Abstract: An anode active material for a secondary battery includes a carbon-based active material, and silicon-based active material particles doped with magnesium. At least some of the silicon-based active material particles include pores, and a volume ratio of pores having a diameter of 50 nm or less among the pores is 2% or less based on a total volume of the silicon-based active material particles.

Abstract: The technology and implementations disclosed in this patent document generally relate to a lithium secondary battery including: a first unit cell including a first anode including a 1-1 anode mixture layer and a 1-2 anode mixture layer on the 1-1 anode mixture layer, and a second unit cell including a second anode including a 2-1 anode mixture layer and a 2-2 anode mixture layer on the 2-1 anode mixture layer, wherein a weight ratio of the silicon-based active material in the 1-2 anode mixture layer is greater than a weight ratio of the silicon-based active material in the 1-1 anode mixture layer, and a weight ratio of the silicon-based active material in the 2-2 anode mixture layer is less than or equal to a weight ratio of the silicon-based active material in the 2-1 anode mixture layer.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. The anode active material layer includes a carbon-based active material, a first silicon-based active material doped with magnesium and a second silicon-based active material not doped with magnesium. A content of the first silicon-based active material is in a range from 2 wt % to 20 wt % based on a total weight of the anode active material layer.

Abstract: In some implementations, the anode includes a current collector, a first anode mixture layer formed on at least one surface of the current collector, and a second anode mixture layer formed on the first anode mixture layer. The first anode mixture layer and the second anode mixture layer include a carbon-based active material, respectively. The first anode mixture layer includes a first binder, a first silicon-based active material, and a first conductive material. The second anode mixture layer includes a second binder, a second silicon-based active material, and a second conductive material. Contents of the first conductive material and the second conductive material are different from each other with respect to the total combined weight of the first anode mixture layer and the second anode mixture layer. Types of the first silicon-based active material and the second silicon-based active material are different from each other.

Abstract: An anode for a secondary battery is disclosed. In some implementations, the anode includes a current collector, a first anode mixture layer formed on at least one surface of the current collector, and a second anode mixture layer formed on the first anode mixture layer. The first anode mixture layer and the second anode mixture layer include a silicon-based active material, respectively. The first anode mixture layer includes a first carbon-based active material. The second anode mixture layer includes a second carbon-based active material. The first carbon-based active material has an OI value greater than or equal to an OI value of the second carbon-based active material.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. The anode active material layer includes a carbon-based active material, a first silicon-based active material doped with magnesium and a second silicon-based active material not doped with magnesium. A content of the first silicon-based active material is in a range from 2 wt % to 20 wt % based on a total weight of the anode active material layer.

Abstract: An anode for a lithium secondary battery according to exemplary embodiments of the present disclosure includes: an anode current collector; an adhesive layer formed on the anode current collector and includes a first binder; and an anode active material layer formed on the adhesive layer and includes an anode active material including silicon-carbon composite particles and a second binder.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. The anode active material layer includes a carbon-based active material, a first silicon-based active material doped with magnesium and a second silicon-based active material not doped with magnesium. A content of the first silicon-based active material is in a range from 2 wt % to 20 wt % based on a total weight of the anode active material layer.

Abstract: A secondary battery comprising a positive electrode current collector, a first positive electrode mixture layer disposed on the positive electrode current collector and including a first positive electrode active material and a binder, and a second positive electrode mixture layer disposed on the first positive electrode mixture layer and including a second positive electrode active material and a binder. A nickel content of the second positive electrode active material is 80% by weight or less of a nickel content of the first positive electrode active material. By providing a secondary battery including a positive electrode of a multi-layer structure that includes positive electrode active materials having different contents of nickel, a secondary battery capable of improving high-temperature characteristics while maintaining energy density may be provided.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and a first anode active material layer and a second anode active material layer sequentially stacked on a surface of the anode current collector. Each of the first anode active material layer and the second anode active material layer includes an anode active material and a binder. A content of a free binder unbonded with the anode active material in the first anode active material layer based on a weight of the binder included in the first anode active material layer is greater than a content of a free binder unbonded with the anode active material in the second anode active material layer based on a weight of the binder included in the second anode active material layer.

Abstract: In some implementations, the anode includes a current collector, a first anode mixture layer formed on at least one surface of the current collector, and a second anode mixture layer formed on the first anode mixture layer. The first anode mixture layer and the second anode mixture layer include a carbon-based active material, respectively. The first anode mixture layer includes a first binder, a first silicon-based active material, and a first conductive material. The second anode mixture layer includes a second binder, a second silicon-based active material, and a second conductive material. Contents of the first conductive material and the second conductive material are different from each other with respect to the total combined weight of the first anode mixture layer and the second anode mixture layer. Types of the first silicon-based active material and the second silicon-based active material are different from each other.

Abstract: A lithium secondary battery includes an electrolyte solution including a lithium salt, an organic solvent and a CO2 supply source, a cathode including a cathode active material layer that includes a lithium metal oxide particle containing nickel, and an anode including an anode active material layer and a solid electrolyte interface (SEI) layer formed on the anode active material layer. The anode active material layer includes a silicon-based active material. A ratio of a C—O peak intensity to a Li—F peak intensity is 0.38 or more in an X-ray photoelectron spectroscopy spectrum of the SEI layer.

Abstract: In accordance with an embodiment of the present disclosure, there are provided a secondary battery and a battery module including the secondary battery as a unit battery, the secondary battery including an electrode assembly including a first electrode group including a first cathode; and a second electrode group including a second cathode, wherein the first cathode includes a first cathode active material, and the second cathode includes a first cathode active material and a second cathode active material, and wherein the first cathode active material is a lithium-nickel composite oxide having primary particles whose particle diameter is less than or equal to 1 ?m, and the second cathode active material is a lithium-nickel composite oxide having primary particles whose particle diameter is greater than 1 ?m.

Abstract: An anode for a lithium secondary battery includes an anode current collector, a first anode active material layer formed on at least one surface of the anode current collector and including a silicon-based active material and a graphite-based active material, and a second anode active material layer formed on the first anode active material layer and including a porous structure as an active material. The porous structure includes carbon-based particles including pores, and a silicon-containing coating formed at an inside of the pores of the carbon-based particles or on the surface of the carbon-based particles.

Abstract: A negative electrode for a secondary battery includes: a current collector; a first electrode negative active material layer formed on the current collector and containing a first active material; and a second negative electrode active material layer formed on the first negative electrode active material layer and containing a second active material. The second active material is a bimodal active material including active materials having different specific surface areas, a specific surface area (B2) of the second active material is larger than a specific surface area (B1) of the first active material, and the specific surface area of the second active material is an average specific surface area of an active material (2-1-th active material) having a large specific surface area and an active material (2-2-th active material) having a small specific surface area.

Abstract: A negative electrode for a secondary battery includes: a current collector; a first negative electrode active material layer formed on the current collector and containing a first active material; and a second negative electrode active material layer formed on the first negative electrode active material layer and containing a second active material. The second active material is a bimodal active material including small particles and large particles having different particle sizes, a particle size (D2) of the second active material is smaller than a particle size (D1) of the first active material, and the particle size of the second active material is an average particle size of the small particles and the large particles.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer disposed on the anode current collector. The anode active material layer includes a first anode active material layer including a first anode active material and a first binder that includes an acrylate-styrene butadiene copolymer, and a second anode active material layer disposed on the first anode material layer, the second anode active material layer including a second anode active material and a second binder that includes an acrylate-styrene-butadiene copolymer. A peak intensity ratio according to Raman spectroscopy of the first anode active material is smaller than the peak intensity ratio according to Raman spectroscopy of the second anode active material, and the peak intensity ratio according to Raman spectroscopy is represented as ID/IG.

Abstract: The present disclosure relates to a secondary battery including a cathode formed on a cathode current collector and at least one surface of the cathode current collector and comprising a cathodic active material and a binder; an anode formed on an anode current collector and at least one surface of the anode current collector and comprising a anodic active material and a binder; and a separation film disposed between the cathode and the anode, wherein surface roughness (Ra) of the anode is 1.0 ?m or less, and a standard deviation of the surface roughness of the anode is 0.05 or less. An anode prepared according to an example embodiment of the present disclosure has improved surface roughness, and accordingly, electrical resistance of a lithium ion secondary battery can be reduced, and further, long lifespan characteristics are improved.

Abstract: A secondary battery comprising a positive electrode current collector, a first positive electrode mixture layer disposed on the positive electrode current collector and including a first positive electrode active material and a binder, and a second positive electrode mixture layer disposed on the first positive electrode mixture layer and including a second positive electrode active material and a binder. A nickel content of the second positive electrode active material is 80% by weight or less of a nickel content of the first positive electrode active material. By providing a secondary battery including a positive electrode of a multi-layer structure that includes positive electrode active materials having different contents of nickel, a secondary battery capable of improving high-temperature characteristics while maintaining energy density may be provided.