Sanyo Electric Co., Ltd.

Fujitsu Ten Limited

Hideki Kitao

Yoshinori Kida

Noriyuki Shimizu

Naoya Nakanishi

Toshiyuki Nohma

Toyoki Fujihara

Toshitaka Yamato

Shinichi Iwamoto

Atsuhiro Funahashi

Kazuhisa Takeda

Katsunori Yanagida

Kouichi Satoh

Takanobu Chiga

Takaaki Ikemachi

Takao Inoue

Hiroyuki Akita

Masataka Nakamura

Takao Iwasaki

Yoshinao Oomoto

Osamu Iwata

Toshiyuki Nouma

Kouichi Sato

Good cycle performance is obtained with a non-aqueous electrolyte secondary battery having a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode contains as positive electrode active material a mixture of a lithium-manganese composite oxide and a lithium-transition metal composite oxide containing at least Ni and Mn as transition metals. The negative electrode contains as a negative electrode active material a material capable of intercalating and deintercalating lithium. Charging of the non-aqueous electrolyte secondary battery is controlled so that the end-of-charge voltage becomes higher than 4.3 V.

Method of charging and discharging a non-aqueous electrolyte secondary battery

A non-aqueous electrolyte secondary battery uses as its positive electrode active material a mixture of a first lithium-containing transition metal oxide containing nickel and manganese as transition metals and having a crystal structure belonging to the space group R3m and a second lithium-containing transition metal oxide containing nickel, cobalt, and manganese as transition metals and having a crystal structure belonging to the space group R3m, or a mixture of the first lithium-containing transition metal oxide and a lithium cobalt oxide. The first lithium-containing transition metal oxide is LiNiMnOwherein 1&#x2266;a&#x2266;1.5, 0.5&#x2266;x+y&#x2266;1, 0&#x3c;x&#x3c;1, and 0&#x3c;y&#x3c;1. The second lithium-containing transition metal oxide is LiNiMnCoOwherein 1&#x2266;b&#x2266;1.5, 0.5&#x2266;p+q+r&#x2266;1, 0&#x3c;p&#x3c;1, 0&#x3c;q&#x3c;1, and 0&#x3c;r&#x3c;1.

Non-aqueous electrolyte secondary battery

A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-nickel-manganese composite oxide having a hexagonal layered rock-salt structure that belongs to the space group R-3m, and contains lithium in 3b sites that contain transition metals. The lithium-nickel-manganese composite oxide is represented by the molecular formula Li[LiNiMnM]O, where: 0.2&#x3c;x&#x3c;0.4, 0.12&#x3c;y&#x3c;0.5, 0.3&#x3c;z&#x3c;0.62, and 0&#x2266;a&#x3c;0.5; M is at least one of Mg, Al, Zr, Ti, Nb, W, and Mo; and variables x, y, z, and b satisfy the expressions x&#x3e;(1&#x2212;2y)/3, &#xbc;&#x2266;y/z&#x2266;1.0, 0&#x3c;b/(y+z)&#x2266;0.1, and 1.0&#x2266;x+y+z+b&#x2266;1.1.

A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-nickel-manganese composite oxide having a hexagonal layered rock-salt structure that belongs to the space group R-3m, and contains lithium in 3b sites that contain transition metals. The lithium-nickel-manganese composite oxide is represented by the molecular formula Li[LiNiMnM]Owhere: 0&#x3c;x&#x3c;0.4, 0.12&#x3c;y&#x3c;0.5, 0.3&#x3c;z&#x3c;0.62, and 0&#x2266;a&#x3c;0.5; M is at least one metal element having a valency of from 2 to 6; and the variables x, y, z, and b satisfy the expressions x&#x3e;(1&#x2212;2y)/3, 1/4&#x2266;y/z&#x2266;1.0, 0&#x3c;b/(y+z)&#x2266;0.1, and 1.0&#x2266;x+y+z+b&#x2266;1.1.

In a content reproducing system (), which includes: a program judging unit () that judges whether or not a BD-J program being executed is a continuing program when an eject operation for a BD is detected during reproduction control in which reproduction of a content is controlled by execution of the BD-J program; and a reproduction control management unit () that causes the reproduction control performed by the BD-J program to be stopped if the BD-J program is not the continuing program and performs switching to the reproduction control for the content based on any one of media excluding the BD (), the reproduction control based on execution of the continuing program is continued if the BD-J program is the continuing program.

Control apparatus and method for content reproducing

A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-nickel-manganese composite oxide having a hexagonal layered rock-salt structure that belongs to the space group R-3m, and contains lithium in 3b sites that contain transition metals. The lithium-nickel-manganese composite oxide is represented by the molecular formula Li[LiNiMn]Owhere: 0&#x3c;x&#x3c;0.4, 0.12&#x3c;y&#x3c;0.5, 0.3&#x3c;z&#x3c;0.62, 0&#x2266;a&#x3c;0.5; and the variables x, y, and z satisfy the expressions x&#x3e;(1&#x2212;2y)/3, &#xbc;&#x2266;y/z&#x2266;1.0, and x+y+z=1.0. The balance between input power and output power and power characteristics are improved, and the initial charge-discharge efficiency and discharge capacity are enhanced.

The non-aqueous electrolyte secondary battery of the present invention uses, as the positive electrode active material, a mixture of a lithium-containing transition metal oxide LiNiMnO(wherein a, x, and y respectively satisfy the following relations: 1&#x3c;a&#x2266;1.5; 0.5&#x2266;x+y&#x2266;1; 0&#x3c;x&#x3c;1; and 0&#x3c;y&#x3c;1) containing nickel and manganese as transition metals and having the layered rock-salt type crystal structure of a hexagonal system belonging to space group R-3m and a lithium manganese oxide LiMnO(wherein b satisfies 0&#x2266;b&#x2266;0.33) having the spinel structure.

A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte comprising an electrolyte dissolved in a non-aqueous solvent. The negative electrode uses a low crystalline carbon coated graphite in which at least part of the surface of graphite is coated with a low crystalline carbon material having lower crystallinity than that of graphite as a negative electrode active material, and the non-aqueous electrolyte comprises a lithium salt which has oxalate complex as an anion, in addition to a mixed solvent of propylene carbonate and chain carbonate as a non-aqueous solvent.

A positive electrode for a secondary battery and a secondary battery. A mixture of at least a lithium metal oxide with a hexagonal crystal structure (belonging to the R3m space group) containing nickel (Ni) and a lithium manganese oxide with a rhombic crystal structure (belonging to the Pmmn space group) is used for the positive electrode active material. Furthermore, it is preferable for the lithium metal oxide described above to include manganese (Mn) and more preferable for cobalt (Co) to be included to improve the stability of the crystal structure. In addition, it is preferable for the proportion of the lithium manganese oxide in the mixture described above to be from 20% by weight to 80% by weight.

Positive electrode and nonaqueous electrolyte secondary battery

In a non-aqueous electrolyte secondary battery using a layered lithium-transition metal composite oxide as a positive electrode active material, elevated-temperature durability, that is, elevated-temperature storage performance is enhanced without degrading battery capacity. The non-aqueous electrolyte secondary battery includes: a positive electrode including, as a positive electrode active material, layered lithium-transition metal composite oxide containing lithium, nickel, and manganese; a negative electrode active material capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte having lithium ion conductivity, and the lithium-transition metal composite oxide contains a group IVA element and a group IIA element of the periodic table.

A lithium secondary battery is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte prepared by dissolving a solute in a non-aqueous solvent wherein a positive electrode active material of said positive electrode is composed of lithium-manganese composite oxide having a spinel structure and lithium-transition metal composite oxide having a layer structure containing at least nickel and lithium salt having oxalato complex as anion is admixed to said non-aqueous electrolyte.

Lithium secondary battery

A speech section detection apparatus capable of reliably detecting a speech section even for a word containing a glottal stop sound or for a word containing a succession of 's' column sounds or 'h' column sounds (sounds in the third column or the sixth column in the Japanese Goju-on Zu syllabary table). A speech signal detected by a microphone is amplified by a line amplifier, and converted by an analog/digital converter into a digital signal which is then stored in a memory. The stored speech signal is fetched into a pitch detector where a speech pitch is extracted by processing the speech signal in time domain. A gate signal generator controls the gate signal based on the speech pitch, and a speech section signal generator controls a speech section signal based on the gate signal. A word can be extracted by segmenting the speech signal stored in the memory in accordance with the speech section signal.

Speech section detection apparatus

A non-aqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein positive electrode active material is a mixture of lithium-manganese composite oxide having spinel structure represented by a general formula LiMnO(wherein a relationship 0&#x2266;z&#x2266;0.2 is satisfied) and lithium-transition metal composite oxide represented by the general formula LiNiCoMnO(wherein the relationships 0.5&#x3c;x+y&#x3c;1.0 and 0.1&#x3c;y&#x3c;0.6 are satisfied), and negative electrode active material is graphite coated with low crystalline carbon where whole or a part of a surface of first graphite material as a substrate is coated with second carbon material which is lower in crystallinity compared with the first graphite material.

In a non-aqueous electrolyte secondary battery provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, a positive electrode active material is a mixture of lithium-manganese composite oxide and at least one of lithium-nickel composite oxide represented by a general formula LiNiM1Oand lithium-cobalt composite oxide represented by the general formula LiCoM2O, and said non-aqueous electrolyte solution contains at least a saturated cyclic carbonic acid ester and an unsaturated cyclic carbonic acid ester having double bond of carbon where content by amount of said unsaturated cyclic carbonic acid ester having double bond of carbon is in a range of 1.0&#xd7;10to 2.4&#xd7;10g per positive electrode capacity 1 mAh.

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Kobe, Japan

Hideki Kitao