Abstract: A negative active material, including a silicon-carbon composite including silicon and amorphous carbon, a metal oxide, and a metal silicate.

Abstract: An electronic device includes: a heart rate measurement sensor; at least one processor; and at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the electronic device to at least: obtain heart rate information by using the heart rate measurement sensor, identify the obtained heart rate information and electrocardiogram (ECG)-related symptoms information corresponding to the heart rate information, and generate first data, based on the heart rate information and the ECG-related symptoms information.

Abstract: A negative electrode active material includes a core including a silicon-carbon composite; and a coating layer on a surface of the core, the coating layer including a surfactant and graphene, wherein the negative electrode active material has a ratio (Isecond peak/Ifirst peak) of an intensity of a second peak appearing at 2?=about 45° to about 50° relative to an intensity of a first peak appearing at 2?=about 25° to about 27° of about 0.1 to about 0.4, in an X-ray diffraction analysis using a CuK? ray.

Abstract: A negative electrode active material includes a core including secondary particles in which silicon primary particles and a metal carbide are agglomerated; and an amorphous carbon layer on a surface of the core, wherein the primary particles have a full width at half maximum (FWHM, 111) of greater than about 0.5°.

Abstract: A negative electrode active material, including primary particles including silicon nanoparticles, and a metal coating layer including a metal material surrounding a surface of each of the silicon nanoparticles; a secondary particle where the primary particles are agglomerated; and an amorphous carbon coating layer surrounding a surface of the primary particles and a surface of the secondary particle, wherein the negative electrode active material has a span as defined by Equation 1 of about 1.1 to about 1.6, Span = ( D ? 90 - D ? 10 ) / D ? 50 [ Equation ? 1 ] wherein, D10 indicates a diameter of particles having a cumulative volume of 10 volume % in a particle size distribution, D50 indicates a diameter of particles having a cumulative volume of 50 volume % in the particle size distribution, and D90 indicates a diameter of particles having a cumulative volume of 90 volume % in the particle size distribution.

Abstract: A negative electrode active material, including a core which includes a silicon-carbon composite; and a polymer coating layer on the core including a silicon-carbon composite, wherein the negative electrode active material has a (100) plane peak and a (002) plane peak during an X-ray diffraction measurement using a CuK? ray.

Abstract: A negative electrode active material, including silicon nanoparticles including an amorphous carbon coating layer on a surface of the silicon nanoparticles; and pores, wherein the negative electrode active material has a sphericity as represented by Equation 1 of about 0.9 to about 1.0, and the pores include mesopores, and a ratio of a mesopores volume relative to a total pore volume of the negative electrode active material is about 30% or more and less than about 70%, and Sphericity ? ( S ) = 4 ? ? × A / B 2 [ Equation ? 1 ] in Equation 1, A is an area of the negative electrode active material and B is a circumference of a shape of the negative electrode active material.

Abstract: A negative active material includes a core having a silicon-carbon composite and a polymer coating layer formed on the core, wherein the negative active material has about 1.02 to about 1.6 of a ratio of height of N1s peak occurring at about 400±about 0.5 eV relative to a height of N1s peak occurring at about 405±about 0.5 eV of a bonding energy, and about 1.02 to about 3.0 of a ratio of a height of C1s peak occurring at about 286.5±about 0.5 eV relative to a height of C1s peak occurring at about 290±about 0.5 eV when an X-ray photoelectron spectroscopy (XPS) is measured.

Abstract: A negative active material and a rechargeable lithium battery including the same. The negative active material includes an inorganic supporter in which pores are formed; a silicon layer coated on the inorganic supporter, and a carbon-based material positioned on the pores of the inorganic supporter and a surface of the inorganic supporter.

Abstract: A negative electrode active material composite, including an amorphous carbon matrix, and silicon nanoparticles and crystalline carbon fibers dispersed in the amorphous carbon matrix, the silicon nanoparticles being in contact with a portion or all of the crystalline carbon fibers in the amorphous carbon matrix.

Abstract: A negative active material, including a silicon-carbon composite including silicon and amorphous carbon, a metal oxide, and a metal silicate.

Abstract: A negative active material and a rechargeable lithium battery including the negative active material, the negative active material includes a silicon-carbon composite including nano-silicon and amorphous carbon; an N-doped carbon layer on the silicon-carbon composite; and a coating layer on the N-doped carbon layer, the coating layer including carbon nanotubes.

Abstract: A negative active material and a rechargeable lithium battery including the negative active material. The negative active material includes first, second and third active materials. The first active material is a crystalline carbon. The second active material includes a first core, which includes crystalline carbon and a silicon-based material, and a first carbon coating positioned on the first core. The third active material includes a second core, which includes a silicon-based material, and a second carbon coating layer positioned on the second core.

Abstract: A negative active material, including a first active material including a silicon core and a carbon coating layer on the core, a carbon second active material having an aspect ratio of about 4 to about 100, and a crystalline carbon third active material.

Abstract: A negative electrode and a rechargeable lithium battery including the negative electrode, the negative electrode including a current collector, a negative active material layer, and a functional layer between the current collector and the negative active material layer or on the negative active material layer, the functional layer including nanometal and nanocarbon.

Abstract: A negative active material for a rechargeable lithium battery, the negative active material including, a silicon-carbon composite including silicon and amorphous carbon, and a coating layer positioned on a surface of the silicon-carbon composite the coating layer including a metal hydroxide, and an amount of the coating layer is about 1 wt % to about 10 wt % based on about 100 wt % of the negative active material.

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the negative active material, the negative active material includes a silicon-carbon composite including secondary particles in which nano silicon primary particles are agglomerated, and an amorphous carbon coating layer on a surface of the secondary particles; and sodium silicate.