Facile fabrication of 2D stanene nanosheets via a dealloying strategy for potassium storage.

In this work, a facile dealloying strategy was developed for the large scale fabrication of 2D stanene nanosheets under ambient conditions. The obtained stanene nanosheets exhibited typical 2D structure with a thickness of 4 nm and a lateral size of several micrometers. Furthermore, the 2D stanene nanosheets displayed outstanding performance in potassium storage.