Abstract: A method of manufacturing a composite film, the method including: a coating step including coating a coating liquid containing a resin on one surface or both surfaces of a porous substrate to form a coating layer; a solidification step including solidifying the resin by bringing the coating layer into contact with a solidifying liquid to obtain a composite film including the porous substrate and a porous layer that is formed on one surface or both surfaces of the porous substrate and that includes the resin; a water washing step including washing the composite film with water; and a drying step including drying by removing water from the composite film while transporting the composite film at a transport speed of 30 m/min or more using a drying apparatus including a drying device including a contact type heating device and a hot air blowing device, wherein the composite film is brought into contact with a contact type heating device as well as exposed to hot air blown from a hot air blowing device, to remove

Abstract: A method of manufacturing a composite film, the method including: preparing a coating liquid including a resin and a filler and having a viscosity of from 0.1 Pa·s to 5.0 Pa·s: removing aggregates contained in the coating liquid by making the coating liquid pass through a filter having a minimum pore diameter that is larger than a maximum particle diameter of the aggregates; applying the coating liquid that has been subjected to the aggregate removal on one surface or both surfaces of a porous substrate, to form a coating layer; and solidifying the resin contained in the coating layer, to obtain a composite film including: the porous substrate; and a porous layer that is formed on one surface or both surfaces of the porous substrate and that contains the resin and the filler.

Abstract: The embodiment according to the present disclosure provides a method of manufacturing a composite film. This method includes: subjecting a porous substrate containing a thermoplastic resin to a heat treatment at a temperature T which satisfies the Formula: Tg+60° C.?temperature T?Tm (wherein Tg represents a glass transition temperature (° C.) of the thermoplastic resin; and Tm represents a melting point (° C.) of the thermoplastic resin); coating a coating liquid containing at least a resin and a solvent on one surface or both surfaces of the porous substrate, which has been subjected to the heat treatment, to form a coating layer, with a tensile stress in a machine direction in the porous substrate adjusted to be within a range in which an elongation of the porous substrate is 2% or less; and solidifying the coating layer to obtain a composite film including the porous substrate and a porous layer containing at least the resin formed on one surface or both surfaces of the porous substrate.

Abstract: There is provided a solar cell in which a lower electrode layer, a photoelectric conversion layer having a chalcopyrite structure that includes a Group Ib element, a Group IIIb element, and a Group VIb element, and an upper electrode layer are sequentially formed on top of a substrate, wherein the solar cell is provided with a silicate layer between the substrate and the lower electrode layer.

Abstract: A nonaqueous secondary battery separator which is a composite porous membrane obtained by integrally covering both sides of a polyolefin microporous membrane having a gas permeability (JIS P8117) of between 15 seconds/100 cc·?m and 50 seconds/100 cc·?m per unit thickness and a film thickness of between 5 ?m and 25 ?m, with a porous layer composed of polymetaphenylene isophthalamide, and which exhibits both a shutdown function and effective heat resistance for meltdown resistance, as features desired for high-energy-density, high-output, large-sized, high-performance nonaqueous secondary batteries, while also having excellent handleability and ion permeability. The film thickness of the composite porous membrane is between 6 ?m and 35 ?m, the gas permeability (JIS P8117) is between 1.01 and 2.00 times that of the polyolefin microporous membrane, and the polymetaphenylene isophthalamide coating amount is between 1.0 g/m2 and 4.0 g/m2.

Abstract: There is provided a solar cell in which a lower electrode layer, a photoelectric conversion layer having a chalcopyrite structure that includes a Group Ib element, a Group IIIb element, and a Group VIb element, and an upper electrode layer are sequentially formed on top of a substrate, wherein the solar cell is provided with a silicate layer between the substrate and the lower electrode layer.

Abstract: This invention provides a separator for a nonaqueous rechargeable battery comprising a composite porous membrane that has both a shutdown function and heat resistance good enough to be effective for the suppression of meltdown, desired in a high-performance nonaqueous rechargeable battery having increased energy density, increased output, and increased size, and can realize a separator for a nonaqueous rechargeable battery having excellent handling properties and ion permeability. The composite porous membrane comprises a polyolefin microporous membrane having an air permeability per thickness of not less than 15 sec/100 cc·?m and not more than 50 sec/100 cc·?m (JIS P 8117) and a membrane thickness of not less than 5 ?m and not more than 25 ?m and a porous layer formed of poly-m-phenylene isophthalamide covering and integrated with both sides of the polyolefin microporous membrane.

Abstract: A separator, used for a lithium ion secondary battery that produces electromotive force by lithium doping/dedoping, which is composed of a porous film comprising an organic polymer (component A) which can swell in an electrolyte solution to retain it, surrounding a nonwoven fabric which cannot swell in the electrolyte solution, the porous film including an electrolyte solution non-swelling organic polymer with a melting point of 210° C. or above (component B) and an electrolyte solution non-swelling organic polymer with a melting point of 180° C. or below (component C), wherein component B is incorporated in the fiber composing the nonwoven fabric. The separator is highly safe and exhibits low reduction mechanical properties with respect to organic solvents.

Abstract: A non-aqueous secondary battery separator composed of a porous film made of an organic polymer, which includes a network-like support, swells in the electrolyte solution and retains the electrolyte solution, wherein the network-like support has a mean film thickness of 10-30 ?m, a basis weight of 6-20 g/m2, a Gurley value of no greater than 10 sec/100 cc, a McMullin number (25° C.) of no greater than 10 and a (McMullin number×mean film thickness (?m)) product of no greater than 200 ?m, and the separator has a mean film thickness of 10-35 ?m, a basis weight of 10-25 g/m2 and a Gurley value of no greater than 60 sec/100 cc, or exceeding 60 sec/100 cc and no greater than 500 sec/100 cc. Both battery characteristics and safety are achieved by establishing a specific electrochemical relationship between the effective active substance content of the battery system and the overcharge-preventing function characteristic values.

Abstract: A process for production of a composite porous film wherein a porous support, of which both sides have been coated with a solution (dope) of an organic polymer compound in a water-soluble organic solvent to form a coated film, is passed through an air gap step and conveyed into a coagulating bath comprising water or a mixture of water with the same solvent as the organic solvent, and is then immersed in the coagulating bath so that the coated film on both surfaces of the porous support directly contact the coagulating bath for coagulation, and is then washed and dried. This production process is suitable for production of non-aqueous secondary battery separators, and yields non-aqueous secondary battery separators with good handling properties and at low cost, whereby the ion permeability, adhesion with electrodes and electrolyte solution retention can be strictly controlled.

Abstract: A lithium ion secondary battery including a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte, where the separator essentially includes a porous sheet. The positive electrode active material and the negative electrode active material can be reversibly doped and dedoped such that, where Qp (mAh) is an electric charge necessary for causing total lithium contained in the positive electrode to be dedoped and Qn (mAh) is an electric charge necessary for causing lithium to fully dope the negative electrode, Qp>Qn. Further, when the battery is charged at a charging current Ic (mA) in a range of 0.2 Qn/h<Ic<2 Qn/h, in a range of an electric charge for charging Qc (mAh) of 1<Qc/Qn<Qp/Qn, doping of the positive electrode by lithium is initiated by producing lithium particles on the negative electrode by charging of the battery until Qc>Qp.

Abstract: A lithium ion secondary battery including a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte, where the separator essentially includes a porous sheet. The positive electrode active material and the negative electrode active material can be reversibly doped and dedoped such that, where Qp (mAh) is an electric charge necessary for causing total lithium contained in the positive electrode to be dedoped and Qn (mAh) is an electric charge necessary for causing lithium to fully dope the negative electrode, Qp>Qn. Further, when the battery is charged at a charging current Ic (mA) in a range of 0.2 Qn/h<Ic<2 Qn/h, in a range of an electric charge for charging Qc (mAh) of 1<Qc/Qn<Qp/Qn, doping of the positive electrode by lithium is initiated by producing lithium particles on the negative electrode by charging of the battery until Qc<Qp.

Abstract: A separator, used for a lithium ion secondary battery that produces electromotive force by lithium doping/dedoping, which is composed of a porous film comprising an organic polymer (component A) which can swell in an electrolyte solution to retain it, surrounding a nonwoven fabric which cannot swell in the electrolyte solution, the porous film including an electrolyte solution non-swelling organic polymer with a melting point of 210° C. or above (component B) and an electrolyte solution non-swelling organic polymer with a melting point of 180° C. or below (component C), wherein component B is incorporated in the fiber composing the nonwoven fabric. The separator is highly safe and exhibits low reduction mechanical properties with respect to organic solvents.

Abstract: A process for production of a composite porous film wherein a porous support, of which both sides have been coated with a solution (dope) of an organic polymer compound in a water-soluble organic solvent to form a coated film, is passed through an air gap step and conveyed into a coagulating bath comprising water or a mixture of water with the same solvent as the organic solvent, and is then immersed in the coagulating bath so that the coated film on both surfaces of the porous support directly contact the coagulating bath for coagulation, and is then washed and dried. This production process is suitable for production of non-aqueous secondary battery separators, and yields non-aqueous secondary battery separators with good handling properties and at low cost, whereby the ion permeability, adhesion with electrodes and electrolyte solution retention can be strictly controlled.