Architecting carbon-coated Mo2CTx/MoSe2 heterostructures enables robust potassium storage

Herein, carbon-coated MoSe2 decorated Mo(2)CTx MXene heterostructures (MoSe2/Mo2CTx@C) have been fabricated. Mo2CTx works as a dual-function electron/ion conductor, which not only provides high conductivity and mechanical strength, but also prevents the severe self-aggregation of few layered MoSe2 nanosheets. The high reversible capacities of 405 mA h g(-1) at 100 mA g(-1) after 150 cycles and 258 mA h g(-1) at 2000 mA g(-1) after 400 cycles could be achieved for a potassium-ion battery.

Automated summary

In this study, carbon-coated MoSe2 decorated Mo(2)CTx MXene heterostructures were fabricated, which exhibited high reversible capacities in potassium-ion batteries.