Shin-etsu Chemical Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Sanyo Electric Co., Ltd.

Nissin Chemical Industry Co., Ltd.

Tetsuo Nakanishi

Kazuyuki Taniguchi

Ichiro Ono

Hiroshi Nakayama

Yukinori Satoh

Yoshiyasu Yamada

Meguru Kashida

Koichiro Watanabe

Satoru Miyawaki

Kazumasa Tsukioka

Mikio Aramata

Tetsuya Inukai

Toru Shimizu

Shigenori Hama

Norihiro Ose

Koji Sakuta

Kazuyuki Matsumura

Mitsutoshi Otaki

Hiroshi Tsumura

Kiyomi Tachibana

Atsushi Fukui

Akira Yamamoto

Michihiro Sugo

Shoji Ichinohe

Maruo Kamino

Hirofumi Fukuoka

Motoyuki Yamada

Mitsuo Asai

Hiroyuki Ohata

Masaaki Furuya

Yoshitaka Aoki

Teruki Ikeda

Masao Maruyama

Taizo Sunano

Shinji Miyadai

Yasuo Takano

Hiromi Nakabayashi

Toshiki Tanaka

Keiichi Uchida

Tatsuhiko Ikeda

Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein a BET specific surface area of the anode active material particles is 1.9 m/g or more and 14.2 m/g or less.

All-solid-state lithium ion secondary battery

Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein, for the anode active material particles, a value A obtained by the following formula (1) is 6.1 or more and 54.8 or less:&#x2003;&#x2003;Formula (1)where Sis a BET specific surface area (m/g) of the anode active material particles; dis a median diameter D50 (&#x3bc;m) of the anode active material particles; and D is a density (g/cm) of the anode active material particles.

A secondary battery comprising a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte is provided. The electrode material of which the positive and/or negative electrode is made contains hydrophobic spherical silica particles, which are obtained by introducing RSiOunits on surfaces of hydrophilic spherical silica particles of SiOunits, and further introducing RSiOunits on the surfaces, and have an average particle size of 5-1,000 nm, a particle size distribution D/Dof 2-3, and an average circularity of 0.8-1. All components of the battery are made hydrophobic for suppressing absorption of water within the battery and entry of water into the battery.

Nonaqueous electrolyte secondary battery

A negative electrode active material for a non-aqueous electrolyte secondary battery, wherein the negative electrode active material is represented by an elemental composition formula of Met-Si&#x2014;O&#x2014;C&#x2014;H (wherein Metrepresents one alkali metal element or a mixture of alkali metal elements), including: a silicate salt made of a silicon-based inorganic compound and the alkali metal, and fine particles composed of silicon, silicon alloy, or silicon oxide being dispersed in the silicate salt; and a negative electrode active material for a non-aqueous electrolyte secondary battery, wherein the negative electrode active material is represented by an elemental composition formula of Met-Si&#x2014;O&#x2014;C&#x2014;H (wherein Metrepresents one alkaline earth metal element or a mixture of alkaline earth metal elements), including: a silicate salt made of a silicon-based inorganic compound and the alkaline earth metal.

Negative electrode active material for non-aqueous electolyte secondary battery and method of producing the same

An active material comprising silica-attached particles in the form of host particles of silicon or silicon compound having spherical silica nano-particles attached to surfaces thereof is suited for use in nonaqueous electrolyte secondary batteries. The spherical silica nano-particles have an average particle size of 5-1000 nm, a particle size distribution D/Dof up to 3, and an average circularity of 0.8-1. The active material has high fluidity and exhibits improved cycle performance when used in nonaqueous electrolyte secondary batteries.

Active material for nonaqueous electrolyte secondary battery, negative electrode form, and nonaqueous electrolyte secondary battery

The present invention is directed to a silicon-containing particle for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery, wherein a crystal grain size is 300 nm or less, the crystal grain size being obtained by a Scherrer method from a full width at half maximum of a diffraction line attributable to Si (111) and near 2&#x3b8;=28.4&#xb0; in an x-ray diffraction pattern analysis, and a true density is more than 2.320 g/cmand less than 3.500 g/cm. The invention provides silicon-containing particles for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery that enable manufacture of a non-aqueous electrolyte secondary battery having an excellent cycle characteristics and a higher capacity compared with graphite types.

Silicon-containing particle, negative-electrode material for use in non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

A method for manufacturing a negative electrode active material for a secondary battery that uses a non-aqueous electrolyte, including the steps of: depositing silicon according to an electron beam vapor-deposition method with metallic silicon as a raw material on a substrate of which temperature is controlled from 800 to 1100&#xb0; C. at a vapor deposition rate exceeding 1 kg/hr in the range of film thickness of 2 to 30 mm; and pulverizing and classifying the deposited silicon to obtain the negative electrode active material. As a result, there is provided a method for manufacturing a negative electrode active material of silicon particles as an active material useful for a negative electrode of a non-aqueous electrolyte secondary battery that is, while maintaining high initial efficiency and battery capacity of silicon, excellent in the cycle characteristics and has a reduced volume change during charge/discharge.

Negative electrode active material for non-aqueous electrolyte secondary battery and method for manufacturing the same

The present invention is a method for manufacturing a negative electrode active material for a non-aqueous electrolyte secondary battery. The method includes depositing silicon on a substrate by vapor deposition by using a metallic silicon as a raw material, the substrate having a temperature controlled to 300&#xb0; C. to 800&#xb0; C. under reduced pressure; and pulverizing and classifying the deposited silicon. The resulting negative electrode active material composed of silicon particles is an active material useful as a negative electrode of a non-aqueous electrolyte secondary battery in which high initial efficiency and high battery capacity of silicon are kept, cycle performance is superior, and an amount of a change in volume decreases at the time of charge and discharge.

Method for manufacturing negative electrode active material for non-aqueous electrolyte secondary battery

The present invention is a negative electrode material for non-aqueous electrolyte secondary batteries, comprising at least: particles wherein silicon nanoparticles are dispersed in silicon oxide (silicon oxide particles); and a metal oxide coating formed on a surface of the silicon oxide particles. As a result, there is provided a negative electrode material for non-aqueous electrolyte secondary batteries that enables the production of a negative electrode suitable for lithium-ion secondary batteries and the like that provides improved safety and cycle performance over conventional negative electrode materials.

Negative electrode material for non-aqueous electrolyte secondary batteries, manufacturing method therefor, and lithium-ion secondary batteries

The present invention intends to provide silicon-containing particles that, when used as a negative electrode active material for a nonaqueous electrolyte secondary battery, can form a nonaqueous electrolyte secondary battery that is less in volume change during charge/discharge and has high initial efficiency and excellent cycle characteristics. The present invention provides silicon-containing particles that are used as a negative electrode active material for a nonaqueous electrolyte secondary battery and have a diffraction line with a peak at 2&#x3b8;=28.6&#xb0; in X-ray diffractometry, a negative electrode material for a nonaqueous electrolyte secondary battery therewith, a nonaqueous electrolyte secondary battery, and a method of manufacturing the silicon-containing particles.

Silicon-containing particles, negative electrode material for nonaqueous electrolyte secondary battery using the same, nonaqueous electrolyte secondary battery, and method of manufacturing silicon-containing particles

A Si&#x2014;O&#x2014;Al composite comprising silicon, silicon oxide, and aluminum oxide exhibits a powder XRD spectrum in which the intensity of a signal of silicon at 28.3&#xb0; is 1-9 times the intensity of a signal near 21&#xb0;. A negative electrode material comprising the Si&#x2014;O&#x2014;Al composite is used to construct a non-aqueous electrolyte secondary battery which is improved in 1st cycle charge/discharge efficiency and cycle performance while maintaining the high battery capacity and low volume expansion upon charging of silicon oxide.

Non-aqueous electrolyte secondary battery, negative electrode, negative electrode material, and preparation of Si&#x2014;O&#x2014;Al composite

The present invention is a method for manufacturing a negative electrode active material for a non-aqueous electrolyte secondary battery comprising at least depositing silicon on a substrate by vapor deposition by using a metallic silicon as a raw material, the substrate having a temperature controlled to 300&#xb0; C. to 800&#xb0; C. under reduced pressure, and pulverizing and classifying the deposited silicon. As a result, there is provided a method for manufacturing a negative electrode active material composed of silicon particles that is an active material useful as a negative electrode of a non-aqueous electrolyte secondary battery in which high initial efficiency and high battery capacity of silicon are kept, cycle performance is superior, and an amount of a change in volume decreases at the time of charge and discharge.

Method for manufacturing negative electrode active material for non-aqueous electrolyte secondary battery, negative electrode active material for non-aqueous electrolyte secondary battery, negative electrode material for non-aqueous electrolyte secondary battery, negative electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

An organopolysiloxane polymer having a glycerol derivative which can swell up by containing at least its own weight of a liquid oil, a pasty composition comprising a liquid oil blended with this polymer, and a cosmetic material containing these polymers or pasty compositions.

Organopolysiloxane polymer, pasty composition, and cosmetic preparation containing the composition

The present invention provides a negative electrode material for a non-aqueous electrolyte secondary battery that includes particles of a silicon-based active material, the particles of a silicon-based active material being coated with a film of an organosilicon compound that contains a perfluoropolyether group, and a non-aqueous electrolyte secondary battery therewith. As a result, there is provided a negative electrode material for a non-aqueous electrolyte secondary battery that is high in capacity, excellent in initial charge/discharge efficiency and cycle characteristics and high in safety and reliability, and a non-aqueous electrolyte secondary battery that uses the negative electrode material.

Negative electrode material for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery

This invention provides a negative electrode material for a rechargeable battery with a nonaqueous electrolyte, characterized in that the negative electrode material contains polycrystalline silicon particles as an active material, the particle diameter of crystallites of the polycrystalline silicon is not less than 20 nm and not more than 100 nm in terms of a crystallite size determined by the Scherrer method from the full width at half maximum of a diffraction line attributable to Si (111) around 2&#x3b8;=28.4&#xb0; in an x-ray diffraction pattern analysis, and the true specific gravity of the silicon particles is 2.300 to 2.320.

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Annaka, Japan

Tetsuo Nakanishi