Abstract: Provided is a non-aqueous lithium secondary battery comprising an electrode assembly composed of a cathode, an anode, and a separator interposed between the cathode and anode, wherein the cathode and anode have an electrode material containing an active material applied on a current collector, a non-aqueous electrolyte containing a lithium salt, hydrophobic inactive-particles (also, referred to as “hydrophobic particles”) included in the electrode material, and a battery case sealing all the constituent components. Upon adding hydrophobic inactive-particles to the electrode material in a non-aqueous lithium secondary battery, absorption and inflow of water into the electrode material during the battery production is effectively inhibited such as to prevent side reactions caused by water inside the battery, thereby exhibiting improvement in the high-temperature storage characteristics of the battery.

Abstract: Provided is a high-power, non-aqueous electrolyte lithium secondary battery having a long lifespan and superior safety at both room temperature and high temperatures, even after repeated high-current charging and discharging. The battery comprises a mixture of a manganese spinel oxide and a lithium/nickel/cobalt/manganese composite oxide, as a cathode active material.

Abstract: Disclosed herein is a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, the electrode tabs are electrically connected to an electrode lead, and the pluralities of electrode tabs are joined to the top and the bottom of the electrode lead at an electrode lead-electrode tabs joint portion such that the resistance difference between electrodes at the electrode lead-electrode tabs joint portion is minimized. Also disclosed is an electrochemical cell including the electrode assembly.

Abstract: Disclosed herein is a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, electrode leads are located at one-side ends of the stacked electrode tabs such that the electrode leads are electrically connected to the electrode tabs, and the electrode leads, joined to the electrode tabs, have rounded ends. An electrochemical cell including the electrode assembly is also disclosed.

Abstract: Disclosed herein is a lithium secondary battery having improved life characteristics by removal of metal ion impurities incorporated during an assembly process of the battery via a cation exchange process, thereby preventing electrodeposition of the metal ions on an anode, through the addition of a cation exchange material, containing cations selected from the group consisting of lithium, sodium, ammonium and any combination thereof, to an electrode and/or a surface of a separator.

Abstract: Provided is an electrode material, which contains an electrode active material, comprising a clay mineral in an amount of the range of 5% by weight or less based on the total weight of the electrode material for increasing the mechanical strength of the electrode material and improving the impregnation ability of an electrolyte.

Abstract: Provided is an anode mix for a secondary battery comprising an anode active material, a conductive material and a binder, wherein the anode mix contains 0.01 to 1.0% by weight of alumina having an average particle diameter of less than 1000 nm, based on the total weight of the mix, and a lithium secondary battery comprising the same. Therefore, the present invention can achieve increases in anode active material-conductive material adhesion and anode active material-current collector adhesion which are exerted by a binder, and ultimately can improve lifespan characteristics or cycle characteristics of the battery.

Abstract: Disclosed herein is a lithium secondary battery including a phosphate compound, wherein metal ion impurities incorporated during a fabrication process of the battery are precipitated to thereby prevent electrodeposition of the metal ions on an anode, through the addition of one or more phosphates of Formula I to an electrode, an electrolyte or the surface of a separator: AxH(3?x)PO4 ??(I) wherein, A is Li, Na or NH4; and O<x?3.

Abstract: Disclosed herein is an electrochemical cell constructed in a structure in which a plurality of full cells or bicells, as unit cells, are folded by a separation film formed in the shape of a long sheet, and separators of the unit cells are secured to the separation film by thermal welding. The electrochemical cell according to the present invention has the effect of preventing the electrodes of the stacked electrodes from being separated from the separation film or from being twisted due to external impacts and vibrations, thereby restraining the electrochemical cell from generating heat or catching fire. Furthermore, the structural stability of the electrochemical cell is maintained even when the temperature of the electrochemical cell is increased, or the volume of the electrochemical cell is increased due to the generation of gas.

Abstract: Disclosed herein is a secondary battery constructed in a structure in which an electrode assembly having a cathode/separator/anode arrangement is mounted in a battery case made of a laminate sheet including a resin layer and a metal layer, electrode taps of the electrode assembly are coupled to corresponding electrode leads, and the electrode assembly is sealed in the battery case while electrode leads are exposed to the outside of the battery case, wherein a protective film is attached to coupling regions between the electrode taps and the electrode leads for sealing the coupling regions between the electrode taps and the electrode leads. The secondary battery according to the present invention is constructed in a structure in which the coupling regions are sealed by the protective film, unlike a conventional secondary battery constructed in a structure in which the coupling regions between the electrode taps and the electrode leads are exposed in the battery case.

Abstract: Disclosed herein are an electrode assembly including a plurality of unit cells folded by a continuous separation film wherein the unit cells are arranged on the separation film such that electrode taps of the unit cells face each other, the separation film has openings corresponding to the electrode taps of the unit cells, and the electrode assembly is manufactured by folding the unit cells in the longitudinal (lengthwise) direction of the separation film while the unit cells are disposed such that the electrode taps of the unit cells are inserted into the corresponding openings, and an electrochemical cell, such as a secondary battery, including the same. The electrode assembly according to the present invention is a hybrid type electrode assembly solving the problems of the jelly-roll type electrode assembly and the stacking type electrode assembly.