Nec Corporation

Samsung Sdi Co., Inc.

Nec Energy Devices, Ltd.

Sony Corporation

Sony Interactive Entertainment Inc.

Sony Computer Entertainment Inc.

Samsung Mobile Display Co., Ltd.

Denso Corporation

Samsung Electronics Co., Ltd.

Samsung Display Co., Ltd.

Nec C Orporation

Sony Corpotation

Sony Corporation Entertainment Inc.

Envision Aesc Energy Devices Ltd.

Hitoshi Ishikawa

Satoru Toguchi

Atsushi Oda

Yukiko Morioka

Hiroshi Tada

Ikiko Shimanuki

Shinako Kaneko

Noboru Yoshida

Daisuke Kawasaki

Hiroshi Matsuike

Yasuharu Onishi

Atsushi Kamijo

Koichi Yoshida

Masaharu Satoh

Tomohisa Gotoh

Atsushi Kobayashi

Etsuo Hasegawa

Koji Utsugi

Takeshi Azami

Kazuhiko Inoue

Kazumasa Ito

Hideki Kabune

Shigeyuki Iwasa

Kaichiro Nakano

Junichi Sakamoto

Kentaro Nakahara

Kazuaki Matsumoto

Hideshi Yamada

Setsuo Kaneko

Takehiro Noguchi

Makihiro Otohata

Takashi Fukaumi

Hideaki Sasaki

Yasutaka Kono

Yoko Hashizume

Shinsaku Saitho

Jin Satoh

Kosuke Amano

Suguru Tamai

Junichi Yamanari

Fumito Ueda

Tomoharu Hayakawa

Tatsuya Aizawa

Chihiro Kanno

Eiji Suzuki

Atushi Oda

Yuukou Katou

Takahisa Suzuki

Shigeo Uno

Yu Takeuchi

Nobuhiko Makino

Masaharu Yoshimori

Kenichiro Yokota

Hiroyuki Goto

Yusuke Iida

Akinobu Nakamura

Tanio Nagasaki

Minoru Takahata

Tomohito Ito

Hajime Sugiyama

Shinsuke Koyama

Hiroyuki Morita

Masashi Kudo

Junichi Hosono

Yuka Chikugo

Yoshihiro Hirai

Hideki Takeuchi

Masamitsu Ozeki

Ippei Waki

Koh Ishiguchi

Rui Guerreiro

Atsuhiko Terada

Toshihiro Kamei

Tomohisa Kano

Mikako Hatakenaka

Hiroshi Kobayashi

Yasuharu Ohnishi

Yoko Hasizume

An object of the present invention is to provide a lithium ion secondary battery having a high energy density and improved cycle characteristics. The present invention is related to an electrode for a power storage device comprising a negative electrode mixture layer comprising: (a) a negative electrode active material (-) comprising 1% or more of a material comprising Si as a constituent element; (b) a first polymer (-) coating the negative electrode active material and comprising vinylidene fluoride as a monomer unit; and (c) a negative electrode binder (-) comprising a second polymer that has a molecular weight of 80,000 or more and comprises at least one monomer unit selected from the group consisting of acrylic acid, acrylate salt, methacrylic acid, and methacrylate salt.

Electrode for power storage device and method for producing same

A purpose of one embodiment of the present invention is to provide a lithium ion secondary battery which has improved cycle characteristics and comprises a Si material in the negative electrode. The lithium ion secondary battery according to the present invention comprises a negative electrode comprising a negative electrode active material, a positive electrode comprising a positive electrode active material and an electrolyte solution, wherein the negative electrode active material comprises a Si material, and a ratio (Ia/Ib) of a peak intensity (Ia) at 290 eV to a peak intensity (Ib) at 285 eV is 0.7 or more in a C1s spectrum obtained by surface analysis of the negative electrode by X-ray photoelectron spectroscopy.

Lithium ion secondary battery

The present invention relates to an electrolyte solution comprising a supporting salt, a nonaqueous solvent containing a compound having a viscosity of 1.0 mPa-s or less in an amount of more than 50% by volume in the nonaqueous solvent, and a halogenated cyclic acid anhydride. According to the present invention, an electrolyte solution capable of suppressing gas generation is provided.

Nonaqueous electrolyte solution and secondary battery

The present invention relates to a lithium secondary battery having a positive electrode comprising a positive electrode active material capable of absorbing and releasing lithium ions, a negative electrode comprising a negative electrode active material capable of absorbing and releasing lithium ions, and an electrolyte solution, wherein a positive electrode surface detection component comprises at least one negative secondary ion peak selected from CHSOand CHSO, and further comprises a negative secondary ion peak of SO&#x2014;, wherein the positive electrode surface detection component is detected when a primary ion is irradiated on the surface of the positive electrode active material by a Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) method. According to the present invention, it is possible to provide a lithium secondary battery having excellent cycle characteristics.

Lithium secondary battery and manufacturing method therefor

Methods and apparatus provide for, at each of plural calculation timings, associating pieces of position information indicating the positions of objects in a virtual space at the calculation timing with leaves and creates a complete binary tree in which position information reflecting pieces of the position information of child nodes is associated with an internal node, and a node shuffling section that shuffles 2&#xb7;2(n&#x2265;1) child nodes regarding each group of 2nodes on the basis of the position information associated with each of the 2&#xb7;2child nodes belonging to the 2nodes in each layer sequentially from the immediately-upper layer of the lowermost layer in the complete binary tree; and carrying out collision determination between objects by using the complete binary tree resulting from the shuffling by the node shuffling section.

Simulation method and device for determining collision between objects

When the particle size of a silicon material used for a negative electrode active material are small, a large surface area thereof easily causes a side reaction between the active material and an electrolyte solvent to occur, and the cycle characteristics of a lithium ion secondary battery decrease. In order to improve the cycle characteristics, a lithium ion secondary battery according to the present invention is characterized in comprising a negative electrode comprising a material comprising silicon as a constituent element and a polyacrylic acid, and an electrolyte solution comprising a fluoroethylene carbonate, wherein the 50% particle size of the material comprising silicon as a constituent element is 2 &#x3bc;m or less.

The present invention relates to an electrolytic solution comprising a cyclic disulfonic acid ester represented by the specific formula and a cyclic dicarboxylic acid ester represented by the specific formula, and the secondary battery using the same. According to the present invention, the electrolytic solution which can improve a cycle characteristics in a secondary battery and a secondary battery using the same can be provided.

Electrolytic solution and secondary battery

The present invention relates to an electrolytic solution comprising a cyclic dicarboxylic acid ester represented by the specific formula, and the secondary battery comprising the same. According to the present invention, the electrolytic solution comprising an additive which can improve a characteristics in a secondary battery and a secondary battery comprising the same can be provided.

It is an object of the present invention to provide an electrolytic solution capable of suppressing gas generation. The present exemplary embodiment is an electrolytic solution comprising a supporting salt, a nonaqueous solvent that dissolves the supporting salt, a cyclic sulfonic acid ester compound represented by predetermined formula (1), and an acid anhydride. According to the exemplary embodiment, an electrolytic solution capable of suppressing gas generation can be provided.

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.

Negative electrode for lithium ion secondary battery comprising negative electrode active material containing two carbons and method for manufacturing lithium ion secondary battery comprising same

A simulation apparatus which simulates a position of each of plural objects, which move in a virtual space together with time, at each of plural time points of calculation. The apparatus includes: an object pair information acquisition unit acquiring plural pieces of information of object pairs each including, as components thereof, two objects which contact with each other at each of the plural time points of calculation; an allocation unit allocating, at each of the plural time points of calculation, each of the plural object pairs to one of plural groups such that two or more object pairs which include a common object do not belong to the same group; and a calculation unit calculating, at each of the plural time points of calculation, an influence of contact of two objects included in each of the plural object pairs upon positions of the two objects.

Simulation apparatus, controlling method, program and information storage medium for the simulation apparatus

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.

A simulation apparatus which simulates a position of each of a plurality of objects, which move in a virtual space together with time, at each of a plural calculation time is disclosed. The apparatus includes: an object connection block for applying, to each object of each three or more objects contacting with each other at each of the plural calculation time points, a pointer value indicative of a contact destination object with which the object is in contact determining one of the three or more objects as a terminal end to connect the objects; and a pointer value updating block for repeating a pointer value updating process, by which the pointer value of each object is updated to the pointer value of the contact destination object indicated by the pointer value until the pointer values of all of the objects come to indicate the object of the terminal end.

Methods and apparatus for simulating positions of a plurality of objects in a virtual space, controlling method, program and information storage medium

Disclosed is an electrolyte solution for lithium secondary batteries, including a cyclic sulfonic acid ester represented by the general formula (1): wherein, in the general formula (1), Rand Reach independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, halogen or an amino group with the proviso that Rand Rdo not represent hydrogen atoms at the same time; and Rrepresents methylene which may be substituted with fluorine. Batteries using this electrolyte solution are excellent in battery properties and storage characteristics.

Electrolyte solution for secondary batteries, and secondary battery using same

The present invention relates to a gel electrolyte comprising a cyclic sulfonic acid ester represented by formula (1). According to the present invention, it is possible to provide a gel electrolyte capable of suppressing the self-discharge of a polymer secondary battery, and a polymer secondary battery using the gel electrolyte. wherein Rand Rare 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 Rand Rare not hydrogen atoms at the same time; Rrepresents 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.

Gel electrolyte and polymer secondary battery using same

Growing community of inventors

Tokyo, Japan

Hitoshi Ishikawa