Fujifilm Wako Pure Chemical Corporation

Kazuki Takimoto

Kuniaki Okamoto

Hironori Mizuta

Nobutaka Shimamura

Takatoshi Matsuura

Hiromi Watahiki

Masahiro Takano

Kei Kawano

Tomoyuki Mori

Kaho Mori

Kaho Sugimoto

An object of the present invention is to provide a binder which exhibits excellent dispersibility of a conductive assistant; a slurry composition and an electrode, each of which uses this binder; and an electricity storage device which is provided with this electrode. The present invention relates to a binder for an electricity storage device, in which a loss tangent tan &#x3b4; in a linear region of an aqueous dispersion liquid of 0.5% by mass of the binder and 4.6% by mass of a conductive assistant satisfies tan &#x3b4;&#x3e;1 in a strain dispersion measurement under measurement conditions of a measurement temperature of 25&#xb0; C. and a frequency of 1 Hz, and the conductive assistant is an acetylene black having an average particle diameter of 30 nm or more and 40 nm or less and a specific surface area of 65 m/g or more and 70 m/g or less; a slurry composition and an electrode, each of which uses this binder; an electricity storage device which is provided with this electrode; and the like.

Binder for electricity storage devices improving dispersibility of conductive assistant

An object of the present invention is to provide an excellent binder agent composition solving problems such as the decrease in a charge/discharge capacity that occurs in a case where a silicon-containing active material is used, a slurry composition and an electrode in which the binder agent composition is used, and a method for preparing the electrode. The present invention relates to 'a binder agent composition containing (A) one or more kinds of polymers containing polyacrylic acid, (B) a bivalent to decavalent alcohol, and (C) water', 'a slurry composition for lithium batteries, containing 1) a silicon-containing active material, 2) a conductive assistant, and 3) the binder agent composition', &#x201c;an electrode for lithium batteries that has 1) a silicon-containing active material, 2) a conductive assistant, 3) a binder agent derived from the binder agent composition, and 4) a current collector&#x201d;, and &#x201c;a method for preparing an electrode for lithium batteries, including coating a current collector with the slurry composition and drying the slurry composition after the coating&#x201d;.

Binder agent composition for lithium battery

Growing community of inventors

Saitama, Japan

Kazuki Takimoto