BINDER FOR ELECTRICITY STORAGE DEVICES IMPROVING DISPERSIBILITY OF CONDUCTIVE ASSISTANT
申请人:FUJIFILM Wako Pure Chemical Corporation
公开号:EP4023686A1
公开(公告)日:2022-07-06
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 tanδ 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 tanδ > 1 in a strain dispersion measurement under measurement conditions of a measurement temperature of 25°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 m2/g or more and 70 m2/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.
本发明的目的是提供一种对导电助剂具有优异分散性的粘结剂;一种浆料组合物和一种电极,其中每种都使用这种粘结剂;以及一种带有这种电极的储电装置。
本发明涉及一种用于储电装置的粘结剂,其中 0.5%(质量)的粘结剂和 4.6% (质量百分比)的导电助剂,在测量温度为 25°C 和频率为 1 Hz 的测量条件下进行应变分散测量时,损耗正切 tanδ > 1,且导电助剂为乙炔黑,其平均颗粒直径大于或等于 30 nm,小于或等于 40 nm,比表面积大于或等于 65 m2/g,小于或等于 70 m2/g。