公开(公告)号：US10193141B2

公开(公告)日：2019-01-29

申请号：US15121110

申请日：2015-02-24

Applicant: TODA KOGYO CORP. ,  DENKA COMPANY LIMITED

Inventor： Akihisa Kajiyama ,  Teruaki Santoki ,  Daisuke Morita ,  Ryuta Masaki ,  Takahiko Sugihara ,  Tsuyoshi Wakiyama ,  Kazutoshi Matsumoto ,  Akira Yoda ,  Taro Inada ,  Hiroshi Yokota ,  Takashi Kawasaki

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/131 ,  H01M4/136 ,  H01M4/58 ,  H01M10/052 ,  H01M4/02

Abstract: An object of the present invention is to provide a positive electrode mixture capable of conducting stable charging and discharging with a less amount of gasses generated which has an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium. The present invention relates to a positive electrode mixture comprising carbon black having a bulk density of not more than 0.1 g/cm3, a crystallite size of 10 to 40 Å, an iodine adsorption of 1 to 150 mg/g, a volatile content of not more than 0.1% and a metal impurity content of not more than 20 ppm, and a positive electrode active substance having an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium.

公开(公告)号：US11637290B2

公开(公告)日：2023-04-25

申请号：US17605814

申请日：2020-04-17

Applicant: DENKA COMPANY LIMITED

Inventor： Akira Yoda ,  Tatsuya Nagai ,  Tetsuya Ito

IPC: C09C1/48 ,  H01M4/62 ,  C09C1/56 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: A slurry including at least a carbon black and a dispersion medium, wherein a concentration of the carbon black in the slurry is 5% by mass or more and 25% by mass or less, and wherein in a volume-based frequency distribution of particle size of the carbon black measured by a laser diffraction/scattering method, provided that a volume concentration of carbon black with a particle size of 0.6 μm or more is x (%), a volume concentration of carbon black with a particle size of 0.3 μm or more and less than 0.6 μm is y (%), and a volume concentration of carbon black having a particle size of less than 0.3 μm is 100−(x+y) (%), the slurry satisfies 10≤x≤70, 30≤y≤90, and 0≤100−(x+y)≤30.