公开(公告)号：US20190280299A1

公开(公告)日：2019-09-12

申请号：US16463789

申请日：2017-11-20

Applicant: Tokyo University of Science Foundation

Inventor： Shinichi KOMABA ,  Kei KUBOTA ,  Kuniko CHIHARA ,  Akihiro KATOGI

IPC: H01M4/58 ,  H01M10/054 ,  C01G31/00

Abstract: Provided is the positive electrode active material for a potassium ion battery according to the embodiment comprises a compound represented by Formula (1), in which M represents at least one element selected from the group consisting of V, Fe, Co, Ni, and Mn, and x represents a number from 0 to 1; and is a positive electrode for a potassium ion battery comprising the positive electrode active material for a potassium ion battery according to the embodiment, or a potassium ion battery comprising the positive electrode for a potassium ion battery. KMOxPO4F1-x  [Formula (1)]

公开(公告)号：US20230124539A1

公开(公告)日：2023-04-20

申请号：US17909497

申请日：2021-02-25

Applicant: Tokyo University of Science Foundation ,  TOSOH CORPORATION

Inventor： Tatsuo HORIBA ,  Kei KUBOTA ,  Yoshinari ABE ,  Asako OISHI ,  Shinichi KOMABA ,  Hiroshi INOUE ,  Eiichi TOUGOU

IPC: H01M4/62 ,  C08B37/00 ,  C08B11/12

Abstract: The present invention provides a binder for positive electrode of lithium ion battery which is excellent in workability at the time of producing a positive electrode, is excellent in charge and discharge characteristics such as cycle characteristics and rate characteristics, and enables to possible to produce a positive electrode having an extended cycle life, as well as the present invention provides a slurry for forming positive electrode mixture layer of lithium ion battery, a positive electrode for lithium ion battery, and a lithium ion battery, using the same. As a binder for binding a positive electrode active material, a conductive aid and a current collector at a positive electrode of a lithium ion battery, by using one containing a polysaccharide introduced with at least one ion exchange group selected from the group consisting of sulfate groups and alkali metal sulfate groups, it is possible to provide a lithium ion battery with excellent charge and discharge characteristics and an extended cycle life.

公开(公告)号：US20180166686A1

公开(公告)日：2018-06-14

申请号：US15575462

申请日：2016-05-20

Applicant: Umicore ,  Tokyo University of Science Foundation

Inventor： Shinichi KUMAKURA ,  Shinichi KOMABA ,  Kei KUBOTA ,  Yoshiyuki TAHARA

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/054 ,  H01M10/058 ,  C01G45/12 ,  C01G53/00

Abstract: A sodium transition metal based cathode material for a rechargeable sodium battery, having a P2 orthorhombic layered bronze crystal structure with space group Cmcm, and having a composition NaxMyMn1-yLiy′AzO2 with 0.60 0.

公开(公告)号：US20170294676A1

公开(公告)日：2017-10-12

申请号：US15518104

申请日：2015-09-03

Applicant: TOKYO UNIVERSITY OF SCIENCE FOUNDATION

Inventor： Shinichi KOMABA ,  Kei KUBOTA ,  Mouad DAHBI ,  Tetsuya HASEGAWA

IPC: H01M10/054 ,  H01G11/68 ,  H01M4/62 ,  H01G11/30 ,  H01M4/587 ,  H01M4/66

Abstract: Provided are: a potassium ion secondary battery which is not susceptible to deterioration of charge/discharge capacity even if charging and discharging are repeated, and which has a long service life as a secondary battery; a potassium ion capacitor; a negative electrode for the potassium ion secondary battery; and a negative electrode for the potassium ion capacitor. A negative electrode for potassium ion secondary batteries and a negative electrode for potassium ion capacitors, each of which contains a carbon material that is capable of absorbing and desorbing potassium and a binder that contains a polycarboxylic acid and/or a salt thereof. A potassium ion secondary battery which is provided with the negative electrode or the capacitor. A binder for negative electrodes of potassium ion secondary batteries or negative electrodes of potassium ion capacitors, which contains a polycarboxylic acid and/or a salt thereof.