber-carboxymethylcellulose) 5 weight%, the carbon black 5 weight% as a conductive material, and the sulfur-carbon composite as a cathode active material were prepared in a ratio of 7: And 2% by weight of the pore-forming additive of Production Example 1 were added to water as a solvent to prepare a positive electrode slurry and then coated on an aluminum foil current collector to prepare a positive electrode by loading at 5 mAh / Respectively.

A lithium foil having a thickness of 200 μm as a cathode and an electrolyte solution containing 2 wt% of a LiNO 3 additive dissolved in 1 M LiTFSI (DME / DOL, 1: 1 volumer ratio) - Sulfur batteries were prepared.

-LiTFSI: bis (trifluoromethane) sulfonamide lithium salt

-DME: dimethoxyethane

-DOL: 1,3-dioxolane

Example 2: Preparation of positive electrode and lithium-sulfur battery containing same

The SBR-CMC (styrene-butadiene rubber-carboxymethylcellulose) 5 weight%, the carbon black 5 weight% as a conductive material, and the sulfur-carbon composite as a cathode active material were prepared in a ratio of 7: And 5% by weight of the pore-forming additive of Production Example 1 were added to water as a solvent to prepare a positive electrode slurry and then coated on an aluminum foil current collector to prepare a positive electrode by loading at 5 mAh / Respectively.

A lithium foil having a thickness of 200 μm as a cathode and an electrolyte solution containing 2 wt% of a LiNO 3 additive dissolved in 1 M LiTFSI (DME / DOL, 1: 1 volumer ratio) - Sulfur batteries were prepared.

-LiTFSI: bis (trifluoromethane) sulfonamide lithium salt

-DME: dimethoxyethane

-DOL: 1,3-dioxolane

Comparative Example 1

A positive electrode and a lithium-sulfur battery were prepared in the same manner as in Example 1 except that no pore-forming additive was used.

Comparative Example 2

Except that porous carbon having an average particle diameter (D50) of less than 1 μm was used in place of the pore-forming additive, but a positive electrode and a lithium-sulfur battery in which porosity improvement effect of the electrode was not obtained due to insufficient pore size .

Unit: wt% Cathode active material Conductive material bookbinder Additive for pore formation Porous carbon sulfur Carbon black SBR-CMC Production Example 1 Example 1 88 5 5 2 0 Example 2 85 5 5 5 0 Comparative Example 1 90 5 5 0 0 Comparative Example 2 88 5 5 0 2

Experimental Example  One

The porosity of each of the prepared positive electrode prepared in Example 1 and Comparative Example 1 was measured. As a result, the porosity of Comparative Example 1, which is a positive electrode containing no pore forming additive, was 56% The porosity of Example 1, which is an anode containing additives, was improved to 64%.

Experimental Example 2

The lithium-sulfur batteries of Examples 1 and 2 and Comparative Examples 1 and 2 were subjected to charge-discharge experiments.

FIG. 1 is a graph showing the results of charge and discharge tests of the lithium-sulfur battery prepared in Example 1 of the present invention and Comparative Examples 1 and 2, and FIG. 2 is a graph showing the results of charge- A graph showing the charge / discharge test results of the battery.

Referring to FIGS. 1 and 2, the charging and discharging tests were performed under the condition of the voltage of 1.5-2.8 V and the condition of 0.1 C, and the experimental results in one cycle were observed. As a result, It can be seen that the lithium-sulfur battery has improved Coulombic efficiency, initial discharge capacity, and reproducibility.

While the present invention has been described in connection with certain exemplary embodiments and drawings, it is to be understood that the present invention is not limited thereto and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

Claims (13)

  1. An electrode comprising a pore-forming additive which is porous particles having an average particle diameter (D50) of 1 占 퐉 or more.
  2. The method according to claim 1,
    Wherein the porosity of the pores contained in the porous particles is 50 to 95%.
  3. The method according to claim 1,
    Wherein the pore-forming additive comprises carbon or graphite.
  4. The method according to claim 1,
    Wherein the content of the pore-forming additive is 0.5 to 5 wt% based on the total weight of the electrode.
  5. The method according to claim 1,
    Wherein the electrode has a porosity of at least 64%.
  6. The method according to claim 1,
    Wherein the electrode comprises an electrode active material, a binder, a conductive material, and the pore-forming additive.
  7. The method according to claim 6,
    Wherein the electrode active material is at least one cathode active material selected from the group consisting of elemental sulfur (S8), a sulfur-based compound, and a mixture thereof.
  8. The method according to claim 6,
    The binder may be selected from the group consisting of styrene-butadiene rubber-carboxymethylcellulose (SBR-CMC), polyvinyl acetate, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, alkylated polyethylene oxide, crosslinked polyethylene oxide, Polyvinylidene fluoride, copolymers of polyhexafluoropropylene and polyvinylidene fluoride, poly (ethyl acrylate), polytetrafluoroethylene, polyvinyl chloride, polyacrylonitrile , Polyvinylpyridine, polystyrene, derivatives thereof, blends thereof, and copolymers thereof.
  9. The method according to claim 6,
    The conductive material may be a carbon-based material selected from carbon black, acetylene black, and ketjen black; And a conductive polymer selected from the group consisting of polyaniline, polythiophene, polyacetylene, and polypyrrole.
  10. A lithium secondary battery comprising the electrode according to any one of claims 1 to 9.
  11. 11. The method of claim 10,
    Wherein the electrode is a positive electrode.
  12. 11. The method of claim 10,
    Wherein the lithium secondary battery is a lithium-sulfur battery.
  13. A pore-forming agent selected from the group consisting of monomers of an unzipping polymer, a plasticizer, an organic template, and mixtures thereof.
PCT/KR2018/007263 2017-07-04 2018-06-27 Electrode and lithium secondary battery comprising same WO2019009560A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086404A (en) * 1976-01-27 1978-04-25 The United States Of America As Represented By The United States Department Of Energy Electrode including porous particles with embedded active material for use in a secondary electrochemical cell
KR20090020933A (en) * 2007-08-24 2009-02-27 삼성에스디아이 주식회사 Electrode for rechargeable lithium battery and rechargeable lithium battery including same
JP2011204571A (en) * 2010-03-26 2011-10-13 Panasonic Corp Electrode for lithium ion battery, its manufacturing method, and lithium ion battery using the electrode
KR20130093740A (en) * 2011-12-26 2013-08-23 재단법인 포항산업과학연구원 Carbon material for supercapacitor electrode and method for manufactoring the same
KR20160031293A (en) * 2014-09-12 2016-03-22 주식회사 엘지화학 Cathode for lithium-sulfur battery and method for preparing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086404A (en) * 1976-01-27 1978-04-25 The United States Of America As Represented By The United States Department Of Energy Electrode including porous particles with embedded active material for use in a secondary electrochemical cell
KR20090020933A (en) * 2007-08-24 2009-02-27 삼성에스디아이 주식회사 Electrode for rechargeable lithium battery and rechargeable lithium battery including same
JP2011204571A (en) * 2010-03-26 2011-10-13 Panasonic Corp Electrode for lithium ion battery, its manufacturing method, and lithium ion battery using the electrode
KR20130093740A (en) * 2011-12-26 2013-08-23 재단법인 포항산업과학연구원 Carbon material for supercapacitor electrode and method for manufactoring the same
KR20160031293A (en) * 2014-09-12 2016-03-22 주식회사 엘지화학 Cathode for lithium-sulfur battery and method for preparing the same

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