In Situ Synthesis of WSe₂/CMK-5 Nanocomposite for Rechargeable Lithium-Ion Batteries with a Long-Term Cycling Stability

Abstract

Transition metal dichalcogenides (TMDs) have received intensive interests in lithium-ion batteries owing to their unique lithium-ion storage ability when evaluated as anode materials. In the present work, a nanocomposite of WSe2/CMK-5 was successfully fabricated via a nanocasting route, introducing the unique structure of mesoporous carbon (CMK-5) as a nanorecator. Benefiting from a synergetic effect of WSe2 nanosheets and mesoporous carbon, the WSe2/CMK-5 hybrid electrode exhibited large reversible capacity, high rate performance, and excellent long-term cycling stability. For instance, a specific capacity of 490 mA h g–1 can remain even after 600 cycles at a current density of 0.5 A g–1.