The present invention is characterized by containing an electroconductive carbon, a water-soluble polymer, a particulate binding agent, and a dispersion medium, in which the water-soluble polymer is an isobutylene-maleic anhydride copolymer containing a structural unit (a) represented by the following general formula (I),
, and is partially hydrolyzed.
本发明的特点是含有导电碳、
水溶性聚合物、微粒结合剂和分散介质,其中
水溶性聚合物是
异丁烯-
马来酸酐共聚物,含有由以下通式(I)表示的结构单元(a)、
并部分
水解。