Patents by Inventor Kentaro Nakahara

Kentaro Nakahara 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: 8895849
    Abstract: A photoelectric conversion element is provided which includes a semiconductor electrode (108) containing a semiconductor layer (103) and a dye, a counter electrode (109), and an electrolyte layer (104) disposed between the semiconductor electrode (108) and the counter electrode (109) and in which the dye contains a compound expressed by General Formula 1. (where A in General Formula 1 represents a substituted or unsubstituted aromatic group and may contain one or more atoms of oxygen, nitrogen, sulfur, silicon, phosphorus, boron, or halogen and the aromatic group may be obtained by condensing a plurality of aromatic groups).
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: November 25, 2014
    Assignee: NEC Corporation
    Inventors: Kentaro Nakahara, Kenji Kobayashi, Masahiro Suguro, Shin Nakamura
  • Patent number: 8728662
    Abstract: Disclosed is a polyradical compound which can be used as an electrode active material for at least one of a positive electrode and a negative electrode. The polyradical compound has a repeating unit represented by general formula (1) and is crosslinked using a bifunctional crosslinking agent having two polymerizing groups in the molecule represented by general formula (2), wherein R1 to R3 each independently represent hydrogen or methyl group; R4 to R7 each independently represent C1 to C3 alkyl group; X represents single bond, linear, branched or cyclic C1 to C15 alkylenedioxy group, alkylene group, phenylenedioxy group, phenylene group or structure represented by general formula (3); and R8 to R13 each independently represent hydrogen or methyl group, and k represents an integer of 2 to 5.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: May 20, 2014
    Assignee: NEC Corporation
    Inventors: Masahiro Suguro, Shigeyuki Iwasa, Yuki Kusachi, Jiro Iriyama, Yukiko Morioka, Kentaro Nakahara, Sadahiko Miura
  • Publication number: 20140087235
    Abstract: A layered structure includes a configuration in which non-aqueous secondary batteries are layered. Each non-aqueous secondary battery includes: a positive-electrode collector layer; a positive-electrode layer formed on one surface of the positive-electrode collector layer; a negative-electrode collector layer; a negative-electrode layer formed on one surface of the negative-electrode collector layer so as to be opposed to the positive-electrode layer; a separator containing an electrolytic solution provided between the positive-electrode layer and the negative-electrode layer; a positive-electrode-side insulating layer formed on another surface of the positive-electrode collector layer; and a negative-electrode-side insulating layer formed on another surface of the negative-electrode collector layer. Two non-aqueous secondary batteries share one negative-electrode-side insulating layer.
    Type: Application
    Filed: May 10, 2012
    Publication date: March 27, 2014
    Inventors: Hiroshi Kajitani, Kentaro Nakahara, Takanori Nishi, Shigeyuki Iwasa, Hiroshi Kato, Yoichi Shimizu, Haruyuki Yoshigahara
  • Publication number: 20140079984
    Abstract: A non-aqueous secondary battery includes: a positive-electrode collector layer; a positive-electrode layer formed on one surface of the positive-electrode collector layer; a negative-electrode collector layer; a negative-electrode layer formed on one surface of the negative-electrode collector layer so as to be opposed to the positive-electrode layer; a separator provided between the positive-electrode layer and the negative-electrode layer; and a positive-electrode-side insulating layer and a negative-electrode-side insulating layer respectively formed on another surface of the positive-electrode collector layer and another surface of the negative-electrode collector layer. Circumferential inner surfaces of peripheral edges of the positive-electrode collector layer and the negative-electrode collector layer are joined with a sealing agent including at least a positive-electrode fusion layer, a gas barrier layer, and a negative-electrode fusion layer.
    Type: Application
    Filed: May 10, 2012
    Publication date: March 20, 2014
    Inventors: Hiroshi Kajitani, Kentaro Nakahara, Takanori Nishi, Shigeyuki Iwasa, Haruyuki Yoshigahara, Yoichi Shimizu
  • Publication number: 20140061532
    Abstract: The present invention provides a radical composition capable of suppressing elution of electrode components in an electrolyte solution when used in an electrode for a secondary battery, and a battery using the radical composition. The present invention relates to a radical composition including a pyrroline nitroxide polymer and polyethylene glycols.
    Type: Application
    Filed: March 23, 2012
    Publication date: March 6, 2014
    Applicants: WASEDA UNIVERSITY, NEC CORPORATION, SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Sosuke Yamaguchi, Nobutaka Fujimoto, Yuji Kinpara, Shun Hashimoto, Shigeyuki Iwasa, Kentaro Nakahara
  • Publication number: 20140057167
    Abstract: A secondary battery using a polymer radical material and a conducting additive in which the performance of a conductive auxiliary layer is further improved and the internal resistance is reduced, thereby achieving a higher output. Specifically disclosed is a secondary battery in which at least one of a positive electrode and a negative electrode uses, as an electrode active material, a polymer radical material and a conducting additive having electrical conductivity. By providing a conductive auxiliary layer between a current collector and the polymer radical material/conducting additive electrode which is mainly composed of graphite, fibrous carbon or a granular carbon having a DBP absorption of not more than 110 cm3/100 g, the secondary battery with a higher output can be obtained.
    Type: Application
    Filed: October 31, 2013
    Publication date: February 27, 2014
    Applicants: NEC CORPORATION, DIC CORPORATION
    Inventors: Masanori KASAI, Hiroshi Isozumi, Takayoshi Obata, Shigeyuki Iwasa, Kentaro Nakahara, Masahiro Suguro
  • Publication number: 20140038036
    Abstract: In a secondary battery utilizing redox by a radical site, charge-discharge is carried out in such a manner that a lithium ion moves between a positive electrode and a negative electrode (rocking chair-type). An anion in an amount necessary for electrode doping during charge-discharge is made unnecessary, thereby reducing the amount of an electrolytic solution. A secondary battery with a large energy density is achieved. Provided is an electrode active material including at least one polymer including a radical site capable of being converted into a first cation, and an anion site capable of being bonded with the first cation or a second cation.
    Type: Application
    Filed: January 23, 2012
    Publication date: February 6, 2014
    Applicants: WASEDA UNIVERSITY, NEC CORPORATION
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Hiroki Yakushiji, Shigeyuki Iwasa, Kentaro Nakahara
  • Patent number: 8617744
    Abstract: There can be provided an energy storage device comprising a positive electrode comprising a nitroxyl compound having a nitroxyl cation partial structure in an oxidized state and having a nitroxyl radical partial structure in a reduced state; a negative electrode comprising a carbon material which lithium ions can be reversibly intercalated into and deintercalated from; and an electrolytic solution comprising a lithium salt and an aprotic organic solvent, wherein the negative electrode is a negative electrode comprising the carbon material which lithium ions are previously intercalated into, apart from lithium ions associated with a capacity A of lithium capable of being intercalated and deintercalated in charge and discharge, thereby allowing the energy storage device to simultaneously achieve high energy density, high output characteristics, low environmental load, and high stability in charge and discharge cycles.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: December 31, 2013
    Assignee: NEC Corporation
    Inventors: Kentaro Nakahara, Shigeyuki Iwasa, Masahiro Suguro, Kazuaki Matsumoto, Kaichiro Nakano
  • Publication number: 20130319530
    Abstract: The present invention provides a compound useful as a photoelectric conversion dye having excellent photoelectric conversion performance. The compound according to the present invention is a thiazole-based compound represented by the following general formula (1), a tautomer or stereoisomer thereof, or a salt thereof. In the general formula (1), R1 represents a hydrogen atom, a substituted or unsubstituted, linear or branched alkyl group, or a substituted or unsubstituted aryl group, R2 represents a hydrogen atom, a substituted or unsubstituted, linear or branched alkyl group, or a cyano group, D represents an organic group comprising an electron-donating substituent, Z represents a linking group having a heteroaromatic ring or at least one hydrocarbon group selected from the group consisting of an aromatic ring, a vinylene group (—CH?CH—), or an ethynylene group (—C?C—), and M represents a hydrogen atom or a salt-forming cation.
    Type: Application
    Filed: February 13, 2012
    Publication date: December 5, 2013
    Applicant: NEC CORPORATION
    Inventors: Katsumi Maeda, Shin Nakamura, Kentaro Nakahara, Terumasa Shimoyama
  • Publication number: 20130209878
    Abstract: A thin nonaqueous secondary cell has high stability where a positive charge collector and a negative charge collector also serve as outer covering members. A sealing layer concurrently achieves high adhesiveness with both electrode charge collectors, high reliability preventing of short circuits, and satisfactory gas barrier properties. The nonaqueous secondary cell includes a positive charge collector containing aluminum as a primary component, a positive electrode layer formed on the positive charge collector, a negative charge collector containing copper as a primary component, a negative electrode layer formed on the negative charge collector so the negative electrode layer opposes the positive electrode layer, and a separator including an electrolyte between positive and negative electrode layers.
    Type: Application
    Filed: August 12, 2011
    Publication date: August 15, 2013
    Applicant: NEC CORPORATION
    Inventors: Kentaro Nakahara, Osamu Yamashita, Takanori Nishi, Haruyuki Yoshigahara, Yoichi Shimizu
  • Publication number: 20130167932
    Abstract: Provided is an indole compound represented by the following general formula (1): wherein in formula (1), R1 and R2 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R3 to R6 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an alkoxy group or a hydroxy group; X represents an organic group having an acidic group; and Z represents a linking group including at least one selected from the group consisting of a substituted or unsubstituted aromatic ring, a substituted or unsubstituted heterocyclic ring, a vinylene group and an ethynylene group.
    Type: Application
    Filed: November 7, 2011
    Publication date: July 4, 2013
    Applicant: NEC CORPORATION
    Inventors: Katsumi Maeda, Shin Nakamura, Kentaro Nakahara, Terumasa Shimoyama
  • Publication number: 20130118570
    Abstract: Provided is a dye for photoelectric conversion containing at least one or more kind of a compound represented by the following General Formula (1) (in Formula (1), R1 and R2 represent any one of —CN, —SO2R, —COOR, and —CONR2 (R represents a hydrogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, or an aryl group); R3 represents a direct bond or a substituted or unsubstituted alkylene group; X represents an acidic group; and D represents an organic group having an electron donating substituent or a substituted or unsubstituted heterocyclic group).
    Type: Application
    Filed: November 18, 2010
    Publication date: May 16, 2013
    Applicant: NEC CORPORATION
    Inventors: Katsumi Maeda, Shin Nakamura, Kentaro Nakahara
  • Patent number: 8402332
    Abstract: Disclosed herein is a reception apparatus, including an acquisition section adapted to receive a signal which includes at least one of a first signal and a second signal which have different structures from each other except that the first and second signals have a preamble signal and acquire the preamble signal from the received signal; a detection section adapted to detect a value for correcting the signal using the signal; and a correction section adapted to correct, if it is decided based on the preamble signal acquired by the acquisition section that the signal is the first signal, the signal using the value detected by the detection section.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: March 19, 2013
    Assignee: Sony Corporation
    Inventors: Yuken Goto, Kenichi Kobayashi, Kentaro Nakahara
  • Publication number: 20130056690
    Abstract: It is an object to provide a maleimide-based compound having excellent photoelectric conversion characteristics, and a tautomer or a stereoisomer thereof, a dye for photoelectric conversion, a semiconductor electrode, a photoelectric conversion element, and a photoelectrochemical cell. In order to accomplish the above-described objects, a dye for photoelectric conversion including at least one compound represented by the following general formula (1) is provided. (In the formula (1), R1 represents a direct bond, or a substituted or unsubstituted alkylene group. X represents an acidic group. D represents an organic group containing an electron-donating substituent. Z represents a linking group that has at least one hydrocarbon group selected from aromatic rings or heterocyclic rings).
    Type: Application
    Filed: May 16, 2011
    Publication date: March 7, 2013
    Applicant: NEC CORPORATION
    Inventors: Katsumi Maeda, Shin Nakamura, Kentaro Nakahara
  • Patent number: 8385480
    Abstract: Disclosed herein is a receiving apparatus including a first correlation value computation section, an operation section, a second correlation value computation section, a decoding section, and a determination section.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: February 26, 2013
    Assignee: Sony Corporation
    Inventors: Yuken Goto, Naoto Nagaki, Satoshi Okada, Kentaro Nakahara, Koji Naniwada
  • Publication number: 20130008510
    Abstract: An object of the present invention is to provide a photoelectric conversion element having excellent photoelectric conversion efficiency and durability. To achieve the object, the present invention provides a photoelectric conversion element including a semiconductor electrode (70) that has a porous semiconductor layer (30) onto which a dye (40) is adsorbed, a counter electrode (60) that is provided so as to face the semiconductor layer (30) of the semiconductor electrode (70), and an electrolyte (50) that contains a radical compound having an average molecular weight of 200 or more and is positioned between the semiconductor electrode (70) and the counter electrode (60).
    Type: Application
    Filed: March 22, 2011
    Publication date: January 10, 2013
    Applicant: NEC Corporation
    Inventors: Shin Nakamura, Katsumi Maeda, Kentaro Nakahara, Masahiro Suguro
  • Patent number: 8242213
    Abstract: In the present invention, in order to provide an electrode active material that has a high capacity density and from which a large current can be extracted and to provide a battery that has a high energy density and produces a large output, in a battery comprising at least a cathode, an anode and an electrolyte, a polyradical compound having a partial structure represented by the following general formula (2) is used as an electrode active material for at least one of the cathode and the anode, wherein, in the formula (2), R1 to R3 independently represent a hydrogen atom or a methyl group; and R4 to R7 independently represent an alkyl group having 1 to 3 carbon atoms.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: August 14, 2012
    Assignee: NEC Corporation
    Inventors: Masahiro Suguro, Shigeyuki Iwasa, Jirou Iriyama, Kentaro Nakahara, Masaharu Satou
  • Publication number: 20120171542
    Abstract: A secondary battery including: a positive electrode which comprises an oxide which absorbs and releases lithium ions; a negative electrode which comprises a material which absorbs and releases the lithium ions; and a first electrolyte solution which transports charge carriers between the positive electrode and the negative electrode; wherein the positive electrode comprises a compound, which is represented by the composition formula LiaM1bOd or LiaM1bM2cOd, and the positive electrode is formed by electrically combining lithium metal and a lithium-containing transition metal oxide in a second electrolyte solution which includes lithium ions. In the formulae, a, b, c and d represent a composition ratio of the above composition formulae, and are numbers in ranges of: 1.2?a?2, 0<b, c?2, and 2?d?4, M1 and M2 in the above formulae represent any one kind of elements selected from the group consisting of Co, Ni, Mn, Fe, Al, Sn, Mg, Ge, Si and P, and M1 and M2 are different from each other.
    Type: Application
    Filed: August 30, 2010
    Publication date: July 5, 2012
    Applicant: NEC Corporation
    Inventors: Kazuaki Matsumoto, Kentaro Nakahara, Kaichiro Nakano
  • Publication number: 20120171561
    Abstract: The object of the present invention is to provide an electrode material which enables the production of an electricity storage device that has a large discharge capacity, and suffers minimal voltage drop due to resistance even when discharge is performed at a large electric current; a method for producing the electrode material; and an electricity storage device that exhibits both high energy density and high output characteristics, and an electricity storage device is produced which uses, as an electrode, a polymer radical material-activated carbon-conductive material composite, prepared by adding dropwise, or pouring, a raw material solution, in which a polymer radical material having a radical partial structure in a reduced state is dissolved or swollen and an activated carbon and a conductive material are dispersed or dissolved, into a solution in which the polymer radical material, the activated carbon and the conductive material do not dissolve or swell, thus obtaining a precipitate containing the polym
    Type: Application
    Filed: August 16, 2010
    Publication date: July 5, 2012
    Applicant: NEC CORPORATION
    Inventors: Shigeyuki Iwasa, Kentaro Nakahara, Masahiro Suguro, Motoharu Yasui
  • Publication number: 20120100437
    Abstract: There can be provided an energy storage device comprising a positive electrode comprising a nitroxyl compound having a nitroxyl cation partial structure in an oxidized state and having a nitroxyl radical partial structure in a reduced state; a negative electrode comprising a carbon material which lithium ions can be reversibly intercalated into and deintercalated from; and an electrolytic solution comprising a lithium salt and an aprotic organic solvent, wherein the negative electrode is a negative electrode comprising the carbon material which lithium ions are previously intercalated into, apart from lithium ions associated with a capacity A of lithium capable of being intercalated and deintercalated in charge and discharge, thereby allowing the energy storage device to simultaneously achieve high energy density, high output characteristics, low environmental load, and high stability in charge and discharge cycles.
    Type: Application
    Filed: May 26, 2010
    Publication date: April 26, 2012
    Applicant: NEC CORPORATION
    Inventors: Kentaro Nakahara, Shigeyuki Iwasa, Masahiro Suguro, Kazuaki Matsumoto, Kaichiro Nakano