Abstract: Provided are a positive electrode active material for improving an output and a lithium secondary battery including the same. Particularly, graphite and conductive carbon which have shapes and sizes different from each other, may be simultaneously coated on a mixed positive electrode material of a 3-component system lithium-containing metal oxide having a layered structure and expressed as following Chemical Formula 1 and LiFePO4 having an olivine structure as an conductive material to improve high resistance occurrence and conductivity reduction phenomenon of a 3-component system lithium metal oxide due to a difference between particle sizes and surface areas of the 3-component system lithium-containing metal oxide and LiFePO4 olivine. Li1+aNixCoyMn1-x-yO2, 0?a<0.5, 0<x<1, 0<y<0.

Abstract: Disclosed is a cathode active material represented by the following Formula 1, the cathode active material being in the form of a solid solution or a composite, and a secondary battery including the cathode active material. wLi2MO3*xLiM?O2*yLiM?2O4*zLi3PO4??(1) wherein 0<w<1, 0<x<1, 0<y<0.3, 0<z<0.1 and w+x+y+z=1 are satisfied, M is at least one element selected from first or second period transition metals having a mean oxidation number of +4, M? is at least one element selected from first or second period transition metals having a mean oxidation number of +3, and M? is at least one element selected from first to fourth period transition metals having a combination of mean oxidation numbers of +3 and +4.

Abstract: Provided is a lithium secondary battery having improved discharge characteristics in a range of high-rate discharge while minimizing a dead volume and at the same time, having increased cell capacity via increased electrode density and electrode loading amounts, by inclusion of two or more active materials having different redox levels so as to exert superior discharge characteristics in the range of high-rate discharge via sequential action of cathode active materials in a discharge process, and preferably having different particle diameters.

Abstract: Provided is a cathode active material which is lithium transition metal oxide having an ?-NaFeO2 layered crystal structure, wherein the transition metal is a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is more than +3, and lithium transition metal oxide satisfies the Equation m(Ni)?m(Mn) (in which m (Ni) and m (Mn) represent an molar number of nickel and manganese, respectively). The lithium transition metal oxide has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.

Abstract: Disclosed is a lithium secondary battery, which is low in capacity loss after overdischarge, having excellent capacity restorability after overdischarge and shows an effect of preventing a battery from swelling at a high temperature.

Abstract: Disclosed are a transition metal precursor for preparation of a lithium transition metal oxide, in which a ratio of tap density of the precursor to average particle diameter D50 of the precursor satisfies the condition represented by Equation 1 below, and a lithium transition metal oxide prepared using the same.

Abstract: Disclosed herein is an additive for improvement in safety of an electrochemical device, including an inner core and an outer coating layer, wherein the inner core is formed using a volume-expandable material fused at more than a predetermined temperature while the outer coating layer is formed using a conductive material with higher conductivity than that of the inner core and covers an outer face of the inner core. The disclosed additive rapidly increases resistance of the electrochemical device before ignition/explosion of the device caused by temperature rise, thereby effectively preventing ignition/explosion of the electrochemical device without deterioration in performance of the electrochemical device.

Abstract: Disclosed herein is a cathode active material based on lithium nickel-manganese-cobalt oxide represented by Formula 1, wherein an ion-conductive solid compound and conductive carbon are applied to a surface of the lithium nickel-manganese-cobalt oxide. A lithium secondary battery having the disclosed cathode active material has improved rate properties and high temperature stability, in turn embodying excellent cell performance.

Abstract: A battery module includes a first battery cell having a first housing and first and second electrical terminals. The first housing has first, second, third and fourth ends. The first and second electrical terminals extend outwardly from the third and fourth ends, respectively. A distance from the second end of the first housing to a second edge of the first electrical terminal is greater than a distance from the first end of the first housing to a first edge of the first electrical terminal. A distance from the second end of the first housing to a second edge of the second electrical terminal is greater than a distance from the first end of the first housing to a first edge of the second electrical terminal. The battery module further includes a cooling fin disposed adjacent to the first battery cell, and a cooling plate coupled to the cooling fin.

Abstract: Disclosed is a cathode mix for secondary batteries, comprising lithium iron phosphate, coated with carbon (C), having an olivine crystal structure that contains a compound represented by the following formula 1 as a cathode active material, wherein a mean particle diameter of primary particles in the cathode active material is 2 ?m or less, and the cathode mix contains a hydrophilic conductive material as a conductive material. (1?x)Li1+aFe1?yMy(PO4?z)Az.xC??(1) wherein M is at least one selected from Al, Mg, Ni, Co, Mn, Ti, Ga, Cu, V, Nb, Zr, Ce, In, Zn and Y, A is at least one selected from F, S and N, and 0<x?0.2, ?0.5?a?+0.5, 0?y?0.5, 0?z?0.1.

Abstract: Disclosed is a method of manufacturing a secondary battery, built in a battery case, having an electrode assembly impregnated with an electrolyte solution, the method including: (a) injecting an electrolyte solution as a target into a chamber equipped with a vibrating probe; (b) impregnating by soaking an electrode assembly, which has a separator interposed between a cathode and an anode, in an electrolyte solution contained in the chamber; (c) applying vibration at a frequency of 20 to 100 kHz of to the electrolyte solution with the vibrating probe; and (d) moving the electrode assembly with the electrolyte solution into a battery case, whereby interfacial wetting of the electrode assembly and the electrolyte solution is improved. A secondary battery manufactured according to the method may have improved electrolyte solution impregnation properties, ionic conductivity, electronic conductivity and the like and, as such, may have improved electrochemical performance.

Abstract: The present invention discloses an apparatus and method for varying a usable band range of a battery. The apparatus for varying a usable band range of a battery according to the present invention comprises a sensor for measuring and outputting an electrical characteristic value of the battery; and a controller for calculating the amount of charged or discharged energy of the battery from the electrical characteristic value and varying a usable band range of the battery that is charged and discharged, to maintain the pre-established amount of usable energy depending on the degradation degree of the battery. In accordance with the present invention, a usable band range of a battery can be established depending on the degradation degree of the battery, thereby improving the life time thereof.

Abstract: Disclosed is an anode for secondary batteries comprising a combination of an anode active material having a relatively low charge/discharge voltage and a relatively low hardness (A) and an anode active material having a relatively high charge/discharge voltage and a relatively high hardness (B), wherein the anode active material (A) is surface-coated with carbon having a high hardness or a composite thereof, and a particle size of the anode active material (B) is smaller than a size of a space formed by the anode active materials (A) arranged in a four-coordination. The anode provides an electrode that prevents lithium precipitation caused by overvoltage, improves ionic conductivity as well as electric conductivity and exhibits superior capacity.

Abstract: The present invention relates to a cable-type secondary battery comprising a polymer electrolyte having a first electrolyte layer comprising a mixture of a first polymer and a first organic electrolyte solution in a weight ratio of 50:50 and 80:20; and a second electrolyte layer formed on at least one surface of the first electrolyte layer and comprising a mixture of a second polymer and a second organic electrolyte solution in a weight ratio of 20:80 and 50:50. Since the multiple-layered polymer electrode film of the present invention exhibits good characteristics in terms of both mechanical property and ionic conductivity, the cable-type secondary battery comprising the same according to the present invention has superior battery performances and flexibility, as well as good strength for withstanding external impact.

Abstract: A battery module having first and second battery cells is provided. The first battery cell has a housing and first and second electrical terminals. The housing extends longitudinally along a first axis and vertically along a second axis. The housing has first, second, third and fourth ends. The first and second ends extend parallel to the first axis. The third and fourth ends extend parallel to the second axis. The first electrical terminal extends from the third end in a direction parallel to the first axis, and has first and second edges extending parallel to the first axis. The first edge is disposed closer to the first end than the second edge of the first electrical terminal. A distance from the second end of the housing to the second edge of the first electrical terminal is greater than a distance from the first end of the housing to the first edge of the first electrical terminal.

Abstract: Disclosed is a cathode active material for secondary batteries, comprising at least one compound selected from the following Formula 1: xLi2MO3*yLiM?O2*zLi3PO4 (1) wherein M is at least one element selected from 1 period or 2 period metals having an oxidation number of +4; M? is at least one element selected from 1 period or 2 period metals having a mean oxidation number of +3; and 0.1?x?0.9, 0.1?y?0.9, 0<z?0.2 and x+y+z=1.

Abstract: A battery module having first and second battery cells is provided. The first battery cell has a housing and first and second electrical terminals. The housing extends longitudinally along a first axis and vertically along a second axis. The housing has first, second, third and fourth ends. The first and second ends extend parallel to the first axis. The third and fourth ends extend parallel to the second axis. The first electrical terminal extends from the third end in a direction parallel to the first axis, and has first and second edges extending parallel to the first axis. The first edge is disposed closer to the first end than the second edge of the first electrical terminal. A distance from the second end of the housing to the second edge of the first electrical terminal is greater than a distance from the first end of the housing to the first edge of the first electrical terminal.

Abstract: Disclosed is a method of manufacturing a secondary battery wherein an electrode assembly impregnated with an electrolytic solution is embedded in a battery case, wherein interfacial contact properties (i.e. wetting) of the electrode assembly and the electrolytic solution are improved through a process including: (a) impregnating an electrode assembly having a separator interposed between a cathode and an anode with an electrolytic solution; and (b) applying vibration having a frequency of 20 to 100 kHz to an electrolytic solution with which the electrode assembly is impregnated. A secondary battery manufactured according to the method may have improved ionic conductivity, electronic conductivity and the like and, as such, may have improved electrochemical performance.

Abstract: A battery module includes a first battery cell having a first housing and first and second electrical terminals. The first housing has first, second, third and fourth ends. The first and second electrical terminals extend outwardly from the third and fourth ends, respectively. A distance from the second end of the first housing to a second edge of the first electrical terminal is greater than a distance from the first end of the first housing to a first edge of the first electrical terminal A distance from the second end of the first housing to a second edge of the second electrical terminal is greater than a distance from the first end of the first housing to a first edge of the second electrical terminal. The battery module further includes a cooling fin disposed adjacent to the first battery cell, and a cooling plate coupled to the cooling fin.

Abstract: Disclosed herein is a cathode active material based on lithium nickel-manganese-cobalt oxide represented by Formula 1, wherein the lithium nickel-manganese-cobalt oxide has nickel content of at least 40% among overall transition metals and is coated with an ion-conductive solid compound at a surface thereof. A lithium secondary battery having the disclosed cathode active material has advantages of not deteriorating electrical conductivity while maintaining high temperature stability, so as to efficiently provide high charge capacity.