Abstract: An anode active material for a lithium secondary battery according to embodiments of the present disclosure includes composite particles including carbon-based particles including pores, and a silicon-containing coating formed on a surface of the carbon-based particles, wherein the composite particles have an equivalent porosity of 5 to 25.1%, which is defined by Equation 1 below: Equivalent ? porosity ? ( % ) = ( 1 - W c ? a ? r ? b ? o ? n D c ? a ? r ? b ? o ? n + W S ? i D Si W c ? a ? rbon + W Si D P ) * 1 ? 0 ? 0 [ Equation ? 1 ] In Equation 1, Dcarbon is a density (g/cm3) of carbon, DSi is a density (g/cm3) of silicon, DP is a density (g/cm3) of the composite particles measured by a helium (He) pycnometer, WSi is a weight (g) of silicon included in the composite particles, and Wcarbon is a weight (g) of carbon included in the composite particles.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2): 300?106*A/(B2+C2)?12.0*106??(1) 800?A?140,000??(2) wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a silicon-based negative electrode active material including iron and aluminum, wherein in ICP analysis of a negative electrode active material layer including the silicon-based negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) to (3): A / ( B 2 + C 2 ) ? 4 , 500 ( 1 ) 5 ? B ? 1 , 500 ( 2 ) 3 ? C ? 1 , 000 ( 3 ) wherein A is a Li content in ppm, B is an Fe content in ppm, and C is an Al content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

Abstract: Provided is a negative electrode active material for a secondary battery including a core-shell composite including: a core including a silicon oxide (SiOx, 0<x?2) and a metal silicate in at least a part of the silicon oxide; and a shell including a metal-substituted organic compound, wherein the metal of the metal silicate and the substituted metal of the organic compound are independent of each other, wherein each of the metal of the metal silicate and the substituted metal of the organic compound includes an alkali metal or an alkaline earth metal.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a silicon-based negative electrode active material including iron and aluminum, wherein in ICP analysis of a negative electrode active material layer including the silicon-based negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) to (3): A/(B2+C2)?4,500??(1) 5?B?1,500??(2) 3?C?1,000??(3) wherein A is a Li content in ppm, B is an Fe content in ppm, and C is an Al content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. An implementation may provide a negative electrode for a lithium secondary battery including: a Si-containing negative electrode active material, wherein when a value derived according to the following Equation (1) by charging/discharging a lithium secondary battery including a negative electrode and a positive electrode including a Li-containing positive electrode active material n times, discharging the battery to 2.5 V, disassembling the battery to obtain the negative electrode and the positive electrode, and analyzing the negative electrode and the positive electrode is SEIn, a (SEI100?SEI5) value is 10 or less: (1) SEIn=([Si]0/[Si]n?1)?((CLL*CW/CMW*(1?MLi/MTM)*LiMW)/ALL).

Abstract: An anode active material for a secondary battery according to an embodiment includes comprising a lithium-silicon oxide particle that contains Li2Si2O5 and has a phase fraction ratio of 1.0 or less. A content of lithium elements on a surface of the lithium-silicon oxide particle measured through an X-ray photoelectron spectroscopy (XPS) analysis based on the total number of atoms on the surface of the lithium-silicon oxide particle measured through the XPS analysis is 10 atomic % or less.

Abstract: Provided is a lithium secondary battery including a silicon-based anode active material for a lithium secondary battery and an anode formed using the same. The silicon-based anode active material for a lithium secondary battery according to exemplary embodiments includes a surface coated with carbon and doped with lithium. A ratio of a peak area at 102.5 eV to a total area of a peak area at 100 eV, the peak area at 102.5 eV, and a peak area at 104 eV, which appear in an Si2p spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 40% or less, thereby allowing an electrode to be stably manufactured without changing physical properties of the slurry during manufacturing the electrode. In addition, the anode active material for a secondary battery may be usefully used to manufacture a lithium secondary battery having high discharge capacity and high energy density characteristics.

Abstract: Provided is a negative electrode active material for a secondary battery including a core-shell composite including: a core including a silicon oxide (SiOx, 0<x?2) and a metal silicate in at least a part of the silicon oxide; and a shell including a metal-substituted organic compound, wherein the metal of the metal silicate and the substituted metal of the organic compound are independent of each other, wherein each of the metal of the metal silicate and the substituted metal of the organic compound includes an alkali metal or an alkaline earth metal.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2): 300?106*A/(B2+C2)?12.0*106??(1) 800?A?140,000??(2) wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

Abstract: Silicon oxide-based negative electrode active materials and negative electrodes for a secondary battery are disclosed. In an embodiment, a negative electrode active material for a secondary battery includes a silicon oxide particle including a metal silicate; and a hydrocarbon coating layer on the silicon oxide particle, wherein a peak Pa in a Fourier transform infrared (FT-IR) spectral analysis of the negative electrode active material is detected in a range from 2880 cm?1 to 2950 cm?1 and a peak Pb in a FT-IR spectral analysis of the negative electrode active material is detected in a range from 2800 cm?1 to 2865 cm?1.

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 active material for a lithium secondary battery and a lithium secondary battery including the same are provided. The anode active material includes a plurality of composite particles, each composite particle including a silicon-based active material particle including silicon; and a carbon coating layer formed on at least a portion of a surface of the silicon-based active material particle, wherein a relative standard deviation of G/Si peak intensity ratios of a Raman spectrum as defined in Equation 1 measured for each of 50 different composite particles among the plurality of composite particles is 50% or less.

Abstract: An anode active material for a secondary battery according to an embodiment of the present application includes lithium-silicon composite oxide particle. The lithium-silicon composite oxide particles include at least one selected from the group consisting of Li2SiO3 and Li2Si2O5 and have a phase fraction ratio defined by Equation 1 of 1.0 or less. A content of particles having a diameter of less than 3 ?m is 5 vol % or less based on a total volume of the lithium-silicon composite oxide particles.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2): 300?106*A/(B2+C2)?12.0*106??(1) 800?A?140,000??(2) wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a negative electrode active material including: a silicon oxide, lithium, and sodium or potassium, wherein in ICP analysis of a negative electrode active material layer including the negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) and (2): 300?106*A/(B2+C2)?12.0*106??(1) 800?A?140,000??(2) wherein A is a Li content in ppm, B is a Na content in ppm, and C is a K content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

Abstract: Provided are a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode for a lithium secondary battery according to an embodiment of the present invention includes a silicon-based negative electrode active material including iron and aluminum, wherein in ICP analysis of a negative electrode active material layer including the silicon-based negative electrode active material, contents of elements in the negative electrode active material layer satisfy the following Relations (1) to (3): A/(B2+C2)?4,500??(1) 5?B?1,500??(2) 3?C?1,000??(3) wherein A is a Li content in ppm, B is an Fe content in ppm, and C is an Al content in ppm, based on the total weight of the ICP-analyzed negative electrode active material layer.

Abstract: According to embodiments of the present invention, there is provided an anode active material for a lithium secondary battery including a silicon oxide which includes a carbon coating layer on a surface thereof and is doped with magnesium. A ratio of peak area at 1303 eV to a sum of a peak area at 1304.5 eV and a peak area at 1303 eV, which appear in a Mg1s spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 60% or less.

Abstract: An anode active material for a lithium secondary and a lithium second battery including the same are provided. The anode active material includes a plurality of carbon-based particles containing one or more pores therein, and a silicon-containing coating formed inside the pores and/or on a surface of each of the carbon-based particles. A relative standard deviation of D/G peak intensity ratios of a Raman spectrum measured for 50 different carbon-based particles among the plurality of carbon-based particles is 10% or less.

Abstract: Provided is a negative electrode active material for a secondary battery including a core-shell composite including: a core including a silicon oxide (SiOx, 0<x?2) and a metal silicate in at least a part of the silicon oxide; and a shell including a metal-substituted organic compound, wherein the metal of the metal silicate and the substituted metal of the organic compound are independent of each other, wherein each of the metal of the metal silicate and the substituted metal of the organic compound includes an alkali metal or an alkaline earth metal.