Abstract: A secondary battery which is highly safe even when it becomes in excessively high-temperature conditions and is excellent in cycle characteristics, and an electrode for a secondary battery are provided. The present invention relates to an electrode for a secondary battery comprising a maleimide compound and a conductive agent, wherein the conductive agent comprises at least one selected from carbon nanotube and carbon nanohorns.

Abstract: A lithium ion secondary battery comprising a negative electrode comprising one or more types of carbon selected from the group consisting of natural graphite, artificial graphite, non-graphitizable carbon and easily graphitizable carbon; and an electrolyte solution comprising a cyclic sulfonic acid ester represented by the following formula (1): wherein in the formula (1), R1 and R2 are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen group or an amino group with the proviso that R1 and R2 are not hydrogen atoms at the same time; R3 represents a linkage group selected from the group consisting of an alkylene group having 1 to 5 carbon atoms, a carbonyl group, a sulfonyl group, a fluoroalkylene group having 1 to 6 carbon atoms, and a divalent group having 2 to 6 carbon atoms in which alkylene units or fluoroalkylene units are bonded through an ether group.

Abstract: The purpose of the present invention is to provide a lithium-ion battery that exhibits excellent long-term life properties, does not suffer from rapid capacity degradation, and exhibits excellent charging/discharging characteristics in low-temperature environments. The present invention is directed to a negative electrode for a lithium ion battery, which comprises a negative electrode active material containing a graphite or an amorphous carbon, conductive additives containing a graphite, and a binder; and a lithium ion battery comprising this negative electrode. The negative electrode is characterized in that the negative electrode active material has a spherical or massive shape; the conductive additives have a platy shape; and part of an edge surface of the conductive additives contacts a surface of the negative electrode active material.

Abstract: The present invention provides a lithium ion secondary battery comprising: a positive electrode; a negative electrode comprising a negative electrode active material comprising at least one carbon material selected from the group consisting of a natural graphite, an artificial graphite, a non-graphitizable carbon and a graphitizable carbon; and an electrolyte solution comprising a specific cyclic disulfonate ester compound and an acid anhydride.

Abstract: A lithium ion secondary battery comprising a negative electrode comprising one or more types of carbon selected from the group consisting of natural graphite, artificial graphite, non-graphitizable carbon and easily graphitizable carbon; and an electrolyte solution comprising a cyclic sulfonic acid ester represented by the following formula (1); wherein in the formula (1), R1 and R2 are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen group or an amino group with the proviso that R1 and R2 are not hydrogen atoms at the same time; R3 represents a linkage group selected from the group consisting of an alkylene group having 1 to 5 carbon atoms, a carbonyl group, a sulfonyl group, a fluoroalkylene group having 1 to 6 carbon atoms, and a divalent group having 2 to 6 carbon atoms in which alkylene units or fluoroalkylene units are bonded through an ether group.

Abstract: The present invention relates to a negative electrode for a lithium ion secondary battery, the negative electrode containing a negative electrode active material containing a first carbon and a second carbon, in which the first carbon is spherical graphite, the second carbon is massive graphite, and the sulfur concentration in the first carbon (Sx) and the sulfur concentration in the second carbon (Sy) are each independently 0 ppm or more and 300 ppm or less.

Abstract: Provided is a lithium ion secondary cell using lithium manganese-based oxide as a positive electrode active material, wherein SEI films suppressing deterioration during repeated charge/discharge are easily formed not only on the negative electrode surface, but also on the positive electrode surface, deterioration in capacity upon use, in particular, under high-temperature environments is suppressed, charge/discharge cycle characteristics are improved and lifespan is lengthened. The lithium ion secondary cell includes a positive electrode active material layer containing lithium manganese-based oxide as a positive electrode active material, a negative electrode active material layer containing a negative electrode active material, and an electrolytic solution used to immerse the positive electrode active material layer and the negative electrode active material layer, wherein the positive electrode active material layer contains carbon nanotubes and the electrolytic solution contains sulfonic acid ester.

Abstract: An apparatus for manufacturing carbon nanohorns includes a production chamber configured to irradiate a solid carbon material with a laser beam to produce a product containing carbon nanohorns; and a separation mechanism configured to separate the product produced in the production chamber into a lightweight component and a heavyweight component. The heavyweight component includes carbon nanohorn aggregate with high purity, and high-purity carbon nanotubes can be obtained by collecting the heavyweight component.

Abstract: The purpose of the present invention is to provide a lithium-ion battery that exhibits excellent long-term life properties, does not suffer from rapid capacity degradation, and exhibits excellent charging/discharging characteristics in low-temperature environments. The present invention is directed to a negative electrode for a lithium ion battery, which comprises a negative electrode active material containing a graphite or an amorphous carbon, conductive additives containing a graphite, and a binder; and a lithium ion battery comprising this negative electrode. The negative electrode is characterized in that the negative electrode active material has a spherical or massive shape; the conductive additives have a platy shape; and part of an edge surface of the conductive additives contacts a surface of the negative electrode active material.

Abstract: The purpose of the present invention is to provide a lithium-ion battery that exhibits excellent long-term life properties, does not suffer from rapid capacity degradation, and exhibits excellent charging/discharging characteristics in low-temperature environments. The present invention is directed to a lithium ion battery comprising: a negative electrode which comprises a negative electrode active material containing at least one of a graphite and an amorphous carbon, conductive additives containing a graphite, and a binder; a nonaqueous electrolyte solution; and a positive electrode containing a positive electrode active material capable of occluding and releasing lithium. The negative electrode active material has a spherical or massive shape, the conductive additives have a platy shape, and a part of an edge surface of the conductive additives contacts a surface of the negative electrode active material.

Abstract: An apparatus for manufacturing carbon nanohorns includes a production chamber configured to irradiate a solid carbon material with a laser beam to produce a product containing carbon nanohorns; and a separation mechanism configured to separate the product produced in the production chamber into a lightweight component and a heavyweight component. The heavyweight component includes carbon nanohorn aggregate with high purity, and high-purity carbon nanotubes can be obtained by collecting the heavyweight component.

Abstract: A plume (109) is generated by irradiating a side face of a graphite rod (101) with a laser beam (103) to vaporize carbon. The vaporized carbon is introduced to a carbon nanohorn recovery chamber (119) through a recovery pipe (155), and the vaporized carbon is recovered as a carbon nanohorn assembly (117). A cooling tank (150) including liquid nitrogen (151) is arranged in the recovery pipe (155). While the cooling tank (150) controls the plume (109) at a low temperature, the cooling tank (150) cools the carbon vapor when the carbon vapor passes through the recovery pipe (155). The cooled carbon vapor is recovered as the carbon nanohorn assembly (117) which is controlled in the desired shape and dimensions.

Abstract: A method is provided for manufacturing a carbonaceous material in which fine carbon particles structured from clumps of numerous tube-shaped graphite sheets are aggregated, wherein the carbonaceous material can be readily obtained at a high yield and having a fine carbon particle-diameter distribution that is in a relatively narrow range. The present invention comprises a carbon ablation step performed in a neon-gas atmosphere within a chamber 10; and a cooling step for using the neon-gas atmosphere within the chamber to cool a gasified carbon (plume CP) generated in the ablation step. The carbonaceous material in which fine carbon particles are aggregated is obtained by performing the ablation step and the cooling step.

Abstract: In a nanocarbon-producing device (173), a plane mirror (169) and a parabolic mirror (171) are arranged in a production chamber (107). Light, emitted from a laser light source (111), transmitted through a ZnSe window (133) is reflected at the plane mirror (169) and the parabolic mirror (171), collected at the parabolic mirror (171), and then irradiated onto the surface of a graphite rod (101).

Abstract: Plural carbon nanohorn aggregates are mechanically mixed, and catalysts are supported on surfaces of the mixed carbon nanohorn aggregates. Alternatively gas is adsorbed on the surfaces of the mixed carbon nanohorn aggregates.

Abstract: A surface of a graphite target (139), irradiated with a laser beam (103), is formed in a plane. The graphite target (139) is held by a target holding unit (153) on a target supply plate (135). A plate holding unit (137) moves the target supply plate (135) in a translational manner, which allows an irradiation position of the laser beam (103) and the surface of the graphite target (139) to be relatively moved. A transportation pipe (141) communicated with a nanocarbon collecting chamber (119) is provided toward a direction in which a plume (109) is generated, and a generated carbon nanohorn aggregates (117) is collected in the nanocarbon collecting chamber (119).

Abstract: A plume (109) is generated by irradiating a side face of a graphite rod (101) with a laser beam (103) to vaporize carbon. The vaporized carbon is introduced to a carbon nanohorn recovery chamber (119) through a recovery pipe (155), and the vaporized carbon is recovered as a carbon nanohorn assembly (117). A cooling tank (150) including liquid nitrogen (151) is arranged in the recovery pipe (155). While the cooling tank (150) controls the plume (109) at a low temperature, the cooling tank (150) cools the carbon vapor when the carbon vapor passes through the recovery pipe (155). The cooled carbon vapor is recovered as the carbon nanohorn assembly (117) which is controlled in the desired shape and dimensions.

Abstract: In a nanocarbon manufacturing apparatus (183), a spray (181) is provided at a side face of a nanocarbon recovery chamber (119), and a mist (195) is sprayed on the entire nanocarbon recovery chamber (119) from the spray (181).

Abstract: In a production chamber (107), a cylindrical graphite rod (101) is fixed to a rotation device (115), enabling the graphite rod (101) to rotate around its longitudinal axis and to move right and left along its longitudinal axis. The lateral surface of the graphite rod (101) is irradiated with laser light (103) from a laser light source (111), and a nanocarbon recovering chamber (119) is installed in the direction of generation of plume (109). The pulse width of the laser light (103) is from 0.5 sec. to 1.25 sec.

Abstract: An apparatus for manufacturing nano-carbon including a laser source (111) which irradiates light to a surface of a graphite rod (101) and a nano-carbon recovery chamber (119) which recovers carbon vapor as nano-carbon, evaporated from the graphite rod (101) by irradiating light, has a contact surface being in contact with the surface of the graphite rod (101) and a holding roller (131) which movably holds the graphite rod (101) by frictional force generated between the contact surface and the surface of the graphite rod (101). The graphite rod (101) rotates and moves by the frictional force generated between the contact surface of the holding roller (131) and the surface of the graphite rod (101), thereby driving the holding roller (131) so that an irradiation position of the light irradiated to the surface of the graphite rod (101) covers over almost the entire area of the surface of the graphite rod (101).