Mechanically robust and size-controlled MoS2/graphene hybrid aerogels as high-performance anodes for lithium-ion batteries

Controllable layered MoS 2 on 3D graphene aerogel (MoS 2 /GA) was synthesized via a facial hydrothermal process. As-prepared MoS 2 /graphene hybrid aerogels with desirable sizes serve directly as free-standing and binder-free anodes for lithium-ion batteries (LIB) without the need for mechanical cutting or mixing. The mechanical properties of MoS 2 /GA samples were quantitatively investigated to demonstrate their high mechanical robustness with Young’s modulus values up to 59.2 kPa and recoverable deformability of 90% elastic strain, indicating their ability to resist large-scale deformation or fatigue stress during LIB applications. Moreover, the effects of the MoS 2 mass loading on both microstructure and electrochemical performance of MoS 2 /GA were systematically investigated. Hierarchical nanostructures of MoS 2 /GA with a mass ratio of MoS 2 to graphene oxide as 1:2.5 exhibit a high specific capacity of 1360.5 mAh g −1 at a current density of 100 mAh g −1 . These materials also have desirable rate capability and good cyclic stability, demonstrating their utility in energy storage devices.