Sanyo Electric Co., Ltd.

Ube Industries, Inc.

Other

Ikuro Nakane

Shin Fujitani

Hiroyuki Fujimoto

Shingo Tode

Akira Kinoshita

Yasufumi Takahashi

Satoshi Narukawa

Koji Abe

Hiroshi Watanabe

Naoki Imachi

Kazuhiro Miyoshi

Kazuhiro Hasegawa

Yasunobu Kodama

Tsutomu Sonozaki

Koji Nishio

Masataka Takeuchi

Hitoshi Hirano

Keiichi Kuramoto

Hiroyuki Ohno

Toyoki Fujihara

Yoichi Domoto

Nobuhiro Furukawa

Keiichi Sano

Toshihiko Saito

Seiichi Kiyama

Takashi Ohkubo

Shuichi Naijo

Hiroaki Izu

Akira Terakawa

Takanori Fujii

Satoshi Ishida

Yasuaki Yamamoto

Hiroshi Hosokawa

Takashi Kuwahara

Keiji Saisho

Kazuo Teraji

Takahisa Sakakibara

Norio Tsujioka

Ichiro Yoshida

Shiori Maeda

Koji c/o Ube Chemical Factory Abe

Kazuhiro c/o Ube Chemical Factory Miyoshi

A nonaqueous electrolyte secondary battery including a negative electrode containing a graphite material as the negative active material, a positive electrode containing lithium cobalt oxide as a main component of the positive active material and a nonaqueous electrolyte solution, the battery being characterized in that the lithium cobalt oxide contains a group IVA element selected from the group consisting of Ti, Zr and Hf and a group IIA element of the periodic table, the nonaqueous electrolyte solution contains 0.2-1.5% by weight of a sulfonyl-containing compound and preferably further contains 0.5-4% by weight of vinylene carbonate.

Nonaqueous electrolyte secondary battery using lithium cobalt oxide as a positive active material and a nonaqueous electrolyte containing a sulfonyl-containing compound and vinylene carbonate

A nonaqueous electrolyte secondary battery in which a lithium transition metal complex oxide containing at least Ni and Mn as transition metals and having a layered structure is used as a positive active material, the lithium transition metal complex oxide containing at least Ni and Mn as transition metals and having a layered structure further containing zirconium.

Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery which has a positive electrode containing lithium cobalt oxide as a positive active material, a negative electrode containing a graphite material and a nonaqueous electrolyte solution containing ethylene carbonate as a solvent and which is charged with an end-of-charge voltage of at least 4.3 V. Characteristically, the battery uses, as the positive active material, lithium cobalt oxide obtained by firing a mixture of a lithium salt, tricobalt tetraoxide (CoO) and a zirconium compound and having particle surfaces onto which the zirconium compound adheres.

Capacity degradation due to charge/discharge cycles is suppressed in either a non-aqueous electrolyte secondary cell provided with a positive electrode including, as a positive electrode active material, a lithium-transition metal complex oxide having a layered structure and containing at least Ni and Mn as transition metals, and a negative electrode containing a carbon material as a negative electrode active material and having a higher initial charge-discharge efficiency than that of the positive electrode, or an assembled battery having a plurality of cells each of which is the secondary cell. A control circuit incorporated in the secondary cell or the assembled battery, or in an apparatus using the secondary cell or the assembled battery, monitors the voltage of the secondary cell or each of the cells in the assembled battery so that the end-of-discharge voltage of each cell is 2.9 V or higher.

Method of controlling charge and discharge of non-aqueous electrolyte secondary cell

A nonaqueous electrolyte secondary battery includes a positive electrode containing a positive active material, a negative electrode containing a negative active material and a nonaqueous electrolyte. Characteristically, the positive active material comprises a mixture of a lithium transition metal complex oxide A obtained by incorporating at least Zr and Mg into LiCoOand a lithium transition metal complex oxide B having a layered structure and containing at least Ni and Mn as the transition metal.

A nonaqueous electrolyte secondary battery including a negative electrode containing a graphite material as the negative active material, a positive electrode containing lithium cobalt oxide as a main component of the positive active material and a nonaqueous electrolyte solution, the battery being characterized in that the lithium cobalt oxide contains a group IVA element and a group IIA element of the periodic table, the nonaqueous electrolyte solution contains 0.2-1.5% by weight of a sulfonyl-containing compound and preferably further contains 0.5-4% by weight of vinylene carbonate.

Nonaqueous electrolyte secondary battery using lithium cobalt oxide as a positive active material and a nonaqueous electrolyte containing a sulfonyl-containing compound

A nonaqueous electrolyte secondary battery wherein a material capable of occluding/discharging lithium is used as a negative electrode material and a lithium-transition metal composite oxide which contains Ni and Mn as the transition metal and has a layered structure is used as a positive electrode material is characterized in that a lithium-transition metal composite oxide having a BET specific surface area less than 3 m/g and a pH of 11.0 or less when 5 g of the lithium-transition metal composite oxide is immersed in 50 ml of purified water is used as the positive electrode active material.

A nonaqueous electrolyte secondary battery according to the invention comprises a positive electrode containing a positive electrode active material including lithium containing composite oxide having a layer crystal structure represented by a general formula of LiMnCoMO(0.9&#x2266;X&#x2266;1.1, 0.45&#x2266;a&#x2266;0.55, 0.45&#x2266;b&#x2266;0.55, 0&#x3c;c&#x2266;0.05 and 0.9&#x3c;a+b+c&#x2266;1.1 are set and M is at least one kind selected from Al, Mg, Sn, Ti and Zr), a negative electrode containing a negative electrode active material capable of intercalating and deintercalating lithium ion, a separator for separating the positive electrode from the negative electrode, and a nonacqueous electrolyte.

In a non-aqueous secondary cell having a positive electrode, a negative electrode, a nonaqueous electrolyte, a separator interposed between the positive electrode and the negative electrode, the positive electrode having a positive electrode active material including a chemical compound capable of reversibly intercalating lithium and the negative electrode having a negative electrode active material including a material capable of reversibly intercalating lithium, the separator has through holes formed therein for passing lithium dendrites therethrough.

Nonaqueous electrolyte secondary cell

The invention provides a non-aqueous electrolyte cell having a high working voltage in a low temperature range of 0&deg; C. or below and thereby attaining excellent low temperature discharge characteristics, a reduced internally-generated gas, and an excellent safety against heat. This is achieved by a cell comprising a non-aqueous electrolyte containing propylene carbonate and LiN(SO C F ) as an electrolyte salt, a graphite negative electrode, and a positive electrode having a positive electrode active material comprising a Ti-attached LiCoO in which a particle of titanium and/or titanium compound is attached on a surface of a particle of lithium cobalt oxide and a mole ratio of titanium and/or titanium compound in the Ti-attached LiCoO is within the range of from 0.00001 to 0.02.

Non-aqueous electrolyte cell having a positive electrode with Ti-attached LiCoO2

Sealed non-aqueous electrolyte cell having a casing of a sheet of laminated material

In a thin type sealed cell utilizing a cell case made of a laminated material, a storage life and reliability of the cell is increased by preventing a sectional surface at an end of the laminated material from being exposed in the cell case, and thereby a leakage of an electrolyte out of the cell and a short circuit in the cell are avoided. This is achieved by disposing a resin layer on the inner surface of the cell case composed of a sheet type laminated material, and covering the sectional surface existing inside the cell case with resin.

Thin type sealed cell and producing method thereof

The body of a micromachine has a plurality of energy-power converting means for receiving different forms of energy including rays, microwaves and sound waves and converting the different forms of energy to electric power, i.e., photoelectromotive devices, a microwave-power converter and an acousto-electromotive device. The electric power obtained by these means is supplied to a drive system and an operation system incorporated in the machine body.

Micromachines

A rechargeable non-aqueous secondary cell comprises, as main components thereof, a positive electrode, a negative electrode, a separator disposed between the positive electrode and negative electrode, and a non-aqueous electrolyte. The positive electrode includes a rechargeable active material, and the negative electrode is formed of lithium-aluminum alloy and has an aluminum plate added with manganese as a base material.

Non-aqueous electrolyte type secondary cell

Growing community of inventors

Kobe, Japan

Ikuro Nakane