Provided is a post-treatment method of a lithium secondary battery including: an activation step of charging a heated lithium secondary battery to an activation voltage and maintaining the battery at the voltage, in a state in which the lithium secondary battery including a positive electrode including a nickel-rich (Ni-rich) lithium-transition metal composite oxide having a layered structure containing 0.8 moles or more of Ni based on a total of 1 mole of transition metals as a positive electrode active material; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte solution, which are built in a battery case, is heated, the activation voltage being equal to or higher than a voltage generating phase transition of the lithium-transition metal composite oxide.

The present invention relates an electrode notching apparatus. The electrode notching apparatus comprises: a notching unit shaping an electrode into a predetermined pattern; a heating unit drying the electrode processed by the notching unit; and a collecting unit collecting the electrode dried by the heating unit, wherein the heating unit comprises: a heating body having a drying space through which the electrode supplied by the notching unit passes; and heating members directly heating a surface of the electrode passing through the drying space to dry moisture remaining on the electrode.

The present invention relates to an apparatus for cleaning press rolls for electrodes, comprising two or more cleaning units provided with cleaning members having grains. According to the present invention, the apparatus for cleaning press rolls for electrodes comprises a plurality of, i.e., two or more, cleaning units, wherein the cleaning units respectively comprise cleaning members having grains with different directions, thus allowing a residual cleaning solution and contaminants to be effectively removed. In addition, when press rolls are cleaned using the apparatus for cleaning press rolls according to the present invention, an aqueous cleaning solution and an alcoholic cleaning solution, which have different properties, can be used together, and after cleaning, the cleaning solutions do not remain on the press rolls, and thus subsequently, secondary contamination of electrodes is prevented, and accordingly, when electrodes are manufactured, the occurrence of defects in the electrodes can be reduced.

The present invention provides a composition for a gel polymer electrolyte, the composition including: an oligomer represented by Formula 1; an additive; a polymerization initiator; a lithium salt; and a non-aqueous solvent, the additive including at least one compound selected from the group consisting of a substituted or unsubstituted phosphate-based compound and a substituted or unsubstituted benzene-based compound, a gel polymer electrolyte prepared using the same, and a lithium secondary battery.

One of the objects of the present invention is to suppress mixing of a first layer and a second layer while forming the second layer before drying the first layer when manufacturing the electrode for the secondary battery in which the first layer and the second layer are laminated on the current collector. A method for manufacturing an electrode used as a positive electrode and a negative electrode of a secondary battery according to the present invention comprises applying a first layer slurry to a surface of a current collector, applying a second layer slurry on the first layer slurry before the first layer slurry is dried, and drying the first layer slurry and the second layer slurry after applying the first layer slurry and the second layer slurry to obtain a laminated structure in which a first layer and a second layer are laminated in this order on the current collector. A viscosity of the first layer slurry is 12000 mPa.Math.s or more, and/or a viscosity of the second layer slurry is 4000 mPa.Math.s or more when the viscosities of the first layer slurry and the second layer slurry are measured at 25° C. with a shear rate of 1/sec.

One of the objects of the present invention is to suppress a short circuit due to metal deposition in an insulating layer in a secondary battery in which a positive electrode and a negative electrode are disposed to face each other via the insulating layer. The secondary battery comprises a battery element including at least one positive electrode 11 and at least one negative electrode 12, and a casing that seals the battery element together with an electrolyte. At least one of the positive electrode 11 and the negative electrode 12 comprises a current collector, an active material layer formed on at least one surface of the current collector, and an insulating layer 112 formed on the surface of the active material layer. The electrolyte comprises an electrolyte component and a crosslinked gelling agent. The gelling agent exists at least between the active material layer of the positive electrode 11 and the active material layer of the negative electrode 12, and the ratio Rg of the gelling agent to 100% by mass of the electrolyte component in between the active material layer of the positive electrode 11 and the active material layer of the negative electrode 12 is 0<Rg≤5% by mass.

This invention relates to a wind turbine blade component, a method of manufacturing such a wind turbine blade component and a wind turbine blade comprising the wind turbine blade component. The wind turbine blade component comprising a stack of layers arranged in a first group and in a second group, wherein the layers of each group has the same width. The layers of each group is continuously offset in an edgewise direction to form a tapered edge profile. The first group of layers may be arranged relative to the second group, or in an alternating order. The layers of the first group may further have a first length which is greater than a second length of the layers of the second group.

Method of making a current collecting grid for solar cells, including the steps of a) providing a continuous layer stack (1) on a substrate (8), the layer stack (1) including an upper (2) and a lower (3) conductive layer having a photoactive layer (4) interposed there between; b) selectively removing the upper conductive layer (2) and the photoactive layer (4) for obtaining a first contact hole (10) extending through the upper conductive layer (2) and photoactive layer (4) exposing the lower conductive layer (3); c) printing a front contact body (4) on the upper conductive layer (2) and a back contact body (5) in the first contact hole (10) on the lower conductive layer (3) and forming an electrically insulating first gap surrounding the back contact body (5) between the upper conductive layer (2) and the back contact body (2).

The present invention provides a composition for a gel polymer electrolyte, the composition including a first oligomer represented by Formula 1, a second oligomer including a first repeating unit represented by Formula 2a derived from a styrene monomer, a polymerization initiator, a lithium salt, and a non-aqueous solvent. The present invention also provides a gel polymer electrolyte prepared using the same, and a lithium secondary battery.

A cylindrical secondary battery configured to have a structure to which an adhesion unit, including an adhesive material, a conductive material, and a gas-generating material, is provided. The adhesion unit is configured to couple a cap assembly, which functions as a positive electrode terminal of the cylindrical secondary battery, and a positive electrode tab of a jelly-roll type electrode assembly to each other.