Patents by Inventor Yoshikatsu Yamamoto
Yoshikatsu Yamamoto 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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Positive electrode active material and non-aqueous electrolyte secondary battery containing the same
Patent number: 10153485Abstract: A positive electrode active material includes particles composed of a compound oxide; and coating layers composed of a compound oxide formed on at least parts of the surfaces of the particles. The particles have a layered structure and include a first compound oxide mainly composed of lithium and nickel. The coating layers include a second compound oxide mainly composed of lithium and titanium. The ratio by weight of the first compound oxide to the second compound oxide is between 96:4 and 65:35. The positive electrode active material has a mean particle diameter of 5 to 20 ?m.Type: GrantFiled: April 9, 2004Date of Patent: December 11, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yosuke Hosoya, Yoshikatsu Yamamoto -
Publication number: 20180062171Abstract: A cathode active material having a large capacity and improved charge/discharge cycle characteristics is disclosed. A battery has a cathode (2) having a cathode active material, an anode (3) and a non-aqueous electrolyte, and uses a cathode active material composed of a mixture of a first lithium-transition metal composite oxide containing Ni and Co and comprising a layer structure and a second lithium-transition metal composite oxide containing Ni and Mn and comprising a layer structure.Type: ApplicationFiled: September 5, 2017Publication date: March 1, 2018Inventors: Yosuke Hosoya, Yoshikatsu Yamamoto, Takashi Sato
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Patent number: 9450244Abstract: A battery capable of improving load characteristics, low-temperature characteristics and high-temperature cycle characteristics is provided. A cathode (13) includes a lithium cobalt complex oxide represented by LiaCoxMIyMIIzO2 (MI includes at least one kind selected from the group consisting of Al, Cr, V, Mn and Fe, MII includes at least one kind selected from the group consisting of Mg and Ca, 0.9?a?1.1, 0.9?x<1, 0.001?y?0.05, 0.001?z?0.05, x+y+z=1), and further includes Zr as a sub-component element. The content of Zr is within a range from 0.01 mol % to 10 mol % both inclusive as a ratio (Zr/Co) of Zr to Co in the lithium cobalt complex oxide.Type: GrantFiled: March 28, 2006Date of Patent: September 20, 2016Assignee: Sony CorporationInventors: Kei Yonezawa, Takashi Sato, Tsuyoshi Okawa, Yoshikatsu Yamamoto
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Patent number: 9440755Abstract: A liquid container includes a liquid containing bag and a case member. The liquid containing bag includes a flat end portion extending in a first direction. The case member defines an opening at one end and accommodates the liquid containing bag inserted from the opening in the first direction. The case member has an end portion accommodating section extending in the first direction and accommodating at least the end portion of the liquid containing bag, a main portion accommodating section accommodating a main portion of the liquid containing bag, and a partition wall that partitions the end portion accommodating section and the main portion accommodating section. The partition wall includes a slit extending along the first direction, with the end portion of the liquid containing bag being inserted through the slit.Type: GrantFiled: January 8, 2013Date of Patent: September 13, 2016Assignee: Seiko Epson CorporationInventors: Yuji Aoki, Masaru Takahashi, Yoshikatsu Yamamoto, Hisao Tanaka
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Patent number: 8439492Abstract: A cartridge includes: a liquid container adapted to contain a liquid; a filler port provided to fill the liquid into the liquid container; a supply port connected with a liquid supply tube provided in the printing device; a connection port provided to communicate with the liquid container; a liquid detection chamber adapted to vary volume according to inflow or non-inflow of the liquid through the connection port; a flow path arranged to connect the liquid detection chamber with the supply port; and a member provided to have the filler port, the supply port, the liquid detection chamber and the connection port arranged on one identical surface. The surface of the member has the supply port and the filler port arranged on one direction side relative to center of the surface, and the connection port arranged on an opposite direction side to the one direction side relative to the center. The liquid detection chamber is located between the connection port and the supply port.Type: GrantFiled: November 28, 2011Date of Patent: May 14, 2013Assignee: Seiko Epson CorporationInventors: Yuji Aoki, Masahiro Karasawa, Masaru Takahashi, Yoshikatsu Yamamoto, Hisao Tanaka
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Patent number: 8298707Abstract: A positive active material including a compound expressed by a general formula LimMxM?yM?zO2 (here, M designates at least one kind of element selected from Co, Ni and Mn, M? designates at least one kind of element selected from Al, Cr, V, Fe, Cu, Zn, Sn, Ti, Mg, Sr, B, Ga, In, Si and Ge, and M? designates at least one kind of element selected from Mg, Ca, B and Ga. Further, x is designated by an expression of 0.9?x<1, y is indicated by an expression of 0.001?y?0.5, z is indicated by an expression of 0?z?0.5, and m is indicated by an expression of 0.5?m) and lithium manganese oxide expressed by a general formula LisMn2-tMatO4 (here, the value of s is expressed by 0.9?s, the value of t is located within a range expressed by 0.01?t?0.5, and Ma indicates one or a plurality of elements between Fe, Co, Ni, Cu, Zn, Al, Sn, Cr, V, Ti, Mg, Ca, Sr, B, Ga, In, Si and Ge) are included, so that both a large capacity and the suppression of the rise of temperature of a battery upon overcharging operation are achieved.Type: GrantFiled: December 14, 2005Date of Patent: October 30, 2012Assignee: Sony CorporationInventors: Takehiko Tanaka, Yosuke Hosoya, Yoshikatsu Yamamoto, Kiyohiko Suzuki, Keizo Koga
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Publication number: 20120147102Abstract: A cartridge includes: a liquid container adapted to contain a liquid; a filler port provided to fill the liquid into the liquid container; a supply port connected with a liquid supply tube provided in the printing device; a connection port provided to communicate with the liquid container; a liquid detection chamber adapted to vary volume according to inflow or non-inflow of the liquid through the connection port; a flow path arranged to connect the liquid detection chamber with the supply port; and a member provided to have the filler port, the supply port, the liquid detection chamber and the connection port arranged on one identical surface. The surface of the member has the supply port and the filler port arranged on one direction side relative to center of the surface, and the connection port arranged on an opposite direction side to the one direction side relative to the center. The liquid detection chamber is located between the connection port and the supply port.Type: ApplicationFiled: November 28, 2011Publication date: June 14, 2012Inventors: Yuji AOKI, Masahiro Karasawa, Masaru Takahashi, Yoshikatsu Yamamoto, Hisao Tanaka
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Patent number: 8197968Abstract: A cathode contains: a lithium cobalt composite oxide expressed by LixCoaM1bM2cO2, where M1 denotes the first element; M2 indicates the second element; x, a, b, and c are set to values within ranges of 0.9?x?1.1, 0.9?a?1, 0.001?b?0.05, and 0.001?c?0.05; and a+b+c=1; a first sub-component element of at least one kind selected from a group containing Ti, Zr, and Hf, and a second sub-component element of at least one kind selected from a group containing Si, Ge, and Sn. 0.01 mol %?(content of the first sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide. 0.01 mol %?(content of the second sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide.Type: GrantFiled: May 1, 2007Date of Patent: June 12, 2012Assignee: Sony CorporationInventors: Takahisa Ishimatsu, Kei Yonezawa, Takashi Sato, Masumi Terauchi, Yoshikatsu Yamamoto
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Patent number: 8062794Abstract: A positive active material is composed of particles of a compound oxide of lithium and a transition metal. This compound oxide has a layered structure. A coating layer of an inorganic compound and a carbonaceous material is formed on at least part of each surface of the particles. The inorganic compound is a lithium compound. The weight ratio of the inorganic compound to the carbonaceous material ranges between 99:1 and 60:40. The weight ratio of the particles to the coating layers ranges between 98:2 and 70:30.Type: GrantFiled: April 9, 2004Date of Patent: November 22, 2011Assignee: Sony CorporationInventors: Yosuke Hosoya, Yoshikatsu Yamamoto
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Patent number: 7951490Abstract: A secondary battery both having a cathode and an anode with a separator in between. The cathode comprises a stable complex oxide LixNi1-y-zMnyMIzO2 and a highly conductive complex oxide LisMIIl-t-uMntMIIIuO2. Each of MI and MIII includes at least one kind selected from the group consisting of elements in Group 2 through Group 14, and MII includes at least one kind selected from the group consisting of Ni and Co, and the values of x, y, z, s, t and u are within a range of 0.9?x?1.1, 0.25?y?0.45, 0.01?z?0.30, 0.9?s?1.1, 0.05?t?0.20, and 0.01?u?0.10, respectively.Type: GrantFiled: October 15, 2007Date of Patent: May 31, 2011Assignee: Sony CorporationInventors: Yosuke Hosoya, Yoshikatsu Yamamoto
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Patent number: 7824810Abstract: An electrolytic solution capable of inhibiting self-discharge even under the high temperatures and a battery using the electrolytic solution are provided. A spirally wound electrode body in which a cathode and an anode are wound with a separator in between and spirally wound is included inside the battery can. An electrolytic solution is impregnated in the separator. The electrolytic solution contains ethylene sulfite, vinylene carbonate, LiPF6, and a light metal salt such as lithium difluoro[oxalato-O,O?]borate in a given range. Thereby, the self-discharge can be inhibited even under the high temperatures.Type: GrantFiled: June 8, 2006Date of Patent: November 2, 2010Assignee: Sony CorporationInventors: Shinsaku Ugawa, Yoshikatsu Yamamoto
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Patent number: 7763386Abstract: A cathode active material having a large capacity and improved charge/discharge cycle characteristics is disclosed. A battery has a cathode (2) having a cathode active material, an anode (3) and a non-aqueous electrolyte, and uses a cathode active material composed of a mixture of a first lithium-transition metal composite oxide containing Ni and Co and comprising a layer structure and a second lithium-transition metal composite oxide containing Ni and Mn and comprising a layer structure.Type: GrantFiled: January 8, 2003Date of Patent: July 27, 2010Assignee: Sony CorporationInventors: Yosuke Hosoya, Yoshikatsu Yamamoto, Takashi Sato
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Publication number: 20090197158Abstract: A nonaqueous electrolyte battery includes a cathode that is placed opposite an anode via a separator, an open circuit voltage in the full charge state is within a range of 4.25 to 6.00 V per a pair of the cathode and the anode, the separator includes a base material layer which includes a polyolefin resin material and a surface layer which is provided at least on the surface at the side of the cathode of the base material layer and includes at least one selected from the group including polyvinylidene fluoride, polytetrafluoroethylene, and polypropylene, and at least one selected from the group including aramid, polyimide, and ceramics is present on the outermost surface of the surface layer.Type: ApplicationFiled: January 21, 2009Publication date: August 6, 2009Applicant: SONY CORPORATIONInventors: Kenichi Ogawa, Atsushi Kajita, Yukako Teshima, Atsushi Nishimoto, Shinichi Hamasaki, Yoshikatsu Yamamoto, Hiroshi Imoto
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Publication number: 20090029254Abstract: A cathode active material having a large capacity and improved charge/discharge cycle characteristics is disclosed. A battery has a cathode (2) having a cathode active material, an anode (3) and a non-aqueous electrolyte, and uses a cathode active material composed of a mixture of a first lithium-transition metal composite oxide containing Ni and Co and comprising a layer structure and a second lithium-transition metal composite oxide containing Ni and Mn and comprising a layer structure.Type: ApplicationFiled: August 5, 2008Publication date: January 29, 2009Applicant: Sony CorporationInventors: Yosuke Hosoya, Yoshikatsu Yamamoto, Takashi Sato
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Publication number: 20090004567Abstract: A battery capable of improving load characteristics, low-temperature characteristics and high-temperature cycle characteristics is provided. A cathode (13) includes a lithium cobalt complex oxide represented by LiaCoxMIyMIIzO2 (MI includes at least one kind selected from the group consisting of Al, Cr, V, Mn and Fe, MII includes at least one kind selected from the group consisting of Mg and Ca, 0.9?a?1.1, 0.9?x<1, 0.001?y?0.05, 0.001?z?0.05, x+y+z=1), and further includes Zr as a sub-component element. The content of Zr is within a range from 0.01 mol % to 10 mol % both inclusive as a ratio (Zr/Co) of Zr to Co in the lithium cobalt complex oxide.Type: ApplicationFiled: March 28, 2006Publication date: January 1, 2009Applicant: SONY CORPORATIONInventors: Kei Yonezawa, Takashi Sato, Tsuyoshi Okawa, Yoshikatsu Yamamoto
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Patent number: 7442469Abstract: A cathode with a cathode active material is provided. The cathode active material is obtained by mixing a zirconium-containing lithium cobalt composite oxide containing zirconium as a sub-component element in a first lithium cobalt composite oxide expressed by a formula LitCoMsO2 (where M is at least one kind of element selected from Fe, V, Cr, Ti, Mg, Al, B, and Ca; 0?s?0.03; 0.05?t?1.15), and a second lithium cobalt composite oxide expressed by a formula LixCol-yAyO2 (where A is at least one kind of element selected from Mg and Al; 0.05?x?1.15; 0?y?0.03).Type: GrantFiled: February 13, 2007Date of Patent: October 28, 2008Assignee: Sony CorporationInventors: Takashi Sato, Takahisa Ishimatsu, Kei Yonezawa, Yoshikatsu Yamamoto
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Patent number: 7374841Abstract: A cathode active material includes: (a) first oxide including (1) lithium (Li), nickel (Ni) and manganese, (2) a first element MI selected from Group 2 to Group 14 elements, and (3) oxygen; (b) a second oxide including (1) lithium, (2) a second element MII including nickel and cobalt, (3) manganese, (4) a third element including at least one of the elements of Group 2 to Group 14 elements, except for nickel, cobalt and manganese, and (5) oxygen.Type: GrantFiled: December 5, 2002Date of Patent: May 20, 2008Assignee: Sony CorporationInventors: Yosuke Hosoya, Yoshikatsu Yamamoto
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Publication number: 20080090151Abstract: Provided are a cathode active material and a secondary battery both having a higher capacity and superior cycle characteristics and capable of obtaining a sufficient discharge capacity during large current discharge. A cathode (21) and an anode (22) with a separator (23) in between are spirally wound. The cathode (21) comprises a highly stable complex oxide LixNi1-y-zMnyMIzO2 and a highly conductive complex oxide Li8MII1-t-uMntMIIIuO2. Each of MI and MIII includes at least one kind selected from the group consisting of elements in Group 2 through Group 14, and MII includes at least one kind selected from the group consisting of Ni and Co, and the values of x, y, z, s, t and u are within a range of 0.9?x<1.1, 0.25?y?0.45, 0.01?z?0.30, 0.9?s<1.1, 0.05?t?0.20, and 0.01?u?0.10, respectively.Type: ApplicationFiled: October 15, 2007Publication date: April 17, 2008Applicant: SONY CORPORATIONInventors: Yosuke Hosoya, Yoshikatsu Yamamoto
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Publication number: 20070275303Abstract: A cathode contains: a lithium cobalt composite oxide expressed by LixCoaM1bM2cO2, where M1 denotes the first element; M2 indicates the second element; x, a, b, and c are set to values within ranges of 0.9?x?1.1, 0.9?a?1, 0.001?b?0.05, and 0.001?c?0.05; and a+b+c=1; a first sub-component element of at least one kind selected from a group containing Ti, Zr, and Hf, and a second sub-component element of at least one kind selected from a group containing Si, Ge, and Sn. 0.01 mol %?(content of the first sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide. 0.01 mol %?(content of the second sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide.Type: ApplicationFiled: May 1, 2007Publication date: November 29, 2007Applicant: SONY CORPORATIONInventors: Takahisa Ishimatsu, Kei Yonezawa, Takashi Sato, Masumi Terauchi, Yoshikatsu Yamamoto
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Publication number: 20070190421Abstract: A cathode with a cathode active material is provided. The cathode active material is obtained by mixing a zirconium-containing lithium cobalt composite oxide containing zirconium as a sub-component element in a first lithium cobalt composite oxide expressed by a formula LitCoMsO2 (where M is at least one kind of element selected from Fe, V, Cr, Ti, Mg, Al, B, and Ca; 0?s?0.03; 0.05?t?1.15), and a second lithium cobalt composite oxide expressed by a formula LixCo1-yAyO2 (where A is at least one kind of element selected from Mg and Al; 0.05?x?1.15; 0?y?0.03).Type: ApplicationFiled: February 13, 2007Publication date: August 16, 2007Applicant: Sony CorporationInventors: Takashi Sato, Takahisa Ishimatsu, Kei Yonezawa, Yoshikatsu Yamamoto