Abstract: A secondary battery includes a case that accommodates an electrode assembly; a cap plate sealing an opening of the case and including a first exhaust hole, and having a first polarity; an insulating member disposed on a lower portion of the cap plate and including a second exhaust hole with a larger diameter than the first exhaust hole, and positioned to correspond to the first exhaust hole; a current collecting member disposed on a lower portion of the insulating member and electrically connected to the electrode assembly, and having a second polarity different from the first polarity; a guide member disposed in a lower portion of the second exhaust hole and electrically connected to the current collecting member; and a short-circuit member including a conductive material and disposed in the guide member to move to come into contact with the cap plate in response to pressure generated within the case.

Abstract: A method for generating and validating customized investment portfolios according to an example of the present invention includes (a) a step of receiving an investment idea from a user terminal; (b) a step of selecting an investment product corresponding to the investment idea, and selecting an asset investment ratio distribution method for each investment product to generate the investment portfolio; (c) a step of validating risk and profitability of the investment portfolio in accordance with a past period and predetermined criteria, and providing generation results and validation results of the investment portfolio to the user terminal; and (d) a step of setting the investment portfolio to be exposed to another user terminal connected to the server in accordance with a request of the user terminal.

Abstract: A mobile communication terminal including a display unit configured to display information, and a controller configured to allocate at least first and second specified display regions on the display unit and to display at least first and second menu items in a combined form with respective multimedia images on the at least first and second specified display regions, respectively.

Abstract: Provided is a cathode material for a lithium secondary battery, comprising a heat-treated mixture of an oxide powder (a) represented by Formula I and an oxide powder (b) represented by Formula II, wherein a mixing ratio of the oxide powder (a):oxide powder (b) is in a range of 30:70 to 90:10, the oxide powder (a) is monolithic particles having a D50 of more than 10 ?m, and the oxide powder (b) is agglomerated particles having a D50 of less than 10 ?m, and heat treatment is carried out at a temperature of 400° C. or higher. LiCoO2??(I) LizMO2??(II) wherein 0.95<z<1.1; M=Ni1-x-yMnxCoy, 0<y<0.5, and a ratio of Mn to Ni (x/(1-x-y)) is in a range of 0.4 to 1.1.

Abstract: Provided is a cathode active material containing a Ni-based lithium mixed transition metal oxide. More specifically, the cathode active material comprises the lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 wherein M, x and y are as defined in the specification, which is prepared by a solid-state reaction of Li2CO3 with a mixed transition metal precursor under an oxygen-deficient atmosphere, and has a Li2CO3 content of less than 0.07% by weight of the cathode active material as determined by pH titration. The cathode active material in accordance with the present invention and substantially free of water-soluble bases such as lithium carbonates and lithium sulfates and therefore has excellent high-temperature and storage stabilities and a stable crystal structure.

Abstract: Disclosed are a safety element for a battery, which is provided with material having a Metal-Insulator Transition (MIT) characteristic where resistance abruptly drops at or above a certain temperature, and a battery with such a safety element. This battery with an MIT safety element is turned into a stable discharged state when it is exposed to an elevated temperature or a battery temperature rises due to external impact, so that it can ensure its safety.

Abstract: The present invention provides: (i) a nonaqueous electrolyte for batteries, which is characterized by containing halogen; (ii) a nonaqueous electrolyte for batteries, which is characterized by containing pyrrol or its derivative and halogen; and (iii) a lithium secondary battery which is characterized by including the nonaqueous electrolyte (i) or (ii). The inventive lithium secondary battery has improvements in charge/discharge and cycle life characteristics at ambient and high temperatures, and/or storage characteristics and safety at high temperature.