Patents by Inventor Shunsuke Kurasawa
Shunsuke Kurasawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9831498Abstract: A secondary battery capable of improving cycle characteristics is provided. An anode includes: an anode active material layer on an anode current collector, the anode active material layer including a plurality of anode active material particles, in which the average particle area of the plurality of anode active material particles observed from a surface of the anode active material layer is within a range of 1 ?m2 to 60 ?m2 both inclusive.Type: GrantFiled: June 12, 2014Date of Patent: November 28, 2017Assignee: SONY CORPORATIONInventors: Momoe Adachi, Shunsuke Kurasawa, Isamu Konishiike, Kenichi Kawase
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Patent number: 9698416Abstract: A battery capable of improving cycle characteristics is provided. An anode includes: an anode current collector, and an anode active material layer arranged on the anode current collector, in which the anode active material layer includes an anode active material including silicon (Si), and including a pore group with a diameter ranging from 3 nm to 50 nm both inclusive, and the volumetric capacity per unit weight of silicon of the pore group with a diameter ranging from 3 nm to 50 nm both inclusive is 0.2 cm3/g or less, the volumetric capacity being measured by mercury porosimetry using a mercury porosimeter.Type: GrantFiled: November 17, 2015Date of Patent: July 4, 2017Assignee: SONY CORPORATIONInventors: Takakazu Hirose, Kenichi Kawase, Isamu Konishiike, Shunsuke Kurasawa, Masayuki Iwama, Koichi Matsumoto
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Publication number: 20160072126Abstract: A battery capable of improving cycle characteristics is provided. An anode includes: an anode current collector, and an anode active material layer arranged on the anode current collector, in which the anode active material layer includes an anode active material including silicon (Si), and including a pore group with a diameter ranging from 3 nm to 50 nm both inclusive, and the volumetric capacity per unit weight of silicon of the pore group with a diameter ranging from 3 nm to 50 nm both inclusive is 0.2 cm3/g or less, the volumetric capacity being measured by mercury porosimetry using a mercury porosimeter.Type: ApplicationFiled: November 17, 2015Publication date: March 10, 2016Inventors: Takakazu Hirose, Kenichi Kawase, Isamu Konishiike, Shunsuke Kurasawa, Masayuki Iwama, Koichi Matsumoto
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Patent number: 9059452Abstract: There is provided an anode for a lithium ion secondary battery capable of improving the cycle characteristics, a lithium ion secondary battery using the same, an electric power tool using the lithium ion secondary battery, an electrical vehicle using the lithium ion secondary battery, and an electric power storage system using the lithium ion secondary battery. The anode for a lithium ion secondary battery includes an anode active material layer in which a first layer and a second layer respectively containing silicon and a metal element as an anode active material are alternately layered on an anode current collector, and 1.02?A/B?50 is satisfied. A represents a silicon content ratio in the anode active material in the first layer, and B represents a silicon content ratio in the anode active material in the second layer.Type: GrantFiled: January 28, 2011Date of Patent: June 16, 2015Assignee: SONY CORPORATIONInventors: Shunsuke Kurasawa, Takashi Fujinaga, Momoe Adachi, Kenichi Kawase
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Patent number: 8968935Abstract: A lithium ion secondary battery having more superior cycle characteristics is provided. The lithium ion secondary battery includes a cathode, an anode, and an electrolyte. The anode has an anode active material layer in which a first layer containing silicon as an anode active material, and a second layer containing silicon and a metal element as an anode active material are alternately layered on an anode current collector. At least one of a lamellar oxide-containing region and a lamellar nitrogen-containing region is inserted in at least one of the first layer and the second layer.Type: GrantFiled: January 28, 2011Date of Patent: March 3, 2015Assignee: Sony CorporationInventors: Shunsuke Kurasawa, Kenichi Kawase, Takashi Fujinaga
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Patent number: 8932757Abstract: A lithium ion secondary battery having superior cycle characteristic is provided. The lithium ion secondary battery includes a cathode, an anode and an electrolyte. The anode has an anode active material layer including a plurality of anode active material fibers containing silicon as an element provided on an anode current collector.Type: GrantFiled: January 31, 2011Date of Patent: January 13, 2015Assignee: Sony CorporationInventors: Takashi Fujinaga, Shunsuke Kurasawa, Momoe Adachi, Kenichi Kawase
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Publication number: 20140295270Abstract: A secondary battery capable of improving cycle characteristics is provided. An anode includes: an anode active material layer on an anode current collector, the anode active material layer including a plurality of anode active material particles, in which the average particle area of the plurality of anode active material particles observed from a surface of the anode active material layer is within a range of 1 ?m2 to 60 ?m2 both inclusive.Type: ApplicationFiled: June 12, 2014Publication date: October 2, 2014Inventors: Momoe Adachi, Shunsuke Kurasawa, Isamu Konishiike, Kenichi Kawase
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Patent number: 8795886Abstract: A secondary battery capable of improving cycle characteristics is provided. An anode includes: an anode active material layer on an anode current collector, the anode active material layer including a plurality of anode active material particles, in which the average particle area of the plurality of anode active material particles observed from a surface of the anode active material layer is within a range of 1 ?m2 to 60 ?m2 both inclusive.Type: GrantFiled: March 23, 2009Date of Patent: August 5, 2014Assignee: Sony CorporationInventors: Momoe Adachi, Shunsuke Kurasawa, Isamu Konishiike, Kenichi Kawase
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Patent number: 8435594Abstract: An evaporation apparatus that is capable of stably forming a good quality thin film and is highly suitable for mass production is provided. The evaporation apparatus include an evaporation source discharging an evaporation material by heating, a retention member retaining an evaporation object, and a heat shield member that is located between the evaporation source and the evaporation object retained by the retention member, has an opening for passing the evaporation material in a state of vapor phase from the evaporation source to the evaporation object, and shields the evaporation object from part of radiation heat of the evaporation source. The heat shield member is located closer to the evaporation source than to the retention member.Type: GrantFiled: August 25, 2008Date of Patent: May 7, 2013Assignee: Sony CorporationInventors: Isamu Konishiike, Chisato Okina, Keisuke Tanabe, Atsuhiro Abe, Hidetoshi Nishiyama, Kenichi Kawase, Shunsuke Kurasawa, Koichi Matsumoto
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Patent number: 8383267Abstract: A secondary battery having high cycle characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolyte. In the anode, an anode active material layer containing silicon, carbon, and oxygen as an anode active material is provided on an anode current collector. In the anode active material, a content of carbon is from 0.2 atomic % to 10 atomic % both inclusive, and a content of oxygen is from 0.5 atomic % to 40 atomic % both inclusive. A ratio from 0.1% to 17.29% both inclusive of the silicon contained in the anode active material exists as Si—C bond.Type: GrantFiled: May 20, 2009Date of Patent: February 26, 2013Assignee: Sony CorporationInventors: Isamu Konishiike, Kotaro Satori, Kenichi Kawase, Shunsuke Kurasawa, Koichi Matsumoto, Takakazu Hirose, Masayuki Iwama, Takashi Fujinaga
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Patent number: 8197969Abstract: A battery capable of improving cycle characteristics and a manufacturing yield is provided. An anode includes: an anode current collector; and an anode active material layer arranged on the anode current collector, in which the anode active material layer includes an anode active material including a plurality of pores, and the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry.Type: GrantFiled: June 4, 2008Date of Patent: June 12, 2012Assignee: Sony CorporationInventors: Takakazu Hirose, Kenichi Kawase, Isamu Konishiike, Shunsuke Kurasawa, Masayuki Iwama, Koichi Matsumoto
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Publication number: 20120040242Abstract: A lithium ion secondary battery having more superior cycle characteristics is provided. The lithium ion secondary battery includes a cathode, an anode, and an electrolyte. The anode has an anode active material layer in which a first layer containing silicon as an anode active material, and a second layer containing silicon and a metal element as an anode active material are alternately layered on an anode current collector. At least one of a lamellar oxide-containing region and a lamellar nitrogen-containing region is inserted in at least one of the first layer and the second layer.Type: ApplicationFiled: January 28, 2011Publication date: February 16, 2012Applicant: SONY CORPORATIONInventors: Shunsuke Kurasawa, Kenichi Kawase, Takashi Fujinaga
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Publication number: 20110192622Abstract: There is provided an anode for a lithium ion secondary battery capable of improving the cycle characteristics, a lithium ion secondary battery using the same, an electric power tool using the lithium ion secondary battery, an electrical vehicle using the lithium ion secondary battery, and an electric power storage system using the lithium ion secondary battery. The anode for a lithium ion secondary battery includes an anode active material layer in which a first layer and a second layer respectively containing silicon and a metal element as an anode active material are alternately layered on an anode current collector, and 1.02?A/B?50 is satisfied. A represents a silicon content ratio in the anode active material in the first layer, and B represents a silicon content ratio in the anode active material in the second layer.Type: ApplicationFiled: January 28, 2011Publication date: August 11, 2011Applicant: SONY CORPORATIONInventors: Shunsuke Kurasawa, Takashi Fujinaga, Momoe Adachi, Kenichi Kawase
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Publication number: 20110192623Abstract: A lithium ion secondary battery having superior cycle characteristic is provided. The lithium ion secondary battery includes a cathode, an anode and an electrolyte. The anode has an anode active material layer including a plurality of anode active material fibers containing silicon as an element provided on an anode current collector.Type: ApplicationFiled: January 31, 2011Publication date: August 11, 2011Applicant: SONY CORPORATIONInventors: Takashi Fujinaga, Shunsuke Kurasawa, Momoe Adachi, Kenichi Kawase
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Publication number: 20100159337Abstract: A secondary battery is provided that is capable of improving the cycle characteristics. The secondary battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated into a separator provided between the cathode and the anode. In the anode, an anode active material layer and a compound layer are provided on both faces of an anode current collector. The anode active material layer contains a plurality of anode active material particles. The anode active material particles have a multilayer structure of an anode active material containing silicon as an element. The thickness of each layer in the multilayer structure ranges from 50 nm to 1050 nm. Thus, contact characteristics between each layer, contact characteristics between the anode active material layer and the anode current collector, and current collectivity are improved.Type: ApplicationFiled: December 21, 2009Publication date: June 24, 2010Applicant: SONY CORPORATIONInventors: Koichi Matsumoto, Kenichi Kawase, Isamu Konishiike, Shunsuke Kurasawa, Masayuki Iwama, Takakazu Hirose, Takashi Fujinaga
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Patent number: 7713433Abstract: W-type ferrite has improved magnetic properties, in particular, coercive force. A high coercive force (HcJ) and a high residual magnetic flux density (Br) can be simultaneously attained by a ferrite magnetic material comprising an oxide having a composition wherein metal elements Sr, Ba and Fe in total have a composition ratio represented by the formula Sr(1?x)BaxFe2+aFe3+b in which 0.03 ?x?0.80, 1.1?a?2.4, and 12.3?b?16.1. The ferrite magnetic material can form any of a ferrite sintered magnet, a ferrite magnet powder, a bonded magnet as a ferrite magnet powder dispersed in a resin, and a magnetic recording medium as a film-type magnetic phase. As for the ferrite sintered magnet, there can be attained a fine sintered structure that has a mean grain size of 0.6 ?m or less.Type: GrantFiled: March 3, 2005Date of Patent: May 11, 2010Assignee: TDK CorporationInventors: Yoshihiko Minachi, Noboru Ito, Junichi Nagaoka, Shunsuke Kurasawa, Taku Murase
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Publication number: 20090291371Abstract: A secondary battery having high cycle characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolyte. In the anode, an anode active material layer containing silicon, carbon, and oxygen as an anode active material is provided on an anode current collector. In the anode active material, a content of carbon is from 0.2 atomic % to 10 atomic % both inclusive, and a content of oxygen is from 0.5 atomic % to 40 atomic % both inclusive. A ratio from 0.1% to 17.29% both inclusive of the silicon contained in the anode active material exists as Si—C bond.Type: ApplicationFiled: May 20, 2009Publication date: November 26, 2009Applicant: Sony CorporationInventors: Isamu KONISHIIKE, Kotaro SATORI, Kenichi KAWASE, Shunsuke KURASAWA, Koichi MATSUMOTO, Takakazu HIROSE, Masayuki IWAMA, Takashi FUJINAGA
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Publication number: 20090246628Abstract: A secondary battery capable of improving cycle characteristics is provided. An anode includes: an anode active material layer on an anode current collector, the anode active material layer including a plurality of anode active material particles, in which the average particle area of the plurality of anode active material particles observed from a surface of the anode active material layer is within a range of 1 ?m2 to 60 ?m2 both inclusive.Type: ApplicationFiled: March 23, 2009Publication date: October 1, 2009Applicant: Sony CorporationInventors: Momoe ADACHI, Shunsuke KURASAWA, Isamu KONISHIIKE, Kenichi KAWASE
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Publication number: 20090148778Abstract: A battery having a high charge and discharge efficiency in which a spirally wound electrode body having a lamination structure of a cathode, an anode 80, and a separator is contained in a battery can. The anode has a structure in which an anode active material layer is provided on an anode current collector. The anode active material layer has a plurality of anode active material particles containing silicon, and the surface of the anode active material particles is covered with a compound film having a Si—O bond and a Si—N bond. Therefore, chemical stability of the anode is improved, and decomposition of an electrolytic solution can be prevented.Type: ApplicationFiled: December 2, 2008Publication date: June 11, 2009Applicant: SONY CORPORATIONInventors: Kenichi Kawase, Koichi Matsumoto, Hideki Nakai, Masayuki Iwama, Akinori Kita, Shunsuke Kurasawa, Isamu Konishiike, Takakazu Hirose
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Publication number: 20090061079Abstract: An evaporation apparatus that is capable of stably forming a good quality thin film and is highly suitable for mass production is provided. The evaporation apparatus include an evaporation source discharging an evaporation material by heating, a retention member retaining an evaporation object, and a heat shield member that is located between the evaporation source and the evaporation object retained by the retention member, has an opening for passing the evaporation material in a state of vapor phase from the evaporation source to the evaporation object, and shields the evaporation object from part of radiation heat of the evaporation source. The heat shield member is located closer to the evaporation source than to the retention member.Type: ApplicationFiled: August 25, 2008Publication date: March 5, 2009Applicant: Sony CorporationInventors: Isamu KONISHIIKE, Chisato Okina, Keisuke Tanabe, Atsuhiro Abe, Hidetoshi Nishiyama, Kenichi Kawase, Shunsuke Kurasawa, Koichi Matsumoto