Patents by Inventor Masahiro Suguro

Masahiro Suguro 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: 10312494
    Abstract: Provided is a tab lead for a secondary battery including tab lead metal that has an adhesion interface with sealing resin. The adhesion interface is provided with a surface treatment film formed of a material including a polymer with carboxylic acid anhydride groups. Further provided is a nonaqueous electrolyte secondary battery including the tab lead for the secondary battery as a leading terminal of at least one of a positive electrode and a negative electrode.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: June 4, 2019
    Assignee: AUTOMOTIVE ENERGY SUPPLY CORPORATION
    Inventors: Masahiro Suguro, Hiromoto Taguchi, Yuji Tanjo
  • Patent number: 10290894
    Abstract: An exemplary embodiment of the present invention is a secondary battery which comprises a negative electrode and a battery electrolyte liquid comprising a supporting salt and a non-aqueous electrolyte solvent; wherein the negative electrode is obtained by pre-forming a SEI coating film on a negative electrode structure which is formed by binding a negative electrode active substance comprising a metal (a). that can be alloyed with lithium, a metal oxide (b) that can absorb and desorb lithium ion and a carbon material (c) that can absorb and desorb lithium ion, to a negative electrode current collector with a negative electrode binder, and wherein the non-aqueous electrolyte solvent contains at least an ionic liquid.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: May 14, 2019
    Assignee: NEC CORPORATION
    Inventors: Kazuaki Matsumoto, Daisuke Kawasaki, Masahiro Suguro, Midori Shimura, Yoko Hashizume
  • Publication number: 20180342769
    Abstract: Provided is a lithium secondary cell which has high capacity, suppresses deterioration in capacity and improves cycle characteristics particularly when used in high-temperature environments and has long lifespan. Provided is a lithium secondary cell including a positive electrode active material layer containing a positive electrode active material, a negative electrode active material layer containing a negative electrode active material and an electrolytic solution for immersing the positive and negative electrode active material layers, wherein the electrolytic solution contains at least one certain ester compound.
    Type: Application
    Filed: July 31, 2018
    Publication date: November 29, 2018
    Applicant: NEC Corporation
    Inventors: Masahiro SUGURO, Midori SHIMURA
  • Publication number: 20170338456
    Abstract: Provided is a lithium ion secondary battery including: a package; and a power generating element disposed in the package, the power generating element including: a positive electrode; a negative electrode; a separator; and an electrolyte solution, and the separator having a shrinkage rate of 10% or less at 150° C. obtained by a thermomechanical analysis.
    Type: Application
    Filed: May 22, 2017
    Publication date: November 23, 2017
    Applicant: Automotive Energy Supply Corporation
    Inventors: Masahiro Suguro, Shinako Kaneko
  • Patent number: 9786952
    Abstract: An object of the present invention is to provide a high-capacity, long-life lithium secondary cell suppressing a reduction in capacity particularly with respect to use under a high-temperature environment, and having improved cycle properties. The lithium secondary cell comprises a positive electrode active material layer containing a positive electrode active material, a negative electrode active material layer containing a silicon-based material as a negative electrode active material, and an electrolytic solution in which the positive electrode active material layer and the negative electrode active material layer are immersed, the electrolytic solution contains one or more of specific cyclic acid anhydrides.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: October 10, 2017
    Assignee: NEC CORPORATION
    Inventors: Masahiro Suguro, Midori Shimura
  • Patent number: 9666904
    Abstract: The present invention relates to a secondary battery, comprising an electrode element in which a positive electrode and a negative electrode are opposed to each other, and an electrolyte solution, wherein the negative electrode active material comprises a metal alloyable with lithium and/or a metal oxide capable of intercalating/deintercalating lithium ions, and the electrolyte solution is a nonaqueous electrolyte solution comprising an electrolyte salt dissolved in a nonaqueous solvent, and comprises a carbonyl compound represented by the following formula (1): wherein two R1s may be the same or different from each other, and each independently represents hydrogen atom, substituted or unsubstituted alkyl group, cycloalkyl group, alkenyl group, alkynyl group, substituted or unsubstituted aromatic group, oxyalkylene group, substituted or unsubstituted alkoxy group, cycloalkyloxy group, alkenyloxy group, alkynyloxy group, substituted or unsubstituted aromatic oxy group, or oxyalkyleneoxy group.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: May 30, 2017
    Assignee: NEC Corporation
    Inventors: Masahiro Suguro, Midori Shimura
  • Patent number: 9543618
    Abstract: An objection is to provide a high performance secondary battery having good flame retardancy and cycle properties. The present exemplary embodiment provides a secondary battery comprising an electrode assembly in which a positive electrode and a negative electrode are arranged to face each other, an electrolyte liquid and a package accommodating the electrode assembly and the electrolyte liquid, wherein the negative electrode is formed by binding a negative electrode active substance comprising a metal (a) capable of being alloyed with lithium, a metal oxide (b) capable of occluding and releasing lithium ions and a carbon material (c) capable of occluding and releasing lithium ions, to a negative electrode current collector, with a negative electrode binder, and the electrolyte liquid comprises a supporting salt and an electrolytic solvent, the electrolytic solvent comprising at least one phosphate ester compound selected from phosphite esters, phosphonate esters and bisphosphonate esters.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: January 10, 2017
    Assignee: NEC CORPORATION
    Inventors: Kazuaki Matsumoto, Daisuke Kawasaki, Masahiro Suguro, Midori Shimura, Yoko Hashizume
  • Patent number: 9466827
    Abstract: An object of the present invention is to provide a secondary battery in which the decomposition of an electrolyte liquid is suppressed and the generation of a gas is reduced, even in the case of using a laminate film as a package.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: October 11, 2016
    Assignee: NEC CORPORATION
    Inventors: Midori Shimura, Daisuke Kawasaki, Masahiro Suguro, Yoko Hashizume, Kazuaki Matsumoto
  • Patent number: 9443661
    Abstract: An object of the present invention is to provide a power storage device with excellent cycle property, employing a cathode containing a nitroxyl polymer. To attain the object in the present invention, in the power storage device employing a cathode comprising a nitroxyl polymer, a lithium or lithium alloy anode is used as an anode active material and the cathode is in direct contact with the anode.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: September 13, 2016
    Assignee: NEC CORPORATION
    Inventors: Kentaro Nakahara, Jiro Iriyama, Shigeyuki Iwasa, Masahiro Suguro, Masaharu Satoh
  • Publication number: 20160248074
    Abstract: Provided is a tab lead for a secondary battery including tab lead metal that has an adhesion interface with sealing resin. The adhesion interface is provided with a surface treatment film formed of a material including a polymer with carboxylic acid anhydride groups. Further provided is a nonaqueous electrolyte secondary battery including the tab lead for the secondary battery as a leading terminal of at least one of a positive electrode and a negative electrode.
    Type: Application
    Filed: February 18, 2016
    Publication date: August 25, 2016
    Applicant: Automotive Energy Supply Corporation
    Inventors: Masahiro SUGURO, Hiromoto TAGUCHI, Yuji TANJO
  • Patent number: 9425480
    Abstract: The object is to provide a secondary battery with higher performance, and especially to provide a secondary battery having low impedance. An exemplary embodiment of the invention is a secondary battery, comprising an electrode assembly in which a positive electrode and a negative electrode are oppositely disposed, an electrolyte liquid, and a package which encloses the electrode assembly and the electrolyte liquid inside; wherein the negative electrode is formed by binding a negative electrode active substance to a negative electrode collector with a negative electrode binder; and wherein the electrolyte liquid comprises a fluorine-containing cyclic ether compound.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: August 23, 2016
    Assignee: NEC CORPORATION
    Inventors: Masahiro Suguro, Daisuke Kawasaki, Midori Shimura, Kazuaki Matsumoto, Yoko Hashizume
  • Patent number: 9299985
    Abstract: Provided is a secondary battery having a good battery property at a high temperature. A secondary battery according to an exemplary embodiment of the invention comprises a negative electrode and an electrolyte liquid; wherein the negative electrode is formed by binding a negative electrode active substance on a negative electrode collector with a negative electrode binder; and wherein the electrolyte liquid comprises a compound (A) having a C?S bond. In this embodiment, the negative electrode active substance is formed by covering at least one of a metal (a) that can be alloyed with lithium and a metal oxide (b) that can absorb and desorb a lithium ion with a carbon material (c). Alternatively, the negative electrode active substance comprises a metal (a) that can be alloyed with lithium and the negative electrode binder negative electrode is a polyimide or a polyamide-imide.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: March 29, 2016
    Assignee: NEC CORPORATION
    Inventors: Yoko Hashizume, Daisuke Kawasaki, Masahiro Suguro, Midori Shimura, Kazuaki Matsumoto
  • Publication number: 20160006010
    Abstract: The present invention relates to a negative electrode for a lithium secondary battery containing a lithium sulfonate represented by a general formula (I) and provides a secondary battery that is excellent in a cycle characteristic and a storage characteristic under a high temperature environment: wherein R represents an n-valent aliphatic hydrocarbon group having 1 to 30 carbon atoms, an n-valent mononuclear aromatic group or an n-valent binuclear condensed aromatic group, and n represents 1 or 2.
    Type: Application
    Filed: January 16, 2014
    Publication date: January 7, 2016
    Applicant: NEC Corporation
    Inventors: Masahiro SUGURO, Midori SHIMURA, Noriyuki TAMURA, Kentaro NAKAHARA
  • Patent number: 9219274
    Abstract: A secondary battery having high capacity and satisfactory high-temperature cycle characteristics is provided. A secondary battery according to the exemplary embodiment has an electrode element in which a positive electrode and a negative electrode are arranged so as to face each other, an electrolytic solution and an outer package packaging the electrode element and the electrolytic solution, wherein the negative electrode is formed by binding a negative electrode active material containing at least one of a metal (a) capable of forming an alloy with lithium and a metal oxide (b) capable of absorbing and releasing lithium ions, to a negative electrode collector, with a polyimide or a polyamide-imide serving as a negative electrode binder; and the electrolytic solution contains a phosphazene compound.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: December 22, 2015
    Assignee: NEC CORPORATION
    Inventors: Daisuke Kawasaki, Masahiro Suguro, Midori Shimura, Kazuaki Matsumoto, Yoko Hashizume
  • Patent number: 9123971
    Abstract: The object of an exemplary embodiment of the invention is to provide a secondary battery with a high performance in which the generation of the swelling can be suppressed and in which the cycle property is excellent. An exemplary embodiment of the invention is a secondary battery, comprising an electrode assembly in which a positive electrode and a negative electrode are oppositely disposed, an electrolyte liquid, and a package which encloses the electrode assembly and the electrolyte liquid inside; wherein the negative electrode is formed by binding a negative electrode active substance, which comprises metal (a) that can be alloyed with lithium, metal oxide (b) that can absorb and desorb lithium ion, and carbon material (c) that can absorb and desorb lithium ion, to a negative electrode collector with at least one selected from polyimides and a polyamide-imides; and wherein the electrolyte liquid comprises a compound represented by any one of predetermined formulae.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: September 1, 2015
    Assignee: NEC CORPORATION
    Inventors: Midori Shimura, Daisuke Kawasaki, Masahiro Suguro, Yoko Hashizume, Kazuaki Matsumoto
  • Publication number: 20150194703
    Abstract: The present invention relates to a secondary battery, comprising an electrode element in which a positive electrode and a negative electrode are opposed to each other, and an electrolyte solution, wherein the negative electrode active material comprises a metal alloyable with lithium and/or a metal oxide capable of intercalating/deintercalating lithium ions, and the electrolyte solution is a nonaqueous electrolyte solution comprising an electrolyte salt dissolved in a nonaqueous solvent, and comprises a carbonyl compound represented by the following formula (1): wherein two R1s may be the same or different from each other, and each independently represents hydrogen atom, substituted or unsubstituted alkyl group, cycloalkyl group, alkenyl group, alkynyl group, substituted or unsubstituted aromatic group, oxyalkylene group, substituted or unsubstituted alkoxy group, cycloalkyloxy group, alkenyloxy group, alkynyloxy group, substituted or unsubstituted aromatic oxy group, or oxyalkyleneoxy group.
    Type: Application
    Filed: June 10, 2013
    Publication date: July 9, 2015
    Applicant: NEC CORPORATION
    Inventors: Masahiro Suguro, Midori Shimura
  • Patent number: 9077045
    Abstract: An object is to provide a higher-performance secondary battery, particularly to provide a secondary battery having a low impedance. The present exemplary embodiment is a secondary battery comprising an electrode assembly in which a positive electrode and a negative electrode are arranged to face each other, an electrolyte liquid, and a package accommodating the electrode assembly and the electrolyte liquid, wherein the negative electrode includes a negative electrode active substance containing at least one selected from a metal (a) capable of being alloyed with lithium, and a metal oxide (b) capable of occluding and releasing lithium ions, a negative electrode binder, and a negative electrode current collector; and the electrolyte liquid contains a sulfide compound.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: July 7, 2015
    Assignee: NEC CORPORATION
    Inventors: Masahiro Suguro, Daisuke Kawasaki, Midori Shimura, Kazuaki Matsumoto, Yoko Hashizume
  • Publication number: 20150118548
    Abstract: Provided is a lithium secondary cell which has high capacity, suppresses deterioration in capacity and improves cycle characteristics particularly when used in high-temperature environments and has long lifespan. Provided is a lithium secondary cell including a positive electrode active material layer containing a positive electrode active material, a negative electrode active material layer containing a negative electrode active material and an electrolytic solution for immersing the positive and negative electrode active material layers, wherein the electrolytic solution contains at least one certain ester compound.
    Type: Application
    Filed: May 28, 2013
    Publication date: April 30, 2015
    Applicant: NEC Corporation
    Inventors: Masahiro Suguro, Midori Shimura
  • Patent number: 8999562
    Abstract: A secondary battery capable of suppressing deterioration of rate characteristics and cycle characteristics even under a high-temperature environment is provided. The secondary battery according to an exemplary embodiment is a secondary battery having an electrode element in which a positive electrode and a negative electrode are arranged so as to face each other, an electrolytic solution and an outer package packaging the electrode element and the electrolytic solution, in which the negative electrode is formed by binding a negative electrode active material to a negative electrode collector, with a negative electrode binder; and the electrolytic solution contains an organic sulfurane compound. The secondary battery electrolytic solution according to the exemplary embodiment contains an organic sulfurane compound.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: April 7, 2015
    Assignee: NEC Corporation
    Inventors: Yoko Hashizume, Daisuke Kawasaki, Masahiro Suguro, Midori Shimura, Kazuaki Matsumoto
  • Publication number: 20150037667
    Abstract: Disclosed is a nonaqueous electrolyte solution containing a nonaqueous solvent, an electrolyte salt dissolved in the nonaqueous solvent, and a conjugated carbonyl compound represented by the following formula (1). A secondary battery using this nonaqueous electrolyte solution shows an excellent cycle characteristic under a high-temperature environment even if a negative electrode active material containing silicon is used. wherein R1 represents R2a or —CO—R2a, R2a having a meaning given to R2, and R2 represents a hydrogen atom, an acyl group, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, a substituted or unsubstituted aromatic group, an oxyalkylene group, an alkoxy group, a cycloalkyloxy group, an alkenyloxy group, an alkynyloxy group, an aromatic oxy group, an oxyalkyleneoxy group or the like.
    Type: Application
    Filed: January 23, 2013
    Publication date: February 5, 2015
    Inventors: Masahiro Suguro, Midori Shimura