公开(公告)号：US20180254475A1

公开(公告)日：2018-09-06

申请号：US15756399

申请日：2016-09-14

Applicant: OSAKA SODA CO., LTD.

Inventor： Kazuhiro TAKAHASHI ,  Miwa NAKAMURA ,  Takashi MATSUO ,  Hideaki UEDA

IPC: H01M4/1391 ,  H01M10/052 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/62

CPC classification number: H01M4/1391 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/62 ,  H01M4/621 ,  H01M4/622 ,  H01M10/052 ,  H01M2220/30 ,  Y02E60/122 ,  Y02T10/7011

Abstract: There is provided a cathode material that can effectively reduce the internal resistance of a nonaqueous electrolyte secondary battery, and effectively improve the charge-discharge cycle characteristics of the nonaqueous electrolyte secondary battery. The cathode material is a cathode material for a nonaqueous electrolyte secondary battery comprising a cathode active material, a binder, and a water-soluble antioxidant.

公开(公告)号：US20180254515A1

公开(公告)日：2018-09-06

申请号：US15756506

申请日：2016-09-14

Applicant: OSAKA SODA CO., LTD.

Inventor： Kazuhiro TAKAHASHI ,  Miwa NAKAMURA ,  Takashi MATSUO ,  Hideaki UEDA

IPC: H01M10/0525 ,  H01M4/62 ,  H01M4/133 ,  H01M4/134 ,  H01M4/66 ,  H01M4/04

CPC classification number: H01M10/0525 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/622 ,  H01M4/661 ,  H01M10/0566 ,  H01M2004/027 ,  H01M2004/028 ,  Y02E60/122 ,  Y02T10/7011

Abstract: There is provided a cathode material for a nonaqueous electrolyte secondary battery that has excellent flexibility and binding properties, and can effectively reduce the internal resistance of a nonaqueous electrolyte secondary battery, and effectively improve the charge-discharge cycle characteristics of the nonaqueous electrolyte secondary battery. The cathode material comprises a cathode active material and a binder, wherein the binder is a copolymer comprising a structural unit (A) derived from a (meth)acrylate monomer, a structural unit (B) derived from a carboxylic acid group-containing ethylenically unsaturated monomer, and a structural unit (C) derived from a polyfunctional (meth)acrylate monomer having a functionality of 5 or less, and the cathode material is substantially free of a thickener.

公开(公告)号：US20180366731A1

公开(公告)日：2018-12-20

申请号：US15781333

申请日：2016-12-21

Applicant: Osaka Soda Co., Ltd.

Inventor： Kazuhiro TAKAHASHI ,  Yoshihiro MOROOKA ,  Takashi MATSUO ,  Hideaki UEDA

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/36 ,  C08F265/06

Abstract: Provided is a binder for a battery electrode, the binder having superior binding properties and being capable of effectively decreasing the internal resistance of a battery while still being usable as an aqueous binder with low environmental burden. A binder for a battery electrode according to the present invention has a core shell structure of a core section (A) containing a copolymer the principal constituent of which is methyl methacrylate and a shell section (B) having a (meth)acrylate-based copolymer containing (meth)acrylate as a polymerization component, wherein the swelling ratios with respect to a mixed solvent in which ethylene carbonate and diethyl carbonate are mixed at a volume ratio of 3:7 are 10% or less for the resin constituting the core section (A) and 30% or more for the resin constituting the shell section (B).