Abstract: A method for manufacturing ultrafine fibers having an average diameter of less than 1 ?m is implemented by an apparatus including a feeder and a drawing chamber in communication with the feeder via an orifice having a pressure difference. The method includes introducing a multifilament to the drawing chamber under the condition that the ratio of the cross-section of the multifilament to the cross-section of the orifice rectifier is 50% or less, and irradiating the discharged multifilament such that the center of the multifilament melted thereby is located 1 to 15 mm apart vertically below the orifice outlet to melt the leading portion of the multifilament and cause the multifilament to swing at a maximum angle of 5 to 80 degrees to the central orifice axis within a conical space, such that the melted leading portion of the multifilament is drawn by an air stream generated by the pressure difference.

Abstract: A nonaqueous electrolyte secondary battery comprising an anode (3), a cathode (2) and a nonaqueous electrolyte. The anode includes composite particles having a carbon material included in a metallic material. As the metallic material, a metal capable of electrochemically reacting with lithium in a nonaqueous electrolyte is included.

Abstract: A nonaqueous electrolyte secondary battery comprising an anode (3), a cathode (2) and a nonaqueous electrolyte. The anode includes composite particles having a carbon material included in a metallic material. As the metallic material, a metal capable of electrochemically reacting with lithium in a nonaqueous electrolyte is included.

Abstract: A method for manufacturing ultrafine fibers having an average diameter of less than 1 urn is implemented by an apparatus including a feeder and a drawing chamber in communication with the feeder via an orifice having a pressure difference. The method includes introducing a multifilament to the drawing chamber under the condition that the ratio of the cross-section of the multifilament to the cross-section of the orifice rectifier is 50% or less, and irradiating the discharged multifilament such that the center of the multifilament melted thereby is located I to 15 mm apart vertically below the orifice outlet to melt the leading portion of the multifilament and cause the multifilament to swing at a maximum angle of 5 to 80 degrees to the central orifice axis within a conical space, such that the melted leading portion of the multifilament is drawn by an air stream generated by the pressure difference.

Abstract: A nonaqueous electrolyte battery with a spirally coiled electrode body (10) including a cathode (11) having a cathode active material and an anode (12) having an anode active material which are coiled through a separator (13) in a battery can (1). As the separator (13), is used a separator having a plurality of laminated microporous films made of polyolefin which have different film layer thickness and average pore size. Specially, the separator (13) has three or more layers of microporous films made of polyolefin laminated. Further, the outermost layer of the separator is made of porous polypropylene and at least one layer of inner layers is made of porous polyethylene. The total of the thickness of layers made of porous polyethylene is located within a range of 40% to 84% as thick as the thickness of the separator. Thus, the temperature of a battery can be controlled, a reliability is enhanced and a productivity and cyclic characteristics are improved.

Abstract: A lithium-ion secondary battery separator resolves defects of a non-woven fabric separator which is not suitable for use in such a battery. The separator is thin and does not short-circuit and has excellent electrolyte retainability and rate characteristics. The separator includes a composite of a non-woven fabric having a basis weight of 2 to 20 g/m2 formed from fibers of a thermoplastic material having an average fiber diameter of 5 to 40 ?m and ultra-microfibers having an average fiber diameter of 1 ?m or less in an amount of ? to 3 times the mass of the non-woven fabric. The composite has a thickness of 10 to 40 ?m after heat-pressing treatment under conditions that the non-woven fabric has a glossiness (JIS Z 8741) measured at 60° in the range of 3 to 30 and a thickness of 10 to 40.

Abstract: The present invention provides a rechargeable organic electrolyte battery that can be safely used continuously even if abnormality in battery voltage control occurs during use. The rechargeable organic electrolyte battery comprises cathodes, anodes, insulating sheets comprising a resin having no oxygen-containing group electrically insulating the cathodes and anodes from each other, and an organic electrolyte containing reactive ionic species, all contained in a sealed structure, the terminals of the cathodes and anodes being externally pulled out, wherein the insulating sheets are each an assembly of nanoscale filaments and microscale filaments, or a laminate of an assembly of nanoscale filaments and an assembly of microscale filaments.

Abstract: A nonaqueous electrolyte secondary battery comprising an anode (3), a cathode (2) and a nonaqueous electrolyte. The anode includes composite particles having a carbon material included in a metallic material. As the metallic material, a metal capable of electrochemically reacting with lithium in a nonaqueous electrolyte is included.

Abstract: The present invention relates to a nonaqueous electrolyte secondary battery comprising an anode (3), a cathode (2) and a nonaqueous electrolyte. The anode forming this battery includes composite particles having a carbon material included in a metallic material. As the metallic material, metal capable of electrochemically reacting with lithium in a nonaqueous electrolyte is included.

Abstract: An organic electrolyte improves the organic electrolyte storage battery of an electric vehicle in the initial storage capacity that affects the possible cruising range. The electrolyte includes a compound represented by formula (1) below and a compound represented by formula (2) below: wherein R1 to R5 are each independently hydrogen, an alkyl group, a halogenated alkyl group, or halogen, R6 is an alkylene group or a halogenated alkylene group and R7 is a group having a symmetrical structure about R6 as the rotational axis; R1—R2—R3??(2) wherein R2 is a vinyl group, a cyclic carbonic acid ester group, cyclic sulfite group, chain carbonic acid ester group or chain sulfite group, or —SO3—, R1 and R3 are each independently hydrogen, a halogen, an alkyl group, a halogenated alkyl group, or a vinyl, phenyl or cyclohexyl group, and when R2 is —SO3—, R1 and R3 may bond to each other to form a ring.

Abstract: The present invention provides an electrolyte for a Li storage battery comprising a compound that can improve safety of a storage battery without causing the degradation in performances thereof and a Li storage battery comprising the electrolyte. The electrolyte comprises at least 1,1-diphenylethane the Li storage battery comprises the electrolyte. Particularly preferably provided are an electrolyte for a Li storage battery comprising 1,1-diphenylethane, a cyclic carbonate (e.g., ethylene carbonate), a chain carbonate (e.g., dimethyl carbonate, diethyl carbonate, ethyl methyl or ethylmethyl carbonate) and a Li salt and a Li storage battery comprising such an electrolyte.

Abstract: A lithium-ion secondary battery separator resolves defects of a non-woven fabric separator which is not suitable for use in such a battery. The separator is thin but does not short-circuit and has excellent electrolyte retainability and rate characteristics. The separator includes a composite of a non-woven fabric having a basis weight of 2 to 20 g/m2 formed from fibers of a thermoplastic material having an average fiber diameter of 5 to 40 ?m and ultra-microfibers having an average fiber diameter of 1 ?m or less in an amount of ? to 3 times the mass of the non-woven fabric. The composite has a thickness of 10 to 40 ?m after heat-pressing treatment under conditions such that the non-woven fabric has a glossiness (JIS Z 8741) measured at 60° in the range of 3 to 30 and a thickness of 10 to 40 ?m (if non-woven fabric alone subjected to treatment).

Abstract: Disclosed is a highly safe battery separator, in particular a separator for a lithium ion secondary battery, which reduces internal resistance, achieves good ionic conductivity, prevents passing of electrode active materials, and also prevents electrical short circuit by controlling deposition of lithium metal (dendrite). Also disclosed is a means for stably producing the battery separator with high productivity. Specifically disclosed are: a battery separator which is composed of a porous polyolefin sheet that is formed from a group of polyolefin nanofilaments that have an average filament diameter of less than 1 ?m and a filament size distribution of 0.2 or less; and a means for producing the battery separator.

Abstract: The present invention provides an electrolyte for a Li storage battery comprising a compound that can improve safety of a storage battery without causing the degradation in performances thereof and a Li storage battery comprising the electrolyte. The electrolyte comprises at least 1,1-diphenylethane the Li storage battery comprises the electrolyte. Particularly preferably provided are an electrolyte for a Li storage battery comprising 1,1-diphenylethane, a cyclic carbonate (e.g., ethylene carbonate), a chain carbonate (e.g., dimethyl carbonate, diethyl carbonate, ethyl methyl or ethylmethyl carbonate) and a Li salt and a Li storage battery comprising such an electrolyte.

Abstract: The present invention provides an organic electrolyte comprising a compound represented by formula (1) as a compound that can be used in organic electrolyte storage batteries with a high charge voltage of 4.7 V or higher (in formula 1, R3 to R16 are each independently hydrogen, a straight-chain or branched alkyl group having one to four carbon atoms, a halogen-containing straight-chain or branched alkyl group having one to four carbon atoms, halogen, a phenyl group having no substituent or having a substituent bonded thereto or a cyclohexyl group having no substituent or having a substituent bonded thereto, R1 and R2 are each independently hydrogen, a straight-chain or branched alkyl group having one to four carbon atoms or a halogen-containing straight-chain or branched alkyl group having one to four carbon atoms and R3 to R16 may bond to those next to each other to form a ring).

Abstract: The present invention provides an organic electrolyte that improve the organic electrolyte storage battery of an electric vehicle in the initial storage capacity that affects the possible cruising range, which electrolyte comprises a compound represented by formula (1) below: wherein R1 to R11 are each independently hydrogen, a straight-chain or branched alkyl group having one to four carbon atoms, a halogen-containing straight-chain or branched alkyl group having one to four carbon atoms, or halogen, R12 is a straight-chain or branched alkyl ene group having one to four carbon atoms or a halogen-containing straight-chain or branched alkylene group having one to four carbon atoms, R13 is a phenyl group having no substituent or having a substituent bonded thereto or a cyclohexyl group having no substituent or having a substituent bonded thereto.

Abstract: The present invention provides an organic electrolyte that improve the organic electrolyte storage battery of an electric vehicle in the initial storage capacity that affects the possible cruising range, which electrolyte comprises a compound having no rotational symmetry axis of the compounds represented by formula (1) below: wherein R1 to R5 are each independently hydrogen, an alkyl group, a halogenated alkyl group, or halogen, R6 is an alkylene group or a halogenated alkylene group and R7 is a phenyl group having no substituent or having a substituent (a straight-chain or branched alkyl group having one to four carbon atoms, halogen-containing straight-chain or branched alkyl group having one to four carbon atoms, or halogen) bonded thereto.

Abstract: Disclosed is a highly safe battery separator, in particular a separator for a lithium ion secondary battery, which reduces internal resistance, achieves good ionic conductivity, prevents passing of electrode active materials, and also prevents electrical short circuit by controlling deposition of lithium metal (dendrite). Also disclosed is a means for stably producing the battery separator with high productivity. Specifically disclosed are: a battery separator which is composed of a porous polyolefin sheet that is formed from a group of polyolefin nanofilaments that have an average filament diameter of less than 1 ?m and a filament size distribution of 0.2 or less; and a means for producing the battery separator.

Abstract: A powdered graphite and a nonaqueous electrolyte secondary battery are provided. A nonaqueous electrolyte secondary battery is provided which has a highly efficient charge and discharge performance and superior cycle properties. Spheroidizing treatment is appropriately performed for natural graphite having a high capacity by grinding and/or applying impact to form a negative electrode active material, and a negative electrode active layer formed therefrom is provided on a metal electrode foil. Subsequently, the metal electrode foil is applied with a magnetic field so that the spheroidized natural graphite is oriented, followed by drying and compression molding, thereby forming a negative electrode. By the use of this negative electrode, a nonaqueous electrolyte secondary battery can be formed having superior battery properties such as the cycle properties and peeling strength.

Abstract: A non-aqueous electrolyte secondary cell which achieves satisfactory low temperature characteristics and high safety against overcharging in combination. The cell includes a lithium-containing cathode, an anode capable of doping and undoping lithium, a non-aqueous electrolyte and a separator. The separator is made up by a plurality of layers of a porous material or materials presenting micro-sized pores. The layers of the porous material or materials is formed of micro-porous separator materials representing different combinations of the porosity, melting point or material/compositions.