A high capacity lithium secondary battery with excellent safety is provided by suppressing expansion of a negative electrode active material during charge and increasing the content of a heat-resistant resin in a separator relative to conventional one. The lithium secondary battery includes: a negative electrode active material that comprises compound particles containing at least one metal element selected from the group consisting of Si, Sn, Al, and Zn; and a separator that has a first porous layer comprising polyolefin and a second porous layer comprising a heat-resistant resin. The separator contains 10 to 60 parts by weight of the second porous layer per 100 parts by weight of the first porous layer.

Lithium Secondary Battery

A subject for the invention is to improve the cycle characteristics of a high-capacity secondary battery containing an active material packed at a high density, by using a particulate active material having a low aspect ratio. The invention relates to a nonaqueous-electrolyte secondary battery comprising a negative electrode and a positive electrode each capable of occluding/releasing lithium, a separator, and a nonaqueous electrolyte solution comprising a nonaqueous solvent and a lithium salt, characterized in that the separator comprises a porous film made of a thermoplastic resin containing an inorganic filler, and at least either of the following is satisfied: the active material contained in the negative electrode is a particulate active material having an aspect ratio of from 1.02 to 3; and the active material contained in the positive electrode is a particulate active material having an aspect ratio of from 1.02 to 2.2.

Nonaqueous electrolyte secondary battery

According to one embodiment, a secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode current collector including elemental zinc, and a negative electrode layer disposed on the negative electrode current collector. The negative electrode layer includes a negative electrode active material including at least one compound selected from the group consisting of an oxide of titanium, a lithium-titanium oxide, and a lithium-titanium composite oxide. The electrolyte solution includes an aqueous solvent and an electrolyte.

Secondary battery, battery pack, and vehicle

Electrode assemblies easily impregnated with an electrolyte are provided. A sealing tape attached to the outer circumference of the electrode assembly comprises a material having an affinity for the electrolyte. Alternatively, the entire sealing tape or a portion of the tape is coated with the material. In another alternative, the surface of the sealing tape is rough, thereby improving wetting of the tape by the electrolyte and diffusion of the electrolyte into the tape. In another embodiment, first and second insulating plates comprise a material having an affinity for the electrolyte. In another alternative, the insulating plates comprise a mixture of a material having an affinity for the electrolyte and polypropylene or polyethylene. Alternatively, the surfaces of the insulating plates are coated with the material or with a surfactant that reduces the surface tension of the electrolyte.

Lithium Ion Secondary Battery

A moisture- or protein- adsorbability imparting agent, comprising a porous silica having a hexagonal pore structure, an average pore size of from 0.8 to 20 nm, an average particle size of 50 nm to 100 µm, a specific surface area of from 400 to 2000 m 2 /g, and a pore volume of from 0.1 to 3.0 cm 3 /g; a material having an adsorbability of moisture or a protein, comprising the moisture- or protein-adsorbability imparting agent; and use of the moisture- or protein-adsorbability imparting agent for imparting absorbability of moisture or a protein to a material selected from the group consisting of food wrapping materials; filtration aid agents; sanitary articles; compositions containing a synthetic resin; moisture-controlled material; covering materials for wounds; insulation substrates; coating materials for semiconductor devices; cosmetics; inkjet recording media; and compositions containing synthetic fibers.

Adsorptivity imparting agent containing porous silica

PROBLEM TO BE SOLVED: To provide a method for producing a spherical silica-based mesoporous body which is extremely high in the uniformity of particle sizes so that ≥90 wt.% of all particles to be obtained have particle sizes within the range of ±10% of the average particle size, and has a relatively large central pore diameter of 1.8 to 5 nm. SOLUTION: The method for producing a spherical silica-based mesoporous body comprises: a first stage where a silica raw material and a surfactant are mixed in a solvent to obtain porous precursor particles in which the surfactant is introduced into the silica raw material; and a second stage where the surfactant comprised in the porous precursor particles is removed to obtain the spherical silica-based mesoporous body. As the surfactant, alkyl ammonium halide expressed by general formula (1) [wherein, R 1 , R 2 and R 3 each denotes a 1 to 3C alkyl group; X denotes a halogen atom; and n denotes an integer of 13 to 25, respectively] is used, and, as the solvent, a mixed solvent of water and alcohol in which the alcohol content is 45 to 80 vol.% is used. COPYRIGHT: (C)2005,JPO&NCIPI

Method for producing spherical silica-based mesoporous body

PROBLEM TO BE SOLVED: To provide electrolyte particles, a cathode and an anode capable of substantially improving low-temperature characteristics of various batteries such as a lithium secondary battery, as well as a lithium secondary battery with excellent charge/discharge characteristics at low temperature SOLUTION: The lithium secondary battery provided with the cathode containing a cathode active material, the anode containing an anode active material, electrolyte solution with lithium salt dissolved in a solvent, and a separator arranged between the cathode and the anode with the electrolyte solution impregnated, has a silica system meso-porous body having a radial type structure with nanosize pores arrayed radially outward from the center part contained in at least one of the cathode, the anode, the electrolyte solution, and the separator COPYRIGHT: (C)2005,JPO&NCIPI

Electrolyte particle, cathode, anode and lithium secondary battery

PROBLEM TO BE SOLVED: To provide a spherical silica-based mesoporous body exhibiting an excellent acid catalyst performance. SOLUTION: The spherical silica-based mesoporous body has an average particle diameter of 0.01-3 μm and has radial pores having a median pore diameter of ≥1 nm, wherein the spherical silica-based mesoporous body is modified with an organic functional group containing a sulfonic acid group. COPYRIGHT: (C)2008,JPO&INPIT

Spherical silica-based mesoporous body, method for producing the same and acid catalyst using the same

PROBLEM TO BE SOLVED: To provide an oxide composite material consisting of an inorganic porous body with pores into which a relatively large amount of oxide nanoparticles are introduced and its production method and to provide an oxide composite material having a spherical shape having a monodisperse distribution and its production method. SOLUTION: The method for producing the oxide composite material comprises a first impregnation process in which the pores of the inorganic porous body are impregnated with a first solution comprising a metallocene or its derivative dissolved in a first solvent which is polymerized by heating, a polymerization process in which the first solvent is polymerized by heating the porous body and a first heat-treatment process in which the inorganic porous body is heat-treated at 400°C or higher in an atmosphere containing oxygen so that the metallocene or its derivative is thermally decomposed so as to produce a first metal oxide. The oxide composite material is produced with the method. COPYRIGHT: (C)2007,JPO&INPIT

Oxide composite material and its production method

PROBLEM TO BE SOLVED: To obtain a core-shell type spherical silica-based mesoporous body having mesopores modified with an organic group different in a hierarchical state and exhibiting different properties depending on pore sites in the same particle. SOLUTION: The core-shell type spherical silica-based mesoporous body comprises a core particle composed of a first silica into which a first organic group having at least one kind of a function group selected from the group consisting of a sulfonic acid group, a carboxylic acid group and an amino group is introduced and a shell layer which is composed of a second silica into which at least one kind of a second organic group selected from the group consisting of an aliphatic compound-based organic group and a cyclic compound-based organic group is introduced and is laminated to the outsides of the core particle. COPYRIGHT: (C)2008,JPO&INPIT

一久矢野

Papers

Method for producing spherical silica-based mesoporous body

Electrolyte particle, cathode, anode and lithium secondary battery

Spherical silica-based mesoporous body, method for producing the same and acid catalyst using the same

Oxide composite material and its production method

Core-shell type spherical silica-based mesoporous body and catalyst and adsorbent using the same

一久 矢野

Papers

Method for producing spherical silica-based mesoporous body

Electrolyte particle, cathode, anode and lithium secondary battery

Spherical silica-based mesoporous body, method for producing the same and acid catalyst using the same

Oxide composite material and its production method

Core-shell type spherical silica-based mesoporous body and catalyst and adsorbent using the same

一久矢野