The present invention comprises: a pre-aging step for aging, at room temperature, a secondary battery comprising a cathode including a cathode active material, an anode including an anode active material, a separator interposed between the cathode and the anode, and an electrolyte (S100); a first charging step for primarily charging the pre-aged secondary battery to an SOC of the secondary battery of 60% or higher (S200); a high-temperature aging step for aging the primarily charged secondary battery at a high temperature (S300); and a room-temperature aging step for aging the high-temperature aged secondary battery at room temperature (S400), wherein the room-temperature aging step comprises a resetting process for charging the secondary battery to the same SOC as in the first charging step.

An anodic member, an electrochemical device having an anodic member, and a method for manufacturing an anodic member for a lithium-ion battery. The method uses nanoparticles of an electrically insulating material that conducts lithium ions, is stable in contact with metallic lithium, does not insert lithium at potentials of between 0 V and 4.3 V with respect to the potential of the lithium, and has a relatively low melting point.

The purpose of the present invention is to provide a lithium secondary battery having a high energy density and an excellent cycle characteristic. The present invention relates to a lithium secondary battery having a positive electrode and a negative electrode not having a negative electrode active material, wherein at least a part of a surface of the negative electrode facing the positive electrode is coated with a compound containing an aromatic ring to which two or more elements selected from the group consisting of N, S, and O are each independently bonded.

Provided is a lithium secondary battery comprising a cathode, an anode, and an electrolyte or separator-electrolyte assembly disposed between the cathode and the anode, wherein the anode comprises: (a) An anode current collector, initially having no lithium or lithium alloy as an anode active material when the battery is made and prior to a charge or discharge operation; and (b) a thin layer of a high-elasticity polymer in ionic contact with the electrolyte and having a recoverable tensile strain from 2% to 700%, a lithium ion conductivity no less than 10.sup.−8 S/cm, and a thickness from 0.5 nm to 100 μm. Preferably, the high-elasticity polymer contains a cross-linked network of polymer chains having an ether linkage, nitrile-derived linkage, benzo peroxide-derived linkage, ethylene oxide linkage, propylene oxide linkage, vinyl alcohol linkage, cyano-resin linkage, triacrylate monomer-derived linkage, tetraacrylate monomer-derived linkage, or a combination thereof in the cross-linked network of polymer chains.

A device for charging and discharging a battery cell capable of suppressing a swelling phenomenon of a terrace portion of a battery cell during a formation process of the battery cell includes first and second plates configured to receive a battery cell therebetween and to press two surfaces of the battery cell; first and second grippers connected to the first and second plates, respectively, the first and second grippers protrude to face each other and configured to contact a lead region of the battery cell; and first and second pressing pads positioned inward of the first and second grippers, the first and second pressing pads being configured to contact a terrace region of the battery cell. A method of charging and discharging a battery cell using the same is also provided.

Disclosed are a method for manufacturing a secondary battery and an auxiliary case configured for use during manufacturing of the secondary battery. A gas generated in the secondary battery may be discharged to prevent an electrode assembly and the secondary battery from increasing in thickness, and an electrolyte may be efficiently injected into the secondary battery. A method for manufacturing a secondary battery includes: an accommodation step of accommodating an electrode assembly into a battery case; a connection step of connecting an auxiliary case to the battery case, the auxiliary case having an inner space therein; an injection step of injecting an electrolyte into the battery case and the auxiliary case; an electrolyte supply step of moving some of the electrolyte from the auxiliary case into the battery case; and a gas supply step of moving a gas from the battery case into the auxiliary case.

An anodic member, an electrochemical device having an anodic member, and a method for manufacturing an anodic member for a lithium-ion battery. The method uses nanoparticles of an electrically insulating material that conducts lithium ions, is stable in contact with metallic lithium, does not insert lithium at potentials of between 0 V and 4.3 V with respect to the potential of the lithium, and has a relatively low melting point.

Systems and methods are provided for improvement of cycle life in Si/Li batteries using high temperature deep discharge cycling. One or more deep discharge cycles may be applied to a cell that includes a cathode, a separator, and a silicon-dominant anode, with each of the one or more deep discharge cycles including at least charging and discharging the cell, and with each of the one or more deep discharge cycles being performed at a higher temperature that is above normal operating temperature range. The higher temperature may be 40° C. or higher, 45° C. or higher, or around 45° C.

A press jig includes a pair of plate-shaped members, each of which includes a plurality of protrusions spaced apart from each other on a surface thereof, the protrusions being configured to come into contact with the secondary battery when pressed; and a heating unit that heats the protrusions formed on the plate-shaped member. A method of manufacturing a secondary battery using the same is also provided.

The present technology relates to a lithium secondary battery. The lithium secondary battery has advantages of excellent high-rate discharge characteristics at room temperature as well as excellent discharge efficiency at low temperature when a coating layer containing specific contents of a lithium element, a sulfur element, and a nitrogen element is provided on a positive electrode mixture layer including a positive electrode active material.