Patents by Inventor Kumiko Takagi
Kumiko Takagi 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).
-
Patent number: 9985262Abstract: A battery capable of improving the energy density and improving the battery characteristics such as cycle characteristics and high temperature storage characteristics. A cathode and an anode are oppositely arranged with a separator in between. The open circuit voltage in full charge is in the range from 4.25 V to 6.00 V. The separator has a base material layer and a surface layer. The surface layer opposed to the cathode is formed from at least one from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polypropylene, and aramid.Type: GrantFiled: July 10, 2015Date of Patent: May 29, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kenichi Ogawa, Hiroyuki Akashi, Kumiko Takagi, Tomitaro Hara, Yoshiaki Obana, Yosuke Hosoya
-
Patent number: 9583791Abstract: An electrolytic solution and a battery capable of improving cycle characteristics are provided. A separator is impregnated with an electrolytic solution. The electrolytic solution includes a cyclic carbonate derivative having a halogen atom such as 4-fluoro-1,3-dioxolane-2-one or 4-chloro-1,3-dioxolane-2-one and a cyclic imide salt such as 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium. Thereby, the decomposition reaction of the electrolytic solution can be inhibited, and the cycle characteristics can be improved.Type: GrantFiled: April 7, 2006Date of Patent: February 28, 2017Assignee: SONY CORPORATIONInventors: Atsumichi Kawashima, Masayuki Ihara, Hiroyuki Yamaguchi, Hiroshi Horiuchi, Tadahiko Kubota, Akira Yamaguchi, Kumiko Takagi
-
Publication number: 20150318533Abstract: A battery capable of improving the energy density and improving the battery characteristics such as cycle characteristics and high temperature storage characteristics. A cathode and an anode are oppositely arranged with a separator in between. The open circuit voltage in full charge is in the range from 4.25 V to 6.00 V. The separator has a base material layer and a surface layer. The surface layer opposed to the cathode is formed from at least one from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polypropylene, and aramid.Type: ApplicationFiled: July 10, 2015Publication date: November 5, 2015Inventors: Kenichi Ogawa, Hiroyuki Akashi, Kumiko Takagi, Tomitaro Hara, Yoshiaki Obana, Yosuke Hosoya
-
Patent number: 8679683Abstract: An electrolytic solution capable of improving battery characteristics even at high temperature, and a battery using the electrolytic solution are provided. A separator is impregnated with an electrolytic solution. The electrolytic solution includes a cyclic imide salt such as 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium and a light metal salt such as difluoro[oxalato-O,O?] lithium borate or bis[oxalato-O,O?] lithium borate. Thereby, the decomposition reaction of the electrolytic solution can be prevented even at high temperature, and the battery characteristics can be improved.Type: GrantFiled: March 12, 2007Date of Patent: March 25, 2014Assignee: Sony CorporationInventors: Akira Yamaguchi, Atsumichi Kawashima, Masayuki Ihara, Hiroshi Horiuchi, Hiroyuki Yamaguchi, Tadahiko Kubota, Kumiko Takagi
-
Patent number: 8586245Abstract: A battery capable of improving battery characteristics such as cycle characteristics and high temperature storage characteristics is provided. An anode includes an anode active material which includes Sn or Si as an element. A separator is impregnated with an electrolyte solution, and the electrolyte solution includes an acid anhydride such as succinic anhydride or a derivative thereof. Thereby, a coating is formed on the anode, and the decomposition of the electrolyte solution in the anode can be prevented. An electrolyte solution to which 4-fluoro-1,3-dioxolane-2-one is mixed is more preferably used.Type: GrantFiled: November 3, 2005Date of Patent: November 19, 2013Assignee: Sony CorporationInventors: Akira Yamaguchi, Kumiko Takagi, Yuzuru Fukushima, Satoshi Mizutani, Hiroshi Inoue, Atsumichi Kawashima
-
Publication number: 20120208056Abstract: A battery including: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead joined to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.Type: ApplicationFiled: April 25, 2012Publication date: August 16, 2012Applicant: SONY CORPORATIONInventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
-
Patent number: 8168320Abstract: A battery including: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead joined to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.Type: GrantFiled: July 23, 2010Date of Patent: May 1, 2012Assignee: Sony CorporationInventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
-
Publication number: 20110177399Abstract: A battery capable of improving battery characteristics such as cycle characteristics and high temperature storage characteristics is provided. An anode includes an anode active material which includes Sn or Si as an element. A separator is impregnated with an electrolyte solution, and the electrolyte solution includes an acid anhydride such as succinic anhydride or a derivative thereof. Thereby, a coating is formed on the anode, and the decomposition of the electrolyte solution in the anode can be prevented. An electrolyte solution to which 4-fluoro-1,3-dioxolane-2-one is mixed is more preferably used.Type: ApplicationFiled: March 29, 2011Publication date: July 21, 2011Applicant: SONY CORPORATIONInventors: Akira Yamaguchi, Kumiko Takagi, Yuzuru Fukushima, Satoshi Mizutani, Hiroshi Inoue, Atsumichi Kawashima
-
Publication number: 20100291425Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.Type: ApplicationFiled: July 23, 2010Publication date: November 18, 2010Applicant: SONY CORPORATIONInventors: Kumiko TAKAGI, Fumiko HASHIMOTO, Akira YAMAGUCHI, Yuzuru FUKUSHIMA, Hiroshi INOUE, Yasufumi MINATO
-
Patent number: 7807292Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.Type: GrantFiled: May 10, 2007Date of Patent: October 5, 2010Assignee: Sony CorporationInventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
-
Publication number: 20080280193Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.Type: ApplicationFiled: May 10, 2007Publication date: November 13, 2008Applicant: Sony CorporationInventors: Kumiko Takagi, Fumiko Hashimoto, Akira Yamaguchi, Yuzuru Fukushima, Hiroshi Inoue, Yasufumi Minato
-
Publication number: 20080193854Abstract: An electrolytic solution capable of improving battery characteristics even at high temperature, and a battery using the electrolytic solution are provided. A separator is impregnated with an electrolytic solution. The electrolyic solution includes a cyclic imide salt such as 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium and a light metal salt such as difluoro[oxalato-O,O?] lithium borate or bis[oxalato-O,O?] lithium borate. Thereby, the decomposition reaction of the electrolytic solution can be prevented even at high temperature, and the battery characteristics can be improved.Type: ApplicationFiled: March 12, 2007Publication date: August 14, 2008Inventors: Akira Yamaguchi, Atsumichi Kawashima, Masayuki Ihara, Hiroshi Horiuchi, Hiroyuki Yamaguchi, Tadahiko Kubota, Kumiko Takagi
-
Publication number: 20060228626Abstract: An electrolytic solution and a battery capable of improving cycle characteristics are provided. A separator is impregnated with an electrolytic solution. The electrolytic solution includes a cyclic carbonate derivative having a halogen atom such as 4-fluoro-1,3-dioxolane-2-one or 4-chloro-1,3-dioxolane-2-one and a cyclic imide salt such as 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium. Thereby, the decomposition reaction of the electrolytic solution can be inhibited, and the cycle characteristics can be improved.Type: ApplicationFiled: April 7, 2006Publication date: October 12, 2006Inventors: Atsumichi Kawashima, Masayuki Ihara, Hiroyuki Yamaguchi, Hiroshi Horiuchi, Tadahiko Kubota, Akira Yamaguchi, Kumiko Takagi
-
Publication number: 20060222958Abstract: A battery capable of improving high temperature characteristics is provided. An electrolytic solution is impregnated in a separator. The electrolytic solution contains an imide salt expressed by LiN(CnF2n+1SO2)(CmF2m+1SO2) (n and m are respectively an integer number from 1 to 4, and a different value from each other). Thereby, a coat stable even at high temperatures can be formed on the surface of a cathode or an anode, and chemical stability of the electrolytic solution at high temperatures can be improved. LiPF6 is preferably mixed in the electrolytic solution.Type: ApplicationFiled: April 3, 2006Publication date: October 5, 2006Inventors: Akira Yamaguchi, Takashi Murakami, Masayuki Ihara, Kumiko Takagi
-
Publication number: 20060222955Abstract: A battery capable of improving the energy density and improving the battery characteristics such as cycle characteristics and high temperature storage characteristics is provided. A cathode and an anode are oppositely arranged with a separator in between. The open circuit voltage in full charge is in the range from 4.25 V to 6.00 V. The separator has a base material layer and a surface layer. The surface layer opposed to the cathode is formed from at least one from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polypropylene, and aramid.Type: ApplicationFiled: April 4, 2006Publication date: October 5, 2006Inventors: Kenichi Ogawa, Hiroyuki Akashi, Kumiko Takagi, Tomitaro Hara, Yoshiaki Obana, Yosuke Hosoya
-
Publication number: 20060115739Abstract: A battery capable of improving battery characteristics such as cycle characteristics and high temperature storage characteristics is provided. An anode includes an anode active material which includes Sn or Si as an element. A separator is impregnated with an electrolyte solution, and the electrolyte solution includes an acid anhydride such as succinic anhydride or a derivative thereof. Thereby, a coating is formed on the anode, and the decomposition of the electrolyte solution in the anode can be prevented. An electrolyte solution to which 4-fluoro-1,3-dioxolane-2-one is mixed is more preferably used.Type: ApplicationFiled: November 3, 2005Publication date: June 1, 2006Inventors: Akira Yamaguchi, Kumiko Takagi, Yuzuru Fukushima, Satoshi Mizutani, Hiroshi Inoue, Atsumichi Kawashima