Abstract: A negative active material for a rechargeable lithium battery includes a composite of porous silicon and amorphous carbon, the composite having macropores with a size of about 50 nm or more, and a porosity of about 15% to about 40%.

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery, the negative active material includes a porous silicon-carbon composite that includes silicon, carbon, and magnesium silicate (MgSiO3), wherein the negative active material has a diffraction peak intensity ratio IMgSiO3(610)/ISi(111) of 0.001<IMgSiO3(610)/ISi(111)<0.01, which is a ratio of a diffraction peak intensity IMgSiO3(610) by MgSiO3 at 2?=30° to 32° to a diffraction peak intensity ISi(111) by Si(111) detected at 2?=27.5° to 29.5° in a X-ray diffraction analysis.

Abstract: A negative active material for a rechargeable lithium battery includes a composite carbon particle including a core particle including crystalline-based carbon and a coating layer positioned on the surface of the core particle and including amorphous carbon. A peak intensity (I1620) at 1620 cm?1 ranges from about 0.01 to about 0.1, a peak intensity (I1360) at 1360 cm?1 ranges from about 0.05 to about 0.5, and a peak intensity (I1580 at 1580 cm?1 ranges from about 0.1 to about 0.8 in a Raman spectrum of the composite carbon particle.

Abstract: A negative active material for a rechargeable lithium battery includes a carbon component having a ratio (I1360/I1620) of peak intensity (I1360) at 1360 cm?1 relative to peak intensity (I1620) at 1620 cm?1 ranging from about 1 to about 4.5 measured by Raman spectroscopy.

Abstract: A positive electrode for a rechargeable lithium battery includes a positive active material and activated carbon, wherein an average particle diameter of the activated carbon is about 100% to about 160% relative to 100% of an average particle diameter of the positive active material.

Abstract: An electrolyte for a lithium battery for solid state drive backup power and a lithium battery for solid state drive backup power including the same, the electrolyte including a non-aqueous organic solvent; and a lithium salt, wherein the lithium salt includes LiBF4 and the electrolyte has a molar concentration of the LiBF4 of about 0.8 M to about 1.2 M.

Abstract: The positive active material for a rechargeable lithium battery includes a composite material of a microporous carbon-based material and a lithium composite compound and a carbon layer on the surface of the composite material.

Abstract: A crystalline carbonaceous material with a controlled interlayer spacing and a method of manufacturing the same. In one embodiment, a crystalline carbonaceous material has a layered structure including a plurality of layers and where a filler is present between the layers. The layers with the filler have an interlayer spacing d002 at a (002) plane, and the interlayer spacing d002 is at or between 0.335 nm and 1 nm when its X-ray diffraction is measured using a CuK? ray.

Abstract: A negative electrode for a rechargeable lithium battery that includes a negative active material layer including a carbon-based material having a peak of about 20 degrees to 30 degrees at a (002) plane in an X-ray diffraction pattern using a CuK? ray, and an SEI (solid electrolyte interface) passivation film including at least one material selected from an organic material and an inorganic material and having an average thickness of about 10 nm to about 50 nm on the surface of the active material layer of the electrode.

Abstract: A negative active material for a rechargeable lithium battery includes a carbon component having a ratio (I1360/I1620) of peak intensity (I1360) at 1360 cm?1 relative to peak intensity (I1620) at 1620 cm?1 ranging from about 1 to about 4.5 measured by Raman spectroscopy.

Abstract: Disclosed is a negative electrode for a secondary lithium battery and a secondary lithium battery including the same, wherein the negative electrode includes a current collector and a negative active material layer formed on the current collector, and the negative active material layer includes an additive including a core including a metal oxide and a metal coating layer formed on the core, and a negative active material.

Abstract: An active material for a rechargeable lithium battery is provided with a non-carbon-based material on which nanofiber-shaped carbon having an oxygen-included functional group is grown. The negative active material for a rechargeable lithium battery has good conductivity and cycle life characteristics.

Abstract: Disclosed is a positive electrode according to one embodiment of the present invention that includes a current collector and a positive active material layer on the current collector, wherein the positive active material layer includes a positive active material and activated carbon coated with a fibrous carbon material.

Abstract: Disclosed is a positive electrode according to one embodiment of the present invention that includes a current collector and a positive active material layer on the current collector, wherein the positive active material layer includes a positive active material and activated carbon coated with a fibrous carbon material.

Abstract: A negative active material for a rechargeable lithium battery includes a composite carbon particle including a core particle including crystalline-based carbon and a coating layer positioned on the surface of the core particle and including amorphous carbon. A peak intensity (I1620) at 1620 cm?1 ranges from about 0.01 to about 0.1, a peak intensity (I1360) at 1360 cm?1 ranges from about 0.05 to about 0.5, and a peak intensity (I1580at 1580 cm?1 ranges from about 0.1 to about 0.8 in a Raman spectrum of the composite carbon particle.

Abstract: A rechargeable lithium battery includes a positive electrode including a positive active material and an activated carbon, a negative electrode including a negative active material, and a lithium salt and a non-aqueous organic solvent, wherein the non-aqueous organic solvent includes about 30 volume % to about 90 volume % of propylene carbonate.

Abstract: An electrolyte for a lithium battery for solid state drive backup power and a lithium battery for solid state drive backup power including the same, the electrolyte including a non-aqueous organic solvent; and a lithium salt, wherein the lithium salt includes LiBF4 and the electrolyte has a molar concentration of the LiBF4 of about 0.8 M to about 1.2 M.

Abstract: An active material for a rechargeable lithium battery and a rechargeable battery, the active material including an active material core; and a thin film graphite layer on the core.

Abstract: Disclosed is a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive electrode includes a current collector; and a positive active material layer disposed on the current collector and including a lithium vanadium oxide-based positive active material represented by the following Chemical Formula 1. LixV2-yMyO5??[Chemical Formula 1] In Chemical Formula 1, M is one or more selected from the group consisting of aluminum (Al), magnesium (Mg), zirconium (Zr), titanium (Ti), strontium (Sr), copper (Cu), cobalt (Co), nickel (Ni), manganese (Mn), and a combination thereof, 1<x<4, and 0?y?0.5.

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same. The active material includes a silicon-containing compound represented by the following Chemical Formula 1 where Si exists with a concentration gradient from the surface to the center of the negative active material: SiCx??[Chemical Formula 1] where 1, 0.05?x?1.5.