Abstract: An aspect of the present invention is to provide a rechargeable battery that implements a high output of an electrode assembly by reducing electrical resistance at a connection portion of a uncoated portion and a lead tab. A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly wound by arranging a separator between electrodes; a lead tab connected to the electrode; and a case which accommodates the electrode assembly and of which the lead tab is drawn to the outside, and the lead tab includes a first tab formed with a first width and a first thickness and connected to an uncoated portion of the electrode, and a second tab formed with a second width equal to or less than the first width and a second thickness equal to or more than the first thickness, and connected to the first tab.

Abstract: Various embodiments of the present invention relate to a secondary battery, and the objective of the present invention is to provide a secondary battery, which has drop-impact resistance, by providing an electrode assembly having a relatively thick inner circumferential and a relatively thin outer circumferential tab. To this end, disclosed is a secondary battery, which comprises an electrode assembly comprising: an anode plate having an inner circumferential tab formed at a wound front end thereof; a separator covering the anode plate; and a cathode plate having an outer circumferential tab formed at a wound distal end thereof.

Abstract: A rechargeable battery includes: an electrode assembly including a separator between a first electrode and a second electrode each having uncoated regions and coated regions, and in which the separator, the first electrode, and the second electrode are spirally wound; a case that houses the electrode assembly; and a first electrode tab and a second electrode tab to be drawn outside of the case that are respectively coupled to the uncoated regions of the first electrode and the second electrode while maintaining a tab gap between the first electrode tab and the second electrode tab, where the first electrode tab is coupled to a gap uncoated region between the coated regions of the first electrode, and where in a thickness direction of the electrode assembly, in an area facing the first electrode tab, an internal side end uncoated region of the second electrode is located.

Abstract: A rechargeable battery includes a wound electrode assembly including a separator between a first electrode and a second electrode, the first and second electrodes each including uncoated regions and coated regions; a case accommodating the electrode assembly; and a first electrode terminal and a second electrode terminal respectively coupled to the first and second electrodes and extending from the case, an uncoated region of the first electrode including inner and outer uncoated regions of a terminal end portion located at an outermost side of the electrode assembly, and the second electrode including an outer uncoated region of a terminal end portion facing the inner uncoated region of the first electrode and an additional inner coated region at an opposite side of the outer uncoated region.

Abstract: A rechargeable lithium battery includes a positive active material for intercalating and deintercalating lithium ions; a negative electrode including a negative active material for intercalating and deintercalating lithium ions; and a polymer electrolyte including a polymer, a non-aqueous organic solvent and a lithium salt. The rechargeable lithium battery has a battery capacity per unit area of the positive electrode from about 3.3 mAh/cm2 to about 2.8 mAh/cm2. The polymer includes a first monomer represented by the following Chemical Formula 1 and a second monomer represented by at least one of the following Chemical Formulae 2 to 7 at a weight ratio of about 85:15 to about 50:50 of the first monomer to the second monomer. In the above Chemical Formulae 1 to 7, each compound is as described in the detailed description.

Abstract: A rechargeable battery includes: an electrode assembly including a separator between a first electrode and a second electrode each having uncoated regions and coated regions, and in which the separator, the first electrode, and the second electrode are spirally wound; a case that houses the electrode assembly; and a first electrode tab and a second electrode tab to be drawn outside of the case that are respectively coupled to the uncoated regions of the first electrode and the second electrode while maintaining a tab gap between the first electrode tab and the second electrode tab, where the first electrode tab is coupled to a gap uncoated region between the coated regions of the first electrode, and where in a thickness direction of the electrode assembly, in an area facing the first electrode tab, an internal side end uncoated region of the second electrode is located.

Abstract: A rechargeable battery, including an electrode assembly including wound electrodes with a separator therebetween; a pouch housing the electrode assembly; and lead tabs connected to the electrodes and drawn out of the pouch, the lead tabs including an inner tab having a first thickness, connected to the electrode, and drawn out of the electrode assembly.

Abstract: A rechargeable battery includes a wound electrode assembly comprising a separator between a first electrode and a second electrode, wherein the first and second electrodes each include uncoated regions and coated regions; a case accommodating the electrode assembly; and a first electrode terminal and a second electrode terminal respectively coupled to the first and second electrodes and extending from the case, wherein an uncoated region of the first electrode includes inner and outer uncoated regions of a terminal end portion located at an outermost side of the electrode assembly, and wherein the second electrode includes an outer uncoated region of a terminal end portion facing the inner uncoated region of the first electrode and an additional inner coated region at an opposite side of the outer uncoated region.

Abstract: An electrolyte for a rechargeable lithium battery and a rechargeable lithium battery including the same, and the electrolyte includes a lithium salt, a non-aqueous organic solvent, and an additive, wherein the additive includes a polyester polyol-based monomer represented by the following Chemical Formula 1; C1 to C10 alkyl acrylate; and a phosphate-based compound selected from triallyl phosphate represented by the following Chemical Formula 10, triacryl phosphate represented by the following Chemical Formula 11, or a combination thereof: In Chemical Formula 1, each substituent is the same as described in the detailed description.

Abstract: An electrolyte solution for a rechargeable lithium battery, including a lithium salt, a non-aqueous organic solvent, and an additive including fluoroethylene carbonate, a vinyl-containing carbonate, a substituted or unsubstituted C2 to C10 cyclic sulfate, and a nitrile-based compound represented by the following Chemical Formula 1: wherein, in Chemical Formula 1, R may be a substituted or unsubstituted C1 to C20 alkylene group.

Abstract: A rechargeable lithium battery includes a positive electrode including a positive active material being capable of intercalating or deintercalating lithium; a negative electrode including a carbon-based negative active material and a water-soluble binder; and a polymer electrolyte including a polymer, a non-aqueous organic solvent and a lithium salt, wherein the polymer comprises a polymerization product of a first monomer represented by Chemical Formula 1 with a second monomer which is one or more of monomers represented by Chemical Formulae 2 to 7: A-U—B??Chemical Formula 1 CH2?CL1-C(?O)—O-M??Chemical Formula 2 CH2?CL1-O-M??Chemical Formula 3 CH2?CL1-O—C(?O)-M??Chemical Formula 4 CH2?CH—CH2—O-M??Chemical Formula 5 CH2?CH—S(?O)2-M??Chemical Formula 6 CH2?CL1-C(?O)—O—CH2CH2—NH—C(?O)—O-M??Chemical Formula 7 wherein, definition of each substituent group is as described in detailed description.

Abstract: A rechargeable lithium battery including a negative electrode, the negative electrode including a silicon-based material and graphite; a positive electrode; and an electrolyte, wherein the negative electrode includes silicon in an amount of greater than 0 wt % and less than or equal to about 2 wt %, based on a total weight of the silicon-based material and the graphite, and the rechargeable lithium battery has a discharge cut-off voltage of greater than or equal to about 3.1 V.

Abstract: An electrolyte for a rechargeable lithium battery and a rechargeable lithium battery including the same, and the electrolyte includes a lithium salt, a non-aqueous organic solvent, and an additive, wherein the additive includes a polyester polyol-based monomer represented by the following Chemical Formula 1; C1 to C10 alkyl acrylate; and a phosphate-based compound selected from triallyl phosphate represented by the following Chemical Formula 10, triacryl phosphate represented by the following Chemical Formula 11, or a combination thereof: In Chemical Formula 1, each substituent is the same as described in the detailed description.

Abstract: Disclosed is a non-aqueous rechargeable lithium battery that includes a positive electrode including a positive active material being capable of intercalating and deintercalating lithium; a negative electrode including a negative active material; a polymer electrolyte including a gel polymer, a non-aqueous organic solvent, and a lithium salt; and a separator having compression strength of about 0.15 gf/cm2 to about 0.3 gf/cm2 per 1 ?m thickness.

Abstract: A rechargeable battery including an electrode assembly including a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode; a case housing the electrode assembly; a heat dissipating member including a heat collecting portion inserted in the electrode assembly and a heat dissipating portion protruding outside of the case; and a sealing member between the heat dissipating member and the case, the sealing member including a first polymer layer and a second polymer layer having a melting point that is lower than a melting point of the first polymer layer.

Abstract: A rechargeable battery including an electrode assembly including a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode; a case housing the electrode assembly; a heat dissipating member including a heat collecting portion inserted in the electrode assembly and a heat dissipating portion protruding outside of the case; and a sealing member between the heat dissipating member and the case, the sealing member including a first polymer layer and a second polymer layer having a melting point that is lower than a melting point of the first polymer layer.

Abstract: An electrolyte solution for a rechargeable lithium battery, including a lithium salt, a non-aqueous organic solvent, and an additive including fluoroethylene carbonate, a vinyl-containing carbonate, a substituted or unsubstituted C2 to C10 cyclic sulfate, and a nitrile-based compound represented by the following Chemical Formula 1: wherein, in Chemical Formula 1, R may be a substituted or unsubstituted C1 to C20 alkylene group.

Abstract: A rechargeable lithium battery includes a positive active material for intercalating and deintercalating lithium ions; a negative electrode including a negative active material for intercalating and deintercalating lithium ions; and a polymer electrolyte including a polymer, a non-aqueous organic solvent and a lithium salt. The rechargeable lithium battery has a battery capacity per unit area of the positive electrode from about 3.3 mAh/cm2 to about 2.8 mAh/cm2. The polymer includes a first monomer represented by the following Chemical Formula 1 and a second monomer represented by at least one of the following Chemical Formulae 2 to 7 at a weight ratio of about 85:15 to about 50:50 of the first monomer to the second monomer. In the above Chemical Formulae 1 to 7, each compound is as described in the detailed description.

Abstract: A rechargeable lithium battery includes a positive electrode including a positive active material being capable of intercalating or deintercalating lithium; a negative electrode including a carbon-based negative active material and a water-soluble binder; and a polymer electrolyte including a polymer, a non-aqueous organic solvent and a lithium salt, wherein the polymer comprises a polymerization product of a first monomer represented by Chemical Formula 1 with a second monomer which is one or more of monomers represented by Chemical Formulae 2 to 7: A-U—B ??Chemical Formula 1 CH2?CL1-C(?O)-O-M ??Chemical Formula 2 CH2?CL1-O-M ??Chemical Formula 3 CH2?CL1-O—C(?O)-M ??Chemical Formula 4 CH2?CH—CH2-O-M ??Chemical Formula 5 CH2?CH—S(?O)2-M ??Chemical Formula 6 CH2?CL1-C(?O)—O—CH2CH2—NH—C(?O)—O-M ??Chemical Formula 7 wherein, definition of each substituent group is as described in detailed description.