Provided are an electrode wherein a short-circuit preventing film laminated on the surface of the electrode can prevent a short circuit between a cathode and an anode when a battery is overheated; a secondary battery using the electrode; and a method for manufacturing the electrode. The secondary battery electrode includes: an electrode current collector; an active material layer formed on the electrode current collector; and a short-circuit preventing film laminated on the active material layer, wherein the short-circuit preventing film includes a nanoweb type porous membrane which is formed by integrating nanofiber strands obtained by electrospinning polyacrylonitrile (PAN).

A secondary battery includes: an electrode assembly including a negative electrode plate, a positive electrode plate, and a separator between the negative electrode plate and the positive electrode plate; and a case accommodating the electrode assembly. The electrode assembly includes an adhesive part on an outermost region of the electrode assembly. The adhesive part is arranged to cover a boundary line between the negative electrode plate and the separator or between the positive electrode plate and the separator, and is bonded to the case.

Provided is a binder composition for a non-aqueous secondary battery having excellent aggregation resistance. The binder composition for a non-aqueous secondary battery contains a polymer and water and is accommodated inside a vessel. The number of particles therein having a dielectric relaxation time of not less than 3 ns and not more than 80 ns is 1×10.sup.3 particles/mL or less.

Provided is a laminate for an electrochemical device that can advantageously be used as a device member having excellent low-temperature adhesiveness and blocking resistance. The laminate includes a functional layer containing heat-resistant fine particles and adhesive particles and a substrate. The adhesive particles contain an adhesive polymer that includes an aromatic vinyl monomer unit and a wax that has a melting point of lower than 95° C. In plan view of the laminate from a side corresponding to the functional layer, the functional layer includes an adhesion region formed of the adhesive particles and a heat-resistant region formed of the heat-resistant fine particles. The volume-average particle diameter of the adhesive particles is larger than the average stacking direction height of the heat-resistant region.

Provided is a binder composition for a non-aqueous secondary battery with which it is possible to form a slurry composition for a non-aqueous secondary battery functional layer having excellent viscosity stability and a functional layer for a non-aqueous secondary battery having excellent pressability. The binder composition for a non-aqueous secondary battery contains water and a particulate polymer formed by a polymer including a block region composed of an aromatic vinyl monomer unit. The particulate polymer has a surface acid content of not less than 0.05 mmol/g and not more than 0.9 mmol/g.

An all-in-one electrode stack unit includes a first electrode, a second electrode, and a separation layer interposed between the first electrode and the second electrode.

The separation layer is a photocured PSA coating layer integrally formed on the first electrode.

The separation layer has a strength of 30 to 50 MPa and an adhesive force to the second electrode of 70 gf/20 mm to 90 gf/20 mm.

The first electrode, the separation layer, and the second electrode are laminated. The electrode stack unit is manufactured by a method. A lithium secondary battery includes the electrode stack unit.

An apparatus for manufacturing an electrode assembly includes a separator supply unit, table, separator guide, first adhesive supply unit, and pair of tensioners. The separator supply unit is configured for supplying a separator sheet from which a separator is formed. The table is configured for supporting electrodes and sections of the separator sheet. The separator guide is configured for guiding the separator sheet to fold in a particular folding direction. The first adhesive supply unit is configured for applying an adhesive to portions of the separator sheet and the electrodes supported by the table. The pair of tensioners are each configured for pressing an uppermost section of the separator sheet guided by the separator guide against the table or against a placed electrode that directly underlies the uppermost section. The electrode assembly is manufactured by a process using the apparatus.

An inspection device is a device that inspects the position of an electrode plate in a multilayer body, which is obtained by bonding a separator and the electrode plate to each other by means of an adhesive, from the separator side. This inspection device is provided with: an infrared light irradiation unit that irradiates the multilayer body, from the separator side, with infrared light that has a peak wavelength within the range of from 6.5 μm to 9.6 μm; a camera that takes an image of the infrared light that transmits through the separator and is reflected by the electrode plate; and a detection unit that detects the position of the electrode plate.

An apparatus for preparing a unit cell is provided. The apparatus includes a lower separator reel from which a lower separator sheet is unwound, a first nozzle configured to apply an adhesive to at least a portion of one surface facing upward of the unwound lower separator sheet, an upper separator reel from which an upper separator sheet is unwound, a second nozzle configured to apply an adhesive to at least a portion of one surface facing upward of the unwound upper separator sheet, and a first nip roll configured to turn opposite surfaces of the upper separator sheet upside down so that the one surface of the upper separator sheet to which the adhesive has been applied is directed downward and adheres to an upper surface of a first electrode stably placed on the one surface of the lower separator sheet.

An adhesive composition for an electrical storage device contains a polymer A and a solvent. The polymer A includes a nitrile group-containing monomer unit in a proportion of more than 50.0 mass % and not more than 90.0 mass %, and also includes an alicyclic (meth)acrylic acid ester monomer unit.