Abstract: A cathode active material for a lithium secondary battery includes a nickel-based lithium metal oxide particle doped with Zr and Al. The nickel-based lithium metal oxide particle includes a core portion having a constant molar content of nickel, and a shell portion surrounding an outer surface of the core portion and having a concentration gradient in which a molar content of nickel gradually decreases in a direction from an interface with the core portion to an outermost periphery. The core portion and the shell portion are doped with Al and Zr.

Abstract: The present invention relates to a positive electrode additive for a lithium secondary battery, a manufacturing method thereof, a positive electrode for a lithium secondary battery including the same, and a lithium secondary battery including the same. The positive electrode additive for a lithium secondary battery according to an exemplary embodiment of the present invention is represented by Chemical Formula 1 below. Li6xCo1-yMyO4??[Chemical Formula 1] (In the Chemical Formula 1, 0.9?x?1.1, 0<y?0.1, My=BaWb, 0?a?0.1, 0?b?0.1, and, a and b are not simultaneously 0.) Another positive electrode additive for a lithium secondary battery according to an exemplary embodiment of the present invention includes a core represented by Chemical Formula 2 below; and a coating layer comprising at least one of boron (B) and tungsten (W). Li6xCoO4??[Chemical Formula 2] (In the Chemical Formula 2, 0.9?x?1.1.

Abstract: A positive active material for a lithium secondary battery and a lithium secondary battery including the same are provided, wherein the positive active material includes lithium, nickel, cobalt, manganese, and a doping element, and the doping element may include Zr, Al, and Ti.

Abstract: The present invention relates to an all-solid-state battery and a manufacturing method thereof. An all-solid-state battery according to an embodiment of the present invention includes: a positive electrode positioned on a positive electrode current collector; a negative electrode positioned on a negative electrode current collector; and a solid-state electrolyte layer positioned between the positive electrode and the negative electrode, wherein the positive electrode includes a positive electrode active material and a solid-state electrolyte, and concentrations of the positive electrode active material and the solid-state electrolyte have a stepwise concentration gradient in which the concentration of the positive electrode active material to the solid-state electrolyte decreases from a side closer to the positive electrode current collector toward a side closer to the solid-state electrolyte layer.

Abstract: The present disclosure relates to a positive electrode active material for lithium secondary battery comprising a first compound represented by Chemical Formula 1, and a second compound represented by Chemical Formula 2, wherein, a content of the first compound is 65 wt % or more based on 100 wt % of the positive electrode active material, and a lithium secondary battery comprising the same. Lia1Nib1Coc1Mnd1N1e1M2f1O2-f1 ??[Chemical Formula 1] Lia2Nib2Coc2Mnd2M3e2M4f2O2-f2 ??[Chemical Formula 2] wherein, each composition and molar ratio of Chemical Formulas 1 and 2 are as defined in the specification.

Abstract: A positive active material, a manufacturing method thereof, and a lithium secondary battery including the same are disclosed, and a positive active material including lithium metal oxide particles in a secondary particle form including primary particles, wherein the secondary particle surface includes planar primary particles with a narrow angle of 70 to 90° from among angles between a c axis of the primary particles and a straight line connecting a virtual point of a center of the primary particle and a center point of the secondary particle may be provided.

Abstract: The present invention provides a cathode active material for a lithium secondary battery comprising secondary particles in which primary particles represented by Chemical Formula 1 below are aggregated, wherein the average particle size (D50) of the secondary particles is 2.5 ?m or more and 7 ?m or less, and the average value of the sphericity coefficient, which is the ratio (l/w) of the long axis length (l) to the short axis length (w) of the secondary particles, is 1.0 to 1.25.

Abstract: The present disclosure relates to a cathode active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery comprising same, and the cathode active material includes a lithium nickel cobalt manganese-based oxide represented by Chemical Formula 1 including secondary particles obtained by agglomerating at least one primary particle, and a metal oxide particles having a nano-sized average diameter (D50) and disposed inside the secondary particles. Lia[NixCoyMnz]tM1-tO2-pXp.

Abstract: An electronic device is disclosed. The electronic device supporting a low power wide area network (LPWAN) includes a communication circuit to make communication with a base station, a processor electrically connected with the communication circuit, and a memory electrically connected with the processor. The memory may include instructions that, when executed, cause the processor to establish a radio link with the base station by using the communication circuit, to transmit, to the base station, a first message requesting a random access by using the communication circuit, to receive a second message replying to the first message from the base station by using the communication circuit, when a timer is running for uplink transmission timing, and to update an existing timing advance value for the uplink transmission timing, based on a timing advance value included in the second message.

Abstract: The present invention relates to an all-solid-state battery including: a battery supporting member including an oxide-based solid electrolyte of a garnet structure; a positive electrode disposed on a first surface of the battery supporting member; and a negative electrode disposed on a second surface of the battery supporting member, wherein the positive electrode includes: a positive active material layer in contact with the first surface of the battery supporting member and including a positive active material represented by a predetermined chemical formula, and an ion conductor; and a positive current collector disposed on the positive active material layer, a manufacturing method thereof, a secondary battery including the same, and a monolithic battery module including the same.

Abstract: The present disclosure relates to a positive active material for a lithium rechargeable battery, a manufacturing method thereof, and a lithium rechargeable battery including the positive active material, and it provides a positive active material which is a lithium composite metal oxide including nickel, cobalt, and manganese, and either has orientation in a direction of [001] with respect to an ND axis that is equal to or greater than 29% or has orientation in a direction of [120]+[210] with respect to an RD axis that is equal to or greater than 82% in the case of an EBSD analysis with a misorientation angle (?g) that is equal to or less than 30 degrees.

Abstract: The present disclosure relates to a positive active material for a lithium rechargeable battery and a lithium rechargeable battery including the same, which include a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, and a content of the first compound is 65 wt % or more based of the positive active material of 100 wt %. Lia1Nib1Coc1Mnd1M1e1M2f1O2-f1[??Chemical Formula 1] Lia2Nib2COc2Mnd2M3e2M4f2O2-f2[??Chemical Formula 2] Chemical Composition 1 and 2 of each composition and molar ratio is as defined in the specification. Each composition and molar ratio of Chemical Formula 1 and 2 is as defined in the specification.

Abstract: A semiconductor memory apparatus includes a memory cell unit and an internal voltage stabilization apparatus. The memory cell unit includes a row decoder, a column decoder, and a memory cell array. The internal voltage stabilization apparatus includes an operation termination determination unit configured to determine whether an operation of the semiconductor memory apparatus is terminated on the basis of an external input voltage and output an operation termination command, a termination voltage generation unit configured to generate a termination voltage having a preset voltage value on the basis of a determination result of operation termination by the operation termination determination unit, and a switch unit. The switch unit includes a plurality of switches that are turned in response to the operation termination command, and supplies the termination voltage, input from the termination voltage generation unit, to a plurality of internal nodes of the memory cell array.

Abstract: An electronic device that performs a random access procedure based on mobility is provided. The electronic device includes a random access procedure to the same base station while increasing the coverage level when the mobility is low, and may abort the random access procedure when a specified number of preamble transmissions or more is performed and the mobility is high, so that the random access of the electronic device is prevented from being delayed.

Abstract: A semiconductor memory apparatus includes a memory cell unit and an internal voltage stabilization apparatus. The memory cell unit includes a row decoder, a column decoder, and a memory cell array. The internal voltage stabilization apparatus includes an operation termination determination unit configured to determine whether an operation of the semiconductor memory apparatus is terminated on the basis of an external input voltage and output an operation termination command, a termination voltage generation unit configured to generate a termination voltage having a preset voltage value on the basis of a determination result of operation termination by the operation termination determination unit, and a switch unit. The switch unit includes a plurality of switches that are turned in response to the operation termination command, and supplies the termination voltage, input from the termination voltage generation unit, to a plurality of internal nodes of the memory cell array.

Abstract: A positive electrode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium transition metal composite oxide and doping metals doped in the lithium-transition metal composite oxide, wherein the doping metals includes at least two kinds and the average oxidation number of the doping metals is greater than 3.5.

Abstract: A positive active material manufacturing method according to an exemplary embodiment of the present invention includes: a step of preparing a lithium-containing compound; a step of manufacturing a coating liquid including at least one coating element; a step of mixing the lithium-containing compound and the coating liquid to form a coating mixture of a clay or slurry state; and a step of agitating the coating mixture. Further, a manufacturing apparatus of a positive active material according to an exemplary embodiment includes a rotation container, a cover, a nozzle, and an agitation wing.

Abstract: This proposes a minimum core radius for nickel-based metal hydroxide particles having a core-shell gradient (CSG) in which a concentration of nickel in a core portion is constantly maintained and a concentration of nickel in a shell portion is sharply decreased.

Abstract: The present invention has been made in an effort to provide a preparation method of a positive electrode active material having improved structural stability and electrochemical characteristics by simultaneously coating Mn and B on the surface of a nickel-based lithium metal oxide, and to provide a lithium rechargeable battery including a positive electrode having a positive electrode active material that prepared by such a method.

Abstract: A concentration gradient mode capable of simultaneously achieving a high capacity and a structural stabilization with respect to the nickel-based lithium metal oxide and a doping element capable of appropriately controlling the shape and size of the primary particles are presented.