MoS$_{2}$/graphene Composite Paper Electrodes for Na-ion Battery Applications

We study the synthesis, electrochemical and mechanical performance of large area layered freestanding papers composed of acid functionalized few layer molybdenum disulfide (MoS$_{2})$ and reduced graphene oxide (rGO) flakes for use as a self-standing flexible electrode in sodium ion batteries. Synthesis was achieved through vacuum filtration of homogenous dispersions consisting of varying wt. {\%} of exfoliated MoS$_{2}$ flakes in GO in DI water, followed by thermal reduction. The electrochemical behavior of the composite paper was evaluated as counter electrode against pure Na foil in a half-cell configuration. The papers showed good Na cycling ability with charge capacity of approx. 225 mAh.g$^{-1}$ with respect to total weight of the electrode and coulombic efficiency reaching 99{\%}.