Sandwich-structured Fe3O4@C@MoSe2 architecture for efficient lithium-ion storage

A unique sandwich structure Fe3O4@C@MoSe2 architecture is proposed for high-performance lithium storage. Carbon shell as the connection of in/external structures can not only improve the overall conductivity but also alleviate the volume expansion of Fe3O4 and avoid the aggregation of MoSe2 nanosheets. Moreover, MoSe2 nanosheets on carbon shell demonstrate enlarged interlayer spacing, which can accelerate the kinetics of Li+, and thus improve the rate performance.A unique sandwich structure Fe3O4@C@MoSe2 architecture is proposed for high-performance lithium storage. Carbon shell as the connection of in/external structures can not only improve the overall conductivity but also alleviate the volume expansion of Fe3O4 and avoid the aggregation of MoSe2 nanosheets. Moreover, MoSe2 nanosheets on carbon shell demonstrate enlarged interlayer spacing, which can accelerate the kinetics of Li+, and thus improve the rate performance.