Patents by Inventor Makoto Imaji

Makoto Imaji 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).

  • Publication number: 20230422628
    Abstract: To suppress change in a surface resistance value under a high-temperature or high-humidity environment in a transparent conductive piezoelectric film including a transparent piezoelectric film made of a fluororesin. A transparent conductive piezoelectric film includes a transparent piezoelectric film made of a fluororesin, a transparent coating layer, and a transparent electrode stacked in this order. The total thickness of the coating layer is 0.6 to 4.5 ?m. When the transparent conductive piezoelectric film is left to stand in a specific high-temperature environment, the ratio of a resistance value after being left in the environment to a ratio of a resistance value before being left in the environment is 1.30 or less.
    Type: Application
    Filed: October 18, 2021
    Publication date: December 28, 2023
    Applicant: KUREHA CORPORATION
    Inventor: Makoto IMAJI
  • Publication number: 20230397500
    Abstract: Provided is a piezoelectric film capable of sufficiently exhibiting both piezoelectric properties and transparency. A piezoelectric film including, by stacking: a transparent piezoelectric base film made of a fluororesin; and a transparent coating layer having a thickness of 0.20 to 2.5 ?m, wherein the transparent coating layer forms an interface with the transparent piezoelectric base film over an entire region overlapping the transparent piezoelectric base film.
    Type: Application
    Filed: October 18, 2021
    Publication date: December 7, 2023
    Applicant: Kureha Corporation
    Inventors: Makoto IMAJI, Kei YAMAGUCHI, Sho HAYAKAWA
  • Publication number: 20230119647
    Abstract: To provide a piezoelectric film that is less likely to be electrified and that can be safely handled. A multilayered film according to an embodiment of the present invention including: a piezoelectric film containing polyvinylidene fluoride; and a protective film including an antistatic layer, the piezoelectric film and the protective film being bonded.
    Type: Application
    Filed: March 29, 2021
    Publication date: April 20, 2023
    Applicant: Kureha Corporation
    Inventors: Makoto IMAJI, Kei YAMAGUCHI
  • Publication number: 20210242448
    Abstract: Provided is a battery negative electrode material exhibiting both a merit of high specific capacity obtained by using Si, and a merit of high cycle durability obtained by using a non-graphitizable carbon material. Specifically, provided is a negative electrode material (1) of a battery that includes silicon material areas (10) made of a silicon material, and a carbon material area (20) made of a carbon material. The carbon material area (20) is formed in a surrounding area of the silicon material area (10), separated by a cavity (30) at least at a portion. In addition, an (002) average interlayer spacing d002 of the carbon material area (20) determined by powder X-ray diffraction is from 0.365 nm to 0.390 nm.
    Type: Application
    Filed: April 5, 2021
    Publication date: August 5, 2021
    Applicants: Kureha Corporation, Panasonic Corporation
    Inventors: Makoto IMAJI, Yukitaro SAKAKIBARA, Shota KOBAYASHI, Kenichi HOTEHAMA, Daisuke KATOU, Ryohei MIYAMAE
  • Patent number: 10967115
    Abstract: Provided are a toxin separator and the like which are capable of selectively separating toxin present in a biological fluid by binding to protein, from the toxin and the protein. The toxin separator of the present invention also includes activated carbon of which a pore volume of pores having a pore diameter from 1.4 to 35 nm as measured by a nitrogen adsorption method is 0.06 cm3/g or greater.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: April 6, 2021
    Assignee: Kureha Corporation
    Inventors: Makoto Imaji, Kaori Kikuchi, Yoshiharu Itoh
  • Publication number: 20210001034
    Abstract: Provided are a toxin separator and the like which are capable of selectively separating toxin present in a biological fluid by binding to protein, from the toxin and the protein. The toxin separator of the present invention also includes activated carbon of which a pore volume of pores having a pore diameter from 1.4 to 35 nm as measured by a nitrogen adsorption method is 0.06 cm3/g or greater.
    Type: Application
    Filed: January 10, 2019
    Publication date: January 7, 2021
    Applicant: Kureha Corporation
    Inventors: Makoto IMAJI, Kaori KIKUCHI, Yoshiharu ITOH
  • Patent number: 10573891
    Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity, non-dedoping capacity, and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: February 25, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Makoto Imaji, Kenta Aoki, Yasuhiro Tada, Naohiro Sonobe, Junichi Arima, Kenichi Koyakumaru, Hideharu Iwasaki, Kiyoto Otsuka, Jiro Masuko, Hajime Komatsu, Shinya Tago
  • Patent number: 10504635
    Abstract: An object of the present invention is to provide a carbonaceous material for a negative electrode for producing a nonaqueous electrolyte secondary battery capable of rapid charge and discharge and having excellent rate characteristics (output characteristics) while maintaining a large discharge capacity. The problem described above can be solved by a carbonaceous material for a nonaqueous electrolyte secondary battery negative electrode of the present invention obtained by heat-treating a non-graphitizable carbon precursor which is pulverized and contains from 13 to 80 wt. % of a volatile component. With the present invention, it is possible to provide a carbonaceous material for a nonaqueous electrolyte secondary battery negative electrode, whereby a nonaqueous electrolyte secondary battery having a large charge-discharge capacity and having excellent rate characteristics can be produced.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: December 10, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Makoto Imaji, Yasuhiro Tada, Naohiro Sonobe
  • Patent number: 10381637
    Abstract: Provided is a less hygroscopic carbonaceous material that is obtained from a plant-derived carbonaceous raw material and that, when used as a negative electrode material for a nonaqueous electrolyte secondary battery, allows the battery to exhibit good battery characteristics. Provided is a carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries. This carbonaceous material is a particulate carbonaceous material containing carbonaceous particles. The carbonaceous material has a BET specific surface area of 1 m2/g or more and less than 20 m2/g. Each of the carbonaceous particles of the carbonaceous material has a core and a skin covering the core. The core contains a calcined product of a plant-derived carbonaceous raw material. The skin is made of a material that has higher electron emission ability upon irradiation with an electron beam than a material of the core.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: August 13, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Akira Koshima, Taketoshi Okuno, Kenichi Koyakumaru, Hideharu Iwasaki, Kenta Aoki, Makoto Imaji, Yasuhiro Tada, Naohiro Sonobe
  • Publication number: 20190221835
    Abstract: Object: To provide a battery negative electrode material exhibiting both a merit of high specific capacity obtained by using Si, and a merit of high cycle durability obtained by using a non-graphitizable carbon material. Resolution Means: A negative electrode material (1) of a battery of the present invention includes silicon material areas (10) made of a silicon material, and a carbon material area (20) made of a carbon material. The carbon material area (20) is formed in a surrounding area of the silicon material area (10), separated by a cavity (30) at least at a portion. In addition, an (002) average interlayer spacing d002 of the carbon material area (20) determined by powder X-ray diffraction is from 0.365 nm to 0.390 nm.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 18, 2019
    Inventors: Makoto IMAJI, Yukitaro SAKAKIBARA, Shota KOBAYASHI, Kenichi HOTEHAMA, Daisuke KATOU, Ryohei MIYAMAE
  • Publication number: 20180261875
    Abstract: An object of the present invention is to provide a non-aqueous electrolyte secondary battery having high discharge capacity and high charge/discharge efficiency. The aforementioned problem can be resolved by a carbonaceous material for a non-aqueous electrolyte secondary battery negative electrode, using a plant as a carbon source, where potassium element content is 0.10 wt. % or less, true density determined by a pycnometer method using butanol is from 1.35 to 1.50 g/cm3, lithium is electrochemically doped in the carbonaceous material, and in a case where an NMR spectrum of lithium nucleus is measured, a main resonance peak shifted 110 to 160 ppm to a lower magnetic field side is exhibited with regard to a resonance peak of LiCl as a reference substance.
    Type: Application
    Filed: September 21, 2016
    Publication date: September 13, 2018
    Inventors: MAKOTO IMAJI, TATSUYA YAGUCHI, SHOTA KOBAYASHI, YASUHIRO TADA
  • Patent number: 9991517
    Abstract: Provided is a carbonaceous material for a non-aqueous electrolyte secondary battery anode having high discharge capacity per unit volume and excellent storage characteristics. The carbonaceous material for a non-aqueous electrolyte secondary battery anode of the present invention has a true density (?Bt) determined by a pycnometer method using butanol of not less than 1.55 g/cm3 and less than 1.75 g/cm3 and a discharge capacity of an anode at 0.05 V to 1.5 V in terms of a lithium reference electrode standard of not less than 180 mAh/g. Furthermore, the slope 0.9/X (Vg/Ah) of a discharge curve calculated from a discharge capacity X (Ah/g) and a potential difference of 0.9 (V) corresponding to 0.2 V to 1.1 V in terms of a lithium reference electrode standard is not greater than 0.75 (Vg/Ah), and an absorbed moisture quantity after storage for 100 hours in a 25° C. 50% RH air atmosphere is not greater than 1.5 wt %.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: June 5, 2018
    Assignee: KUREHA CORPORATION
    Inventors: Makoto Imaji, Kayoko Okada, Yasuhiro Tada, Naohiro Sonobe, Mayu Komatsu
  • Patent number: 9812711
    Abstract: To provide a carbonaceous material for a non-aqueous electrolyte secondary battery anode that yields an anode for a non-aqueous electrolyte secondary battery having excellent input/output characteristics, and a non-aqueous electrolyte secondary battery having high discharge capacity per unit volume, and a non-aqueous electrolyte secondary battery and a vehicle comprising this non-aqueous electrolyte secondary battery anode. The carbonaceous material for a non-aqueous electrolyte secondary battery anode of the present invention has a number average particle size of from 0.1 to 2.0 ?m, a value of a number average particle size divided by a volume average particle size of not greater than 0.3, an average interlayer spacing d002 of an (002) plane determined by X-ray diffraction of from 0.340 to 0.390 nm, and an atomic ratio (H/C) of hydrogen and carbon of not greater than 0.10.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: November 7, 2017
    Assignee: KUREHA CORPORATION
    Inventors: Makoto Imaji, Kayoko Okada, Yasuhiro Tada, Naohiro Sonobe, Mayu Komatsu
  • Publication number: 20170149062
    Abstract: To provide a carbonaceous material for a non-aqueous electrolyte secondary battery anode that yields an anode for a non-aqueous electrolyte secondary battery having excellent input/output characteristics, and a non-aqueous electrolyte secondary battery having high discharge capacity per unit volume, and a non-aqueous electrolyte secondary battery and a vehicle comprising this non-aqueous electrolyte secondary battery anode. The carbonaceous material for a non-aqueous electrolyte secondary battery anode of the present invention has a number average particle size of from 0.1 to 2.0 ?m, a value of a number average particle size divided by a volume average particle size of not greater than 0.3, an average interlayer spacing d002 of an (002) plane determined by X-ray diffraction of from 0.340 to 0.390 nm, and an atomic ratio (H/C) of hydrogen and carbon of not greater than 0.10.
    Type: Application
    Filed: March 27, 2015
    Publication date: May 25, 2017
    Applicant: KUREHA CORPORATION
    Inventors: MAKOTO IMAJI, KAYOKO OKADA, YASUHIRO TADA, NAOHIRO SONOBE, MAYU KOMATSU
  • Publication number: 20170141394
    Abstract: Provided is a carbonaceous material for a non-aqueous electrolyte secondary battery anode having high discharge capacity per unit volume and excellent storage characteristics. The carbonaceous material for a non-aqueous electrolyte secondary battery anode of the present invention has a true density (?Bt) determined by a pycnometer method using butanol of not less than 1.55 g/cm3 and less than 1.75 g/cm3 and a discharge capacity of an anode at 0.05 V to 1.5 V in terms of a lithium reference electrode standard of not less than 180 mAh/g. Furthermore, the slope 0.9/X (Vg/Ah) of a discharge curve calculated from a discharge capacity X (Ah/g) and a potential difference of 0.9 (V) corresponding to 0.2 V to 1.1 V in terms of a lithium reference electrode standard is not greater than 0.75 (Vg/Ah), and an absorbed moisture quantity after storage for 100 hours in a 25° C. 50% RH air atmosphere is not greater than 1.5 wt %.
    Type: Application
    Filed: March 27, 2015
    Publication date: May 18, 2017
    Inventors: Makoto IMAJI, Kayoko OKADA, Yasuhiro TADA, Naohiro SONOBE, Mayu KOMATSU
  • Publication number: 20170125811
    Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity, non-dedoping capacity, and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.
    Type: Application
    Filed: January 18, 2017
    Publication date: May 4, 2017
    Applicants: KUREHA CORPORATION, KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD.
    Inventors: Makoto IMAJI, Kenta AOKI, Yasuhiro TADA, Naohiro SONOBE, Junichi ARIMA, Kenichi KOYAKUMARU, Hideharu IWASAKI, Kiyoto OTSUKA, Jiro MASUKO, Hajime KOMATSU, Shinya TAGO
  • Publication number: 20160268590
    Abstract: Provided is a less hygroscopic carbonaceous material that is obtained from a plant-derived carbonaceous raw material and that, when used as a negative electrode material for a nonaqueous electrolyte secondary battery, allows the battery to exhibit good battery characteristics. Provided is a carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries. This carbonaceous material is a particulate carbonaceous material containing carbonaceous particles. The carbonaceous material has a BET specific surface area of 1 m2/g or more and less than 20 m2/g. Each of the carbonaceous particles of the carbonaceous material has a core and a skin covering the core. The core contains a calcined product of a plant-derived carbonaceous raw material. The skin is made of a material that has higher electron emission ability upon irradiation with an electron beam than a material of the core.
    Type: Application
    Filed: October 10, 2014
    Publication date: September 15, 2016
    Applicants: KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD., KUREHA CORPORATION
    Inventors: Akira KOSHIMA, Taketoshi OKUNO, Kenichi KOYAKUMARU, Hideharu IWASAKI, Kenta AOKI, Makoto IMAJI, Yasuhiro TADA, Naohiro SONOBE
  • Publication number: 20150340693
    Abstract: An object of the present invention is to provide a carbonaceous material for a negative electrode for producing a nonaqueous electrolyte secondary battery capable of rapid charge and discharge and having excellent rate characteristics (output characteristics) while maintaining a large discharge capacity. The problem described above can be solved by a carbonaceous material for a nonaqueous electrolyte secondary battery negative electrode of the present invention obtained by heat-treating a non-graphitizable carbon precursor which is pulverized and contains from 13 to 80 wt. % of a volatile component. With the present invention, it is possible to provide a carbonaceous material for a nonaqueous electrolyte secondary battery negative electrode, whereby a nonaqueous electrolyte secondary battery having a large charge-discharge capacity and having excellent rate characteristics can be produced.
    Type: Application
    Filed: February 19, 2014
    Publication date: November 26, 2015
    Inventors: Makoto Imaji, Yasuhiro Tada, Naohiro Sonobe
  • Publication number: 20150263347
    Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity (discharge capacity), non-dedoping capacity (irreversible capacity), and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor (i.e. non-graphitizable carbon precursor, graphitizable carbon, or mixture thereof) or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.
    Type: Application
    Filed: August 30, 2013
    Publication date: September 17, 2015
    Applicants: KUREHA CORPORATION, KURARAY CHEMICAL CO., LTD., KURARAY CO., LTD.
    Inventors: Makoto Imaji, Kenta Aoki, Yasuhiro Tada, Naohiro Sonobe, Junichi Arima, Kenichi Koyakumaru, Hideharu Iwasaki, Kiyoto Otsuka, Jiro Masuko, Hajime Komatsu, Shinya Tago
  • Publication number: 20150188137
    Abstract: The object of the present invention is to provide a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery which uses a plant-derived organic material as a raw material, has high purity so that alkali metals such as the potassium element and alkali earth metals such as the calcium element are sufficiently removed by de-mineral treatment, and has excellent discharge capacity and efficiency, a novel manufacturing method capable of efficiently mass-producing the carbonaceous material, and a lithium ion secondary battery using the carbonaceous material. The problem described above can be solved by a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery obtained by carbonizing a plant-derived organic material, the atom ratio (H/C) of hydrogen atoms and carbon atoms according to elemental analysis being at most 0.
    Type: Application
    Filed: August 30, 2013
    Publication date: July 2, 2015
    Inventors: Mayu Komatsu, Yasushi Ebihara, Takashi Wakahoi, Yasuhiro Tada, Naohiro Sonobe, Mao Suzuki, Kayoko Okada, Akitoshi Hatamochi, Makoto Imaji, Yasufumi Ikeyama, Shota Kobayashi