Whisker-grown body and electrochemical capacitor using the same

摘要

A whisker-grown body of the present invention includes a raw material substrate made of manganese-containing metal and/or ceramics, and a whisker containing 50% by mass or more of manganese dioxide and formed on a surface of the raw material substrate. The whisker-grown body has a high surface ratio to unit volume and improves electrode efficiency when used as an electrode of an electrochemical capacitor.