Abstract: An anode for a lithium secondary battery according to embodiments of the present disclosure includes: an anode current collector; and an anode active material layer disposed on at least one surface of the anode current collector, wherein the anode active material layer includes a first anode active material layer and a second anode active material layer disposed on the first anode active material layer, and the diffusivity (D) of the entire anode active material layer obtained through X-ray microscopy (XRM) analysis is 4.6% to 5.8%.

Abstract: A cathode for a lithium secondary battery includes a cathode current collector, and a cathode mixture layer on at least one surface of the cathode current collector. The cathode mixture layer includes a first cathode mixture layer on the cathode current collector, and a second cathode mixture layer on the first cathode mixture layer, the first cathode mixture layer includes a lithium transition metal oxide particle in a form of a single particle containing nickel (Ni), and the second cathode mixture layer includes lithium metal phosphate particles.

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: 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 including a carbon-silicon composite active material, and a second silicon-based active material including a silicon oxide (SiOx, 0<x<2). A content of the first silicon-based active material is in a range from 2 wt % to 40 wt % based on a total weight of the anode active material layer.

Abstract: Provided is an anode for a lithium secondary battery of the present disclosure, comprising: an anode current collector; a first anode mixture layer formed on at least one surface of the anode current collector and including a first silicon-based active material doped with a first metal and a first conductive material; and a second anode mixture layer formed on the first anode mixture layer and including a second silicon-based active material doped with a second metal and a second conductive material, and the first conductive material has a Raman R value according to the following formula 1 that is greater than that of the second conductive material. Raman R=ID/IG??[Formula 1] (In formula 1, ID is a Raman peak intensity value in an absorption region of 1330 to 1380 cm?1, and IG is a Raman peak intensity value in an absorption region of 1550 to 1625 cm?1.

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 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 including a carbon-silicon composite active material, and a second silicon-based active material including a silicon oxide (SiOx, 0<x<2). A content of the first silicon-based active material is in a range from 2 wt % to 40 wt % based on a total weight of the anode active material layer.

Abstract: A lithium secondary battery according to an embodiment includes an electrode assembly 1 in which a first electrode group 2 including at least one first unit cell 10; and a second electrode group 4 including at least one second unit cell 30 are alternately assembled. The first unit cell 10 includes a first-first anode mixture layer 111a on the first anode current collector 110; and a first-second anode mixture layer 111b on the first-first anode mixture layer. The second unit cell 30 includes a second-first anode mixture layer 311a on the second anode current collector 310; and a second-second anode mixture layer 311b on the second-first anode mixture layer. The first-first anode mixture layer 111a includes a carbon-based active material, and each of the first-second anode mixture layer 111b, the second-first anode mixture layer 311a and the second-second anode mixture layer 311b includes a silicon-based active material.

Abstract: Disclosed is an anode including an anode current collector, and an anode active material layer which is disposed on at least one surface of the anode current collector and has a multilayer structure comprising a first anode active material layer and a second anode active material layer. At least one of the first anode active material layer and the second anode active material layer includes a first metal-doped first silicon-based active material, and a doping amount of the first metal is 1.5% by weight to 8% by weight based on a total weight of the first silicon-based active material.

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 secondary battery according to exemplary embodiments of the present disclosure includes: an anode current collector; a first anode active material layer which is disposed on at least one surface of the anode current collector and includes natural graphite and artificial graphite; and a second anode active material layer which is disposed on the first anode active material layer and includes a silicon-based active material, a graphite-based active material and carbon nanotubes. Accordingly, a lithium secondary battery having improved rapid charge/discharge cycle lifespan characteristics may be implemented.

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 and a lithium secondary battery including the same are provided. The anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on a surface of the anode current collector. A Raman R1 value represented by ID/IG and measured on a surface of the anode active material layer is greater than about 0.2 and about 0.5 or less. The Raman R1 value is measured from a Raman spectrum at a laser focus level of 100% using InVia Raman Microscope from Renishaw as a Raman spectrometer.

Abstract: A secondary battery includes a first cathode group in which first cathodes are stacked adjacent to each other, a second cathode group in which second cathodes are stacked adjacent to each other, and anodes facing the first cathode or the second cathode. Each of the first cathodes includes a first cathode current collector and a first cathode active material layer on the first cathode current collector. Each of the second cathodes includes a second cathode current collector and a second cathode active material layer on the second cathode current collector. The second cathode active material layer has a different active material composition or a different stacked structure from that of the first cathode active material layer.

Abstract: An anode for a secondary battery is provided, the anode for a secondary battery including: an anode current collector; a first anode mixture layer formed on at least one surface of the anode current collector, and including a first silicon-based active material and a first conductive material; and a second anode mixture layer formed on the first anode mixture layer, and including a second silicon-based active material and a second conductive material, wherein a content of the first silicon-based active material in the first anode mixture layer is lower than a content of the second silicon-based active material in the second anode mixture layer, and a Radial Breathing Mode (RBM) peak is observed in a Raman spectrum obtained from a surface of the second anode mixture 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 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 including a carbon-silicon composite active material, and a second silicon-based active material including a silicon oxide (SiOx, 0<x<2). A content of the first silicon-based active material is in a range from 2 wt % to 40 wt % based on a total weight of the anode active material layer.

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: A lithium secondary battery is disclosed. In some implementations, the lithium secondary battery includes a positive electrode including a positive electrode active material including lithium metal oxide including nickel (Ni) and a negative electrode including a negative electrode active material including a silicon-based active material, wherein the positive electrode active material includes 10 wt % or more of lithium metal oxide in the form of single particles based on a total weight of the positive electrode active material, and the negative electrode active material includes 1 to 15 wt % of the silicon-based active material based on a total weight of the negative electrode active material.

Abstract: An anode for a secondary battery includes an anode current collector, a first anode mixture layer on at least one surface of the anode current collector, and a second anode mixture layer on the first anode mixture layer. The first anode mixture layer includes a first silicon-based active material having a carbon coating layer formed on a surface, and a first conductive material, the second anode mixture layer includes a second silicon-based active material doped with a metal, and a second conductive material, and the anode for a secondary battery exhibits a Radial Breathing Mode (RBM) peak in a Raman spectrum obtained from a surface of the second anode mixture layer. An influence of volume expansion/contraction of a silicon-based active material during battery charging/discharging may be alleviated.