公开(公告)号：US20180269467A1

公开(公告)日：2018-09-20

申请号：US15532879

申请日：2015-12-04

Applicant: Denka Company Limited

Inventor： Takashi SONODA ,  Hisataka TAGAMI ,  Yuki NAKO ,  Hiroshi YOKOTA

IPC: H01M4/131 ,  H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/623 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: By using a conductive composition for an electrode comprising a carbon black wherein the localized electron spin density per unit mass at 23° C. is 18.0×1016/m2 or less and the BET specific surface area is 30 m2/g or more and 120 m2/g or less, an active material which can intercalate and deintercalate a cation, and a binder, high durability is realized while the output properties of cells are maintained.

公开(公告)号：US20190248944A1

公开(公告)日：2019-08-15

申请号：US16320646

申请日：2017-07-14

Applicant: Denka Company Limited

Inventor： Tatsuya NAGAI ,  Takuya NARUTOMI ,  Tetsuya ITO ,  Hiroshi YOKOTA

IPC: C08F261/04 ,  H01M4/62 ,  H01M4/505 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/0525 ,  C08L27/16 ,  C08K3/04 ,  C08F20/44

CPC classification number: C08F261/04 ,  C08F20/44 ,  C08K3/04 ,  C08K2201/001 ,  C08L27/16 ,  C08L2203/20 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/62 ,  H01M4/623 ,  H01M4/625 ,  H01M10/0525

Abstract: [Problem]To provide a conductive resin composition for electrodes which is excellent in dispersibility and oxidation resistance. To provide: an electrode composition employing the conductive resin composition for electrodes and having a low viscosity; an electrode employing the electrode composition and having a low electrode plate resistance; and a lithium ion battery having a high energy density, high output characteristics and a high cyclability.[Solution]A conductive resin composition for electrodes, comprising a dispersant, a conductive agent, and a binding material, wherein: the dispersant comprises a graft copolymer in which a monomer containing acrylonitrile as a main component is grafted onto polyvinyl alcohol; the average degree of polymerization of the polyvinyl alcohol is 300 to 3,000 and the degree of saponification of the same is 90 mol % to 100 mol %; and the polyvinyl alcohol content and the polyacrylonitrile content in the graft copolymer are, respectively, 10 mass % to 40 mass % and 90 mass % to 60 mass %.

公开(公告)号：US20190198879A1

公开(公告)日：2019-06-27

申请号：US16330657

申请日：2017-07-03

Applicant: DENKA COMPANY LIMITED

Inventor： Tatsuya NAGAI ,  Yoko HORIKOSHI ,  Hitoshi KANEKO ,  Hiroshi YOKOTA

IPC: H01M4/62 ,  H01M4/66

CPC classification number: H01M4/625 ,  B82B1/00 ,  C01B32/158 ,  H01M4/13 ,  H01M4/131 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/62 ,  H01M4/66 ,  H01M4/661 ,  H01M2004/028

Abstract: Provided is a conductive composition for electrodes, the conductive composition having excellent electrical conductivity and dispersibility. Also provided are: a positive electrode for non-aqueous batteries, the positive electrode using the conductive composition and having low electrode plate resistance and excellent binding properties; and a non-aqueous battery having high energy density, high output characteristics, and high cycle characteristics. The conductive composition for electrodes contains a conductive material, an active material, a binder, and a dispersant, wherein the conductive material contains carbon black and a multi-walled carbon nanotube having a powder resistivity of 0.035 Ω⋅cm or less as measured under a load of 9.8 MPa, and a median volumetric diameter D50 value, which is as a measure of dispersibility, in the range of 0.3-8 μm The positive electrode which is for non-aqueous batteries and has low electrode plate resistance and excellent binding properties; and the non-aqueous battery having high output characteristics and high cycle characteristics are obtained by using the conductive composition in which the content of the multi-walled carbon nanotube in the conductive material is 3-50 mass %.

公开(公告)号：US20160372740A1

公开(公告)日：2016-12-22

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 ,  Taroh INADA ,  Hiroshi YOKOTA ,  Takashi KAWASAKI

IPC: H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/62

CPC classification number: H01M4/364 ,  H01M4/131 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028

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.

Abstract translation: 本发明的目的是提供一种正极混合物，其能够以较少量的气体进行稳定的充放电，其具有基于锂的工作电压或不小于4.5V的初始晶体相变电压 。 本发明涉及包含炭黑的正极混合物，其堆积密度不大于0.1g / cm 3，微晶尺寸为10至40，碘吸附为1至150mg / g，挥发物含量不为 大于0.1％，金属杂质含量为20ppm以下，以锂为基准的工作电压或初期晶体相变电压为4.5V以上的正极活性物质。