Hitachi Maxell, Limited

Hitachi Maxwell, Ltd.

Maxell Holdings, Ltd.

Shigeo Aoyama

Atsushi Ueda

Shoji Saibara

Kazutaka Uchitomi

Yuichi Sakurai

Hideaki Katayama

Yoshinori Yamamoto

Kenji Sumiya

Hiromu Sugiyama

Masayuki Yamada

Toshihiro Abe

Yasushi Murakami

Seiichi Asada

Kiyoshi Sato

Eri Kojima

Fumio Togawa

Mitsuo Ueno

Mayumi Iwagawa

Nobuaki Matsumoto

Fusaji Kita

Makito Yokoe

Yoshinori Sato

Yoji Takeuchi

Jozo Shimizu

Satoru Yamaguchi

Yoshiharu Katsuta

Yoshio Takasu

Kouji Takazawa

Tetsuya Taki

Keigo Aoi

Masahiko Okada

Kiyomi Ishizawa

Hideyuki Morimoto

Miwa Miyamoto

Eri Yokoyama

Toshihiro Koyama

Takasu Yoshio

Sachie Kawadu

An electrochemical device having excellent safety at high temperature is provided by using a separator for an electrochemical device, which is made of a porous film comprising: a porous base () having a heat-resistant temperature of 150&#xb0; C. or higher and including filler particles (); at least one kind of shutdown resin () selected from the group consisting of resin A that has a melting point in a range of 80&#xb0; C. to 130&#xb0; C. and resin B that absorbs an electrolyte and swells due to heating, and the swelling degree is increased as the temperature rises; and a binder ().

Separator for electrochemical device, and electrochemical device

The separator for a battery according to the present invention is a separator for a battery including an insulator layer containing a fibrous material having a heat resistant temperature of equal to or higher than 150&#xb0; C., insulating inorganic fine particles and a binder, or a separator for a battery including a porous layer formed of a thermal melting resin and an insulator layer containing insulating inorganic fine particles and a binder, wherein water content per unit volume is equal to or smaller than 1 mg/cmwhen the separator is held for 24 hours in an atmosphere with a relative humidity of 60% at 20&#xb0; C. The use of the separator for a battery according to the present invention makes it possible to provide a lithium secondary battery that has favorable reliability and safety and is excellent in storage characteristics and charge-discharge cycle characteristics.

Separator for battery, method for manufacturing the same, and lithium secondary battery

Because of the composition represented by General Formula: LiNiMnMO(where 0&#x2266;x&#x2266;0.05, &#x2212;0.05&#x2266;x+&#x3b1;&#x2266;0.05, 0&#x2266;y&#x2266;0.4; &#x2212;0.1&#x2266;&#x3b4;&#x2266;0.1 (when 0&#x2266;y&#x2266;0.2) or &#x2212;0.24&#x2266;&#x3b4;&#x2266;0.24 (when 0.2&#x3c;y&#x2266;0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Lithium-containing complex oxide, non-aqueous secondary battery using the lithium-containing complex oxide, and method for producing the lithium-containing complex oxide

A negative electrode of the present invention has an active material layer composed of an intermetallic compound on a collector. The intermetallic compound is capable of occluding/desorbing lithium and contains at least one kind of element A selected from Sn, In, Ge, Ga, Pb, Al, Sb, and Si, and an element X that does not substantially react with Li. In the negative electrode, a ratio I/Iof highest peak intensities Iand Iof X-ray diffraction peaks derived from the intermetallic compound and the element A is 0.1 or less. By configuring a non-aqueous secondary battery using the above-mentioned negative electrode, the charging/discharging efficiency and cycle characteristics of a thin film electrode used for the negative electrode of the non-aqueous secondary battery are enhanced.

Negative electrode having intermetallic compound that occludes/desorbs lithium as an active material layer on collector for non-aqueous secondary battery and non-aqueous secondary battery using the same

An ion-conductive electrolyte which comprises a compound having in the molecule a structure represented by the following chemical formula and an electrolyte salt; and a cell employing the ion-conductive electrolyte. The ion-conductive electrolyte has a low vapor pressure, has a high ion conductivity even at room temperature, and has a high lithium ion transport number. With this ion-conductive electrolyte, a highly safe cell having excellent discharge characteristics can be provided.

Ion-conductive electrolyte and cell employing the same

An alloy material containing an intermetallic compound of metal that is alloyed with Li and metal that is not alloyed with Li, capable of repeatedly absorbing and desorbing Li, is formed on a collector made of a material that is not alloyed with Li, as a plurality of convex portions partitioned with gaps disposed thereamong, and an area the convex portions occupy on the collector is assumed to be 60 to 95% of the area of the collector. Because of this, an electrode containing an intermetallic compound capable of repeatedly absorbing and desorbing Li can be provided, which can configure a non-aqueous secondary battery having a higher charging/discharging efficiency, a larger discharging capacity, and more excellent high rate characteristics and cycle characteristics.

Electrode for non-aqueous secondary battery and non-aqueous secondary battery using the same

An electrode according to the invention can provide a non-aqueous electrolyte secondary battery having an ability to release a volume expansion at the time of charge and discharge as well as the time of a cycle. The electrode comprises a current collector made of a material which is not alloyed with Li, and a dot patternof a metallic material able to be alloyed with Li formed on the current collector. At the time of charge, since the volume expansion of each dotis carried out so as to bury adjoining crevicesbetween the dots, a stress generated is released, thereby degradation of an electrode being avoided. Each dot may also be made into porosity.

Electrode used for a non-aqueous electrolyte secondary battery and a non-aqueous electrolyte secondary battery used the same for a negative electrode

Because of the composition represented by General Formula: LiNiMnMO(where 0&#x2266;x&#x2266;0.05, &#x2212;0.05&#x2266;x+&#x3b1;&#x2266;0.05, 0&#x2266;y&#x2266;0.4; &#x2212;0.1&#x2266;&#x3b4;&#x2266;0.1 (when 0&#x2266;y&#x2266;0.2) or &#x2212;0.24&#x2266;&#x3b4;&#x2266;0.24 (when 0.2&#x2266;y&#x2266;0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Lithium-containing composite oxide and nonaqueous secondary cell using the same, and method for manufacturing the same

A lithium-containing complex oxide represented by General Formula: LiNiMnMO(where 0&#x2266;x&#x2266;0.15, &#x2212;0.05&#x2266;x+&#x3b1;&#x2266;0.2, 0&#x2266;y&#x2266;0.4; &#x2212;0.1&#x2266;&#x3b4;&#x2266;0.1 (when 0&#x2266;y&#x2266;0.2) or &#x2212;0.24&#x2266;&#x3b4;&#x2266;0.24 (when 0.2&#x3c;y&#x2266;0.4); and M is at least one element selected from the group consisting of Mg, Ti, Cr, Fe, Co, Cu, Zn, Al, Ge, Zr and Sn) is provided. The lithium-containing complex oxide contains secondary particles formed of flocculated primary particles. The primary particles have a mean particle diameter of 0.3 to 3 &#x3bc;m, and the secondary particles have a mean particle diameter of 5 to 20 &#x3bc;m. By using this lithium-containing complex oxide as a positive active material, a non-aqueous secondary battery having a high capacity, excellent cycle durability and excellent storage characteristics at a high temperature is achieved.

Active material for electrode and non-aqueous secondary battery using the same

A material capable of occluding/discharging a lithium ion or a lithium-ion-conducting material is made to adhere to a surface of a particle of a lithium transition metal composite nitride having a particle diameter of 0.01 to 30 &#x3bc;m by a vapor phase method represented by a thin-film forming method selected from chemical vapor deposition, vapor deposition, ion plating and sputtering, thereby providing a composite electrode material with improved stability in the air as an electrode material capable of constituting an electrochemical element having a large capacity and improved cycle characteristics.

Composite electrode material and method for producing the same, and electrochemical element using the same

An electrode material for an electrochemical capacitor having a large capacity, having a titanium oxide compound such as titanium oxide, hydrated titanium oxide or their hydrogenated products, and at least one oxidizable and reducible metal element contained in the titanium oxide compound.

Electrode material for electrochemical capacitor, electrochemical capacitor comprising the same, and method for the production of the same

A copper-boron double oxide of the formula: Cu M B O in which M is a metal atom, and j, k, m and n are each a positive integer, a copper-molybdenum double oxide of the formula: Cu Mo O in which x, y and z are each a positive integer, or a copper double oxide of the formula: CuM&prime; O in which M&prime; is at least one element selected from the group consisting of B, Al, Ga, Mn, Co, Ni and a rare earth element is useful as a positive electrode-active material of a lithium secondary cell.

Positive electrode-active material and lithium cell comprising the same

The present invention relates to a pigmented ink, in particular, an ink suitable for an ink-jet printing method comprising jet of ink droplets from a print head. More particularly, it relates to a pigmented ink excellent in the dispersibility and dispersion stability of pigment particles, storage stability, etc. There is provided a pigmented ink which comprises (1) an organic pigment having a surface made hydrophobic by adsorption thereon or binding thereto of an organic substance, (2) an amphiphilic compound composed of a poly(ethylene oxide) as a hydrophilic portion and an alkyl group and/or an aromatic group as a hydrophobic portion, and (3) water, and is excellent in the dispersion stability of pigment particles and storage stability by virtue of the above composition.

Pigmented ink and process for production thereof

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Otsu, Japan

Shigeo Aoyama