Phase-switchable preparation of two-dimensional WS2 is achieved through an electrochemical Li+ intercalation-based exfoliation strategy. A low discharge current density with high cutoff voltage produces pure semiconducting 2H phase WS2 bilayers, while a higher discharge current density with a lower cutoff voltage favours semimetallic 1T′ phase WS2 monolayers.
- Liang Mei
- Zhan Gao
- Zhiyuan Zeng