Abstract: Disclosed is an electrolyte for lithium secondary batteries including a lithium salt and a non-aqueous solvent, in which a silane based material is included in an amount of 0.1 to 20 wt % based on the total weight of the electrolyte, and a lithium secondary battery including the same.

Abstract: Provided are a method of preparing an electrode assembly, in which both sides of a single current collector are coated to form an anode and a cathode, and the current collector is then bent into a vertical sectional zigzag shape and integrated in a state of disposing a separator at interfaces between facing electrode patterns, an electrode assembly prepared by the above method, and a secondary battery comprising the electrode assembly.

Abstract: In accordance with one aspect of the present invention, provided is an apparatus for managing a battery system having a plurality of battery cells connected in series, the apparatus comprising a performance measurement section for measuring a performance of each of the battery cells; a cell switching section for turning on or off a connection of each battery cell to other battery cells; and a controlling section for comparing the performance of each battery cell measured by the performance measurement section with a reference performance and, in the presence of the battery cell(s) having measured performance lower than the reference performance, controlling the cell switching section to interrupt the connection of the relevant battery cell(s) to other battery cells.

Abstract: Disclosed are an electrolyte for lithium secondary batteries including a lithium salt and a non-aqueous solvent, in which the non-aqueous solvent includes an ether based solvent and a glyme based solvent and a ratio of the ether based solvent to the glyme based solvent is 20:80 to 60:40 based on the total volume of the non-aqueous solvent, and a secondary battery including the same.

Abstract: Disclosed is a lithium secondary battery including (i) a cathode active material including a lithium metal phosphate according to Formula 1 below, (ii) an anode active material including amorphous carbon, and (iii) an electrolyte for lithium secondary batteries including a lithium salt and an ether-based solvent, Lii+aM(PO4?b)Xb ??(1) wherein M is at least one selected from the group consisting of Group II to XII metals, X is at least one selected from F, S, and N, ?0.5?a?+0.5, and 0?b?0.1.

Abstract: Disclosed are an electrolyte for lithium secondary batteries including a lithium salt and a non-aqueous solvent, in which the electrolyte includes a sulfanyl based solvent, and a lithium secondary battery including the same.

Abstract: Disclosed is a lithium secondary battery including: (i) a cathode active material including a lithium metal phosphate according to Formula 1 below; (ii) an anode active material including amorphous carbon; and (iii) an electrolyte for lithium secondary batteries including a lithium salt and an ether based solvent, wherein propylene carbonate (PC) is included in an amount of 1 wt % to 60 wt % in the electrolyte for lithium secondary batteries, based on the total weight of the electrolyte, Li1+aM(PO4-b)Xb??(1) wherein M is at least one selected from metals of Groups II to XII; X is at least one selected from F, S and N, ?0.5?a?+0.5, and 0?b?0.1.

Abstract: Disclosed is a lithium secondary battery including (i) a cathode active material including a lithium metal phosphate according to Formula 1 below; and (ii) an anode active material including amorphous carbon, Li1+aM(PO4?b)Xb??(1) wherein M is at least one selected from metals of Groups II to XII, X is at least one selected from F, S and N, ?0.5?a?+0.5, and 0?b?0.1.

Abstract: Disclosed is an electrolyte for lithium secondary batteries including a lithium salt and a non-aqueous solvent, in which a silane based material is included in an amount of 0.1 to 20 wt % based on the total weight of the electrolyte, and a lithium secondary battery including the same.

Abstract: Disclosed is an electrolyte for lithium secondary batteries including a lithium salt and a non-aqueous solvent, in which the lithium salt includes at least one selected from the group consisting of lithium oxalyldifluoroborate (LiODFB) and lithium hexafluorophosphate (LiPF6), and the non-aqueous solvent includes an ether based solvent.

Abstract: Disclosed are an electrolyte for lithium secondary batteries including a lithium salt and a non-aqueous solvent, in which the lithium salt includes lithium bis(fluorosulfonyl)imide (LiFSI), or lithium bis(fluorosulfonyl)imide (LiFSI) and lithium hexafluorophosphate (LiPF6), and the non-aqueous solvent includes an ether based solvent.

Abstract: Disclosed are an electrolyte for lithium secondary batteries including 10 wt % to 90 wt % of an ester based solvent and 10 wt % to 90 wt % of a carbonate based solvent with respect to the total weight of a non-aqueous solvent, and a lithium secondary battery including the same.

Abstract: Provided are a method of preparing an electrode assembly, in which both sides of a single current collector are coated to form an anode and a cathode, and the current collector is then bent into a vertical sectional zigzag shape and integrated in a state of disposing a separator at interfaces between facing electrode patterns, an electrode assembly prepared by the above method, and a secondary battery comprising the electrode assembly.

Abstract: In accordance with one aspect of the present invention, provided is an apparatus for managing a battery system having a plurality of battery cells connected in series, the apparatus comprising a performance measurement section for measuring a performance of each of the battery cells; a cell switching section for turning on or off a connection of each battery cell to other battery cells; and a controlling section for comparing the performance of each battery cell measured by the performance measurement section with a reference performance and, in the presence of the battery cell(s) having measured performance lower than the reference performance, controlling the cell switching section to interrupt the connection of the relevant battery cell(s) to other battery cells.

Abstract: Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithium secondary battery comprising the electrolyte. The chelating agent, which is contained in the electrolyte for lithium secondary batteries, can suppress a side reaction in which transition metal ions are reduced and deposited as transition metals on the anode. Also, the chelating agent can suppress internal short-circuits in the battery and the resulting voltage drop of the battery and a reduction in the safety and performance of the battery, which can occur when transition metals are deposited on the anode.

Abstract: Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithium secondary battery comprising the electrolyte. The chelating agent, which is contained in the electrolyte for lithium secondary batteries, can suppress a side reaction in which transition metal ions are reduced and deposited as transition metals on the anode. Also, the chelating agent can suppress internal short-circuits in the battery and the resulting voltage drop of the battery and a reduction in the safety and performance of the battery, which can occur when transition metals are deposited on the anode.

Abstract: Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithium secondary battery comprising the electrolyte. The chelating agent, which is contained in the electrolyte for lithium secondary batteries, can suppress a side reaction in which transition metal ions are reduced and deposited as transition metals on the anode. Also, the chelating agent can suppress internal short-circuits in the battery and the resulting voltage drop of the battery and a reduction in the safety and performance of the battery, which can occur when transition metals are deposited on the anode.