Abstract: The present invention relates to a cathode active material for a secondary battery and a preparation method thereof, and more particularly, to a lithium composite oxide including a secondary particle formed as primary particles cohere, in which a manganese (Mn) oxide is present in the periphery of the primary particles, a concentration of an Mn oxide in the primary particle has a concentration gradient from the center of the primary particle to a surface of the particle, a concentration of an Mn oxide in the secondary particle has a concentration gradient from a surface of the secondary particle to the center thereof, and a lithium ion migration path is formed in the primary particle, and a preparation method thereof. A secondary battery including the cathode active material for a secondary battery may have high safety, while exhibiting high capacity and high output.

Abstract: A separator for a rechargeable lithium battery includes a substrate; and a coating layer positioned on at least one side of the substrate, wherein a thickness ratio of the coating layer relative to the total thickness of the substrate and the coating layer ranges from about 5% to about 50%, and a loading level of the coating layer ranges from about 1.4 g/m2 to about 9.8 g/m2, and a rechargeable lithium battery including the same is provided.

Abstract: The present invention relates to a reduced-graphene-oxide/silicon-metal-particle composite, a method of manufacturing the composite and an electrode for a secondary battery including the composite. The method of manufacturing the reduced-graphene-oxide/silicon-metal-particle composite includes preparing a reduced-graphene-oxide dispersion solution by reducing graphene oxide formed through cation-pi interaction, preparing a reduced-graphene-oxide/silicon-metal-particle dispersion solution by mixing the reduced-graphene-oxide dispersion solution with silicon metal particles, and manufacturing a composite powder having a core-shell structure by drying the reduced-graphene-oxide/silicon-metal-particle dispersion solution. Thereby, reduced graphene oxide can be formed using the graphene oxide dispersion solution having few defects and high purity obtained through cation-pi interaction, and dried to afford a composite powder having a core-shell structure, which is applicable to an electrode for a secondary battery.

Abstract: A multilayer capacitor includes a capacitor body including a first surface and a second surface opposing each other, a third surface and a fourth surface connected to the first surface and the second surface and opposing each other, and a fifth surface and a sixth surface, a first internal electrode of the first internal electrodes being exposed through the third surface and the fourth surface, a second internal electrode of the second internal electrodes being exposed through the fifth surface and the sixth surface, a first external electrode and a second external electrode disposed in the third surface and the fourth surface of the capacitor body, respectively, the first external electrode and the second external electrode connected to an exposed portion of the first internal electrode, a third external electrode and a fourth external electrode disposed in the fifth surface and the sixth surface of the capacitor body, respectively.

Abstract: A multilayer capacitor includes a capacitor body including first and second internal electrodes disposed alternately in a width direction; first and second external electrodes spaced apart from each other on a mounting surface; and a first insulating layer disposed between the first and second external electrodes, in which the first and second internal electrodes each include a body portion, a first lead portion extending from the body portion toward the mounting surface and electrically connected to the first and second external electrodes, and a second lead portion extending from the body portion toward a surface of the capacitor body opposing the mounting surface, and the first and second lead portions extend from each body portion in a diagonal direction relative to each other.

Abstract: A separator for a rechargeable lithium battery includes a substrate, an organic layer positioned on at least one side of the substrate and including an organic material and an inorganic layer positioned on at least one side of the substrate and including an inorganic material, wherein the organic material includes two or more kinds of organic particles having different particle sizes from each other.

Abstract: A separator for a rechargeable lithium battery includes a substrate; an organic layer on at least one side of the substrate and including an organic material; and an inorganic layer on at least one side of the substrate and including an inorganic material, where the organic material includes two or more organic particles having respective melting points that are different from each other. A rechargeable lithium battery includes the separator.

Abstract: A negative electrode for a rechargeable lithium battery, the negative electrode including: a current collector; a negative active material layer on the current collector; and a coating layer directly contacting the negative active material layer, the coating layer including an organic material and an inorganic material, is disclosed. A rechargeable lithium battery including the same is also disclosed.

Abstract: A multilayer capacitor includes a capacitor body including first and second internal electrodes disposed alternately in a width direction; first and second external electrodes spaced apart from each other on a mounting surface; and a first insulating layer disposed between the first and second external electrodes, in which the first and second internal electrodes each include a body portion, a first lead portion extending from the body portion toward the mounting surface and electrically connected to the first and second external electrodes, and a second lead portion extending from the body portion toward a surface of the capacitor body opposing the mounting surface, and the first and second lead portions extend from each body portion in a diagonal direction relative to each other.

Abstract: A multilayer capacitor includes a ceramic body including a plurality of dielectric layers stacked to be disposed perpendicularly to a mounting surface of the ceramic body, and first and second internal electrodes alternately disposed, with respective dielectric layers interposed therebetween, the first and second internal electrodes being exposed to the mounting surface of the ceramic body and first and second end surfaces of the ceramic body opposing each other, respectively; first and second external electrodes disposed on the ceramic body to be connected to the first and second internal electrodes, respectively; and an insulating layer disposed on the mounting surface of the ceramic body and covering portions of the first and second internal electrodes exposed to the mounting surface but not in contact with the first and second external electrodes.

Abstract: A negative electrode for a rechargeable lithium battery, the negative electrode including: a current collector; a negative active material layer on the current collector; and a coating layer directly contacting the negative active material layer, the coating layer including an organic material and an inorganic material, is disclosed. A rechargeable lithium battery including the same is also disclosed.

Abstract: A capacitor component includes a body including a plurality of dielectric layers having a stacked structure and a plurality of first internal electrodes and a plurality of second internal electrodes alternately disposed with dielectric layers disposed therebetween. A first external electrode is on a first surface and a second surface of the body, on the opposing side of the body, and connected to the plurality of first internal electrodes. A second external electrode is on a third surface and a fourth surface of the body, opposing each other, and connected to one or more of the plurality of second internal electrodes.

Abstract: A separator for a rechargeable lithium battery includes: a substrate; and a coating layer on at least one side of the substrate, the coating layer including an acrylic-based copolymer obtained from polymerization of a (meth)acrylate salt and (meth)acrylonitrile, and a polyvinyl alcohol-based compound. A rechargeable lithium battery including the separator is also provided.

Abstract: There are provided a storage device having an equivalent circuit of an inductor stored therein and a server for providing an equivalent circuit of an inductor. The storage device stores an equivalent circuit. The equivalent circuit includes: a first inductor; and a first functional module connected to the first inductor and adjusting an inductance of the first inductor depending on a direct current (DC) current flowing from a first terminal to a second terminal. The equivalent circuit is an equivalent circuit of an inductor connected between opposite terminals of an inductor device.

Abstract: An electronic component includes an inductor including an inductor body and first and second external electrodes, the first and second external electrodes including first and second body portions and first and second band portions extended from the first and second body portions to portions of an upper surface of the inductor body in a thickness direction, respectively; and first and second metal frames including first and second upper horizontal portions bonded to the first and second band portions, respectively, first and second lower horizontal portions disposed below the inductor body to be spaced apart from each other, and first and second vertical portions connecting end portions of the first and second upper horizontal portions and end portions of the first and second lower horizontal portions to each other and disposed to be spaced apart from the first and second body portions, respectively.

Abstract: The present invention relates to a lithium metal complex oxide and a preparation method thereof, and more particularly, to a lithium metal complex oxide mixed with a metal compound for a lithium reaction, stirred and heat-treated to allow residual lithium and a metal compound for reducing lithium (or a metal compound for lithium reduction) to react with each other on a surface to form a product, which is included in the lithium metal complex oxide, in which the content of Ni3+ is higher than the content of Ni2+ and a ratio of Ni3+/Ni2+ is 1.5 or greater so that life characteristics and capacity characteristics are improved, while residual lithium is reduced, and a preparation method thereof.

Abstract: A capacitor includes a body including a dielectric layer, first internal electrodes and second internal electrodes. Each of the first internal electrodes and each of the second internal electrodes are alternately disposed with the dielectric layer interposed therebetween. A first connection electrode is disposed on a first end surface of the body to connect an end of the first internal electrodes. A second connection electrode is disposed on a second end surface of the body opposite to the first end surface to connect an end of the second internal electrodes. A first insulating layer is disposed on one surface of the body. A first terminal electrode and a second terminal electrode are respectively disposed on opposing end surfaces of the first insulating layer to connect the first connection electrode and the second connection electrode, respectively. A second insulating layer is disposed on another surface of the body.

Abstract: The present invention relates to a cathode active material for a secondary battery and a preparation method thereof, and more particularly, to a lithium composite oxide including a secondary particle formed as primary particles cohere, in which a manganese (Mn) oxide is present in the periphery of the primary particles, a concentration of an Mn oxide in the primary particle has a concentration gradient from the center of the primary particle to a surface of the particle, a concentration of an Mn oxide in the secondary particle has a concentration gradient from a surface of the secondary particle to the center thereof, and a lithium ion migration path is formed in the primary particle, and a preparation method thereof. A secondary battery including the cathode active material for a secondary battery may have high safety, while exhibiting high capacity and high output.

Abstract: A capacitor component includes a body including a plurality of dielectric layers having a stacked structure and a plurality of first internal electrodes and a plurality of second internal electrodes alternately disposed with dielectric layers disposed therebetween. A first external electrode is on a first surface and a second surface of the body, on the opposing side of the body, and connected to the plurality of first internal electrodes. A second external electrode is on a third surface and a fourth surface of the body, opposing each other, and connected to one or more of the plurality of second internal electrodes.

Abstract: A multilayer ceramic electronic component includes a multilayer ceramic capacitor, first and second metal frames, and an insulating cover. The multilayer ceramic capacitor includes a ceramic body having a plurality of dielectric layers stacked together and first and second internal electrodes alternately disposed between pairs of adjacent dielectric layers, and external electrodes disposed on two end surfaces of the ceramic body opposite each other in a length direction orthogonal to the stacking direction. The first and second metal frames are each disposed along a respective one of two end surfaces of the multilayer ceramic capacitor opposite each other in the length direction, and are each disposed along upper and lower surfaces of the multilayer ceramic capacitor. The insulating cover is disposed to enclose the multilayer ceramic capacitor and upper surfaces of the first and second metal frames. A board can have the multilayer ceramic electronic component mounted thereon.