A laminate of layered substances each containing two or more kinds of elements as constituent elements is contained in an ionic liquid containing a specific cation, and the ionic liquid containing the laminate is irradiated with one or both of sonic waves and electric waves.
在含有特定阳离子的
离子液体中含有由各含有两种或两种以上元素作为组成元素的层状物质组成的层压板,并用声波和电波中的一种或两种对含有层压板的
离子液体进行辐照。