Abstract: A method of preparing a negative electrode for a lithium secondary battery, which includes forming a negative electrode mixture layer including a negative electrode active material on a negative electrode current collector, disposing lithium metal powder on at least a part of the negative electrode mixture layer, pressing the negative electrode mixture layer on which the lithium metal powder is disposed, wetting the pressed negative electrode mixture layer with a first electrolyte solution, and drying the wet negative electrode mixture layer. A battery including the negative electrode of the present invention has enhanced rapid charge/discharge characteristics and enhanced lifespan characteristics.

Abstract: A method for producing a negative electrode active material, including mixing a carbonaceous core and a first pitch to form a first mixture and performing a first heat treatment of the first mixture to form composite particles, and mixing the composite particles and a second pitch to form a second mixture and performing a second heat treatment of the second mixture.

Abstract: A negative electrode active material including natural graphite, wherein a D90/D10, which is the ratio of D90 to D10, is 2.20 or less, a D50 is 6 ?m to 11 ?m, and a BET specific surface area is 2.2 m2/g or less.

Abstract: An anode active material for secondary batteries which has improved cycle swelling characteristics and rapid charge performance, an anode comprising same, and a method for manufacturing same, in which the anode active material is manufactured by modifying the surface of natural graphite particles. The natural graphite particles have a Dmax/Dmin value of 1.6 to 2.1 in the particle size distribution thereof and have, formed in the surface thereof, pores having a diameter of 0.5 ?m to 2.0 ?m.

Abstract: An anode active material for a secondary battery that has improved cycle swelling properties and rapid charge performance, an anode comprising same, and a method for manufacturing same. The anode active material is a mixture of artificial graphite and spherical natural graphite, wherein the spherical natural graphite has an average particle diameter (D 50) of 12 ?m or less, with D 90-D 10 value ranging from 5 ?m to 12 ?m.

Abstract: A negative electrode for a lithium secondary battery and a lithium secondary battery including the negative electrode are disclosed. The negative electrode includes a negative electrode current collector, a first negative electrode active material layer present on the negative electrode current collector, and a second negative electrode active material layer present on the first negative electrode active material layer. The first negative electrode active material layer includes two or more kinds of first negative electrode active materials, and the second negative electrode active material layer includes a second negative electrode active material having swelling that is smaller than that of the first negative electrode active material layer. Therefore, the surface of the negative electrode does not exhibit deformation during pre-lithiation.

Abstract: A separator including: a porous polymer substrate having a plurality of pores; and a coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of lithium-containing composite particles and a binder positioned on the whole or a part of the surface of the lithium-containing composite particles to connect and fix the lithium-containing composite particles with each other, wherein the lithium-containing composite particles includes a lithiated compound and a passivation film formed on the surface of the lithiated compound, and the passivation film includes a solid electrolyte interface (SEI). A lithium secondary battery including the separator and a method for manufacturing the lithium secondary battery are also provided.

Abstract: An anode active material for a secondary battery, which has improved cycle swelling properties and rapid charge performance, an anode comprising an anode active material for a secondary battery, and a method for manufacturing same. The anode active material is a mixture of scaly natural graphite and spherical natural graphite. An average particle diameter (D50) of the scaly natural graphite is 10 ?m to 15 ?m and an average particle diameter (D50) of the spherical natural graphite is 14 ?m or less.

Abstract: A method of manufacturing a negative electrode for a lithium secondary battery, the method includes forming a negative electrode active material layer on a negative electrode current collector to manufacture a negative electrode assembly, and pre-lithiating the negative electrode assembly. The pre-lithiating of the negative electrode assembly includes a first pre-lithiation step of performing pre-lithiation by impregnating the negative electrode assembly with a first pre-lithiation solution and a second pre-lithiation step of performing pre-lithiation by impregnating the negative electrode assembly with a second pre-lithiation solution after the first pre-lithiation step. The first pre-lithiation solution includes an ionizable first lithium salt, a first organic solvent, and a first additive. The second pre-lithiation solution includes an ionizable second lithium salt, a second organic solvent, and a second additive.

Abstract: A negative electrode for a lithium secondary battery including a negative electrode current collector and a negative electrode active material layer formed on at least one surface of the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material including artificial graphite particles, and the negative electrode has a pore resistance Rp of 6? or less.

Abstract: A method of preparing a negative electrode which includes preparing a negative electrode structure including expanded natural graphite, impregnating the negative electrode structure with a pre-lithiation solution to form an impregnated negative electrode structure, and pre-lithiating the impregnated negative electrode structure by electrochemically charging the impregnated negative electrode structure to 10% to 20% of charge capacity of the negative electrode structure.

Abstract: A negative electrode active material which includes artificial graphite particles, and sulfur distributed in the artificial graphite particles, wherein the sulfur is present in an amount of 15 ppm to 40 ppm. With respect to a negative electrode and a secondary battery which include the negative electrode active material, output characteristics and capacity characteristics may be simultaneously improved, and initial efficiency may be improved.

Abstract: A negative electrode active material including artificial graphite particle, wherein a thermal expansion coefficient measured by a specific method is in a range of 108×10?6/K to 150×10?6/K. The negative electrode active material has excellent adhesion to an electrode, and has excellent processability and long-term cycle life characteristics accordingly, and the negative electrode including the negative electrode active material has high capacity and excellent initial efficiency.

Abstract: A negative electrode material including natural graphite particles having a BET specific surface area ranging from 1.0 m2/g to 2.4 m2/g, and artificial graphite particles having a BET specific surface area ranging from 0.5 m2/g to 2.0 m2/g. An average particle diameter (D50) of the natural graphite particles is larger than an average particle diameter (D50) of the artificial graphite particles.

Abstract: A separator including: a porous polymer substrate having a plurality of pores; and a coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of lithium-containing composite particles and a binder positioned on the whole or a part of the surface of the lithium-containing composite particles to connect and fix the lithium-containing composite particles with each other, wherein the lithium-containing composite particles includes a lithiated compound and a passivation film formed on the surface of the lithiated compound, and the passivation film includes a solid electrolyte interface (SEI). A lithium secondary battery including the separator and a method for manufacturing the lithium secondary battery are also provided.

Abstract: The present invention relates to a negative electrode for a secondary battery which comprises a negative electrode collector, a negative electrode active material layer formed on the negative electrode collector, and a lithium metal layer, wherein an adhesive layer is disposed between the negative electrode active material layer and the lithium metal layer, and the lithium metal layer comprises lithium and metal oxide in a weight ratio of 50:50 to 99:1.

Abstract: A negative electrode including: a negative electrode current collector; and a negative electrode active material layer on at least one surface of the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material, wherein the negative electrode active material includes natural graphite particles, and has a particle strength of 40 MPa to 200 MPa when being plastically deformed.

Abstract: Disclosed is a negative electrode, including: a current collector; and a negative electrode active material layer disposed on at least one surface of the current collector, and having a negative electrode active material layer containing an artificial graphite, single-walled carbon nanotubes (SWCNTs) and a binder polymer, wherein the negative electrode active material layer includes a lower layer region facing the current collector, and an upper layer region facing the lower layer region and extended to the surface of the negative electrode active material layer, the content of the single-walled carbon nanotubes is 0.003-0.07 parts by weight based on 100 parts by weight of the lower layer region, the single-walled carbon nanotubes have an average diameter of 0.5-15 nm, and the upper layer region includes no single-walled carbon nanotubes (SWCNTs). A method for manufacturing the negative electrode and a lithium secondary battery including the negative electrode are also disclosed.

Abstract: An electrode drying method including: constant-rate-drying an electrode substrate coated with an electrode slurry while the electrode substrate is moved in a state that the electrode substrate makes a tilt angle with a horizontal plane; and falling-rate-drying the electrode substrate while the electrode substrate is horizontally moved. The electrode drying method and related system provide suppression of a floating phenomenon of binder elements during a drying process of an electrode and improve adhesive force between an electrode mixture layer and an electrode current collector.

Abstract: A negative electrode whose rapid charging performance and lifetime characteristics are excellent and a secondary battery including the negative electrode. The negative electrode includes a current collector and a negative electrode active material layer on at least one surface of the current collector. The negative electrode active material layer includes a negative electrode active material. The negative electrode active material includes uncoated artificial graphite particles consisting of secondary particles formed by agglomerating a plurality of primary particles, the primary particles have an average particle diameter (D50) of 7 ?m to 10 ?m, the secondary particles have an average particle diameter (D50) of 15 ?m to 20 ?m, and the uncoated artificial graphite particles have a crystallite size along the a-axis (La(100)) of 200 nm to 300 nm and a crystallite size along the c-axis (Lc(002)) of 50 nm to 100 nm as analyzed by XRD.