Cobalt disulfide nanoparticles/graphene/carbon nanotubes aerogels with superior performance for lithium and sodium...

A robust and interconnected three-dimensional (3D) aerogel consisting of CoS₂ nanoparticles, graphene nanosheets (GNs) and carbon nanotubes (CNTs) is synthesized as an anode material (CoS₂/GCAs) for lithium ion batteries (LIBs) and sodium ion batteries (SIBs). With the introduction of CNTs, the isolated CoS₂ nanoparticles as well as GNs are jointed closely and cross-linked to construct a 3D conductive network. Benefited from the advantages of the positive synergistic effects of the individual components, CoS₂/GCAs composite exhibits excellent electrochemical performances. When used as an anode for LIBs, it possesses a high reversible capacity of 975mAhg^-1 after 100 cycles at 0.25Ag^-1. Apart from that, it also manifests a superior cycling stability with capacity of 258mAhg^-1 after 100 cycles at 0.05Ag^-1 for SIBs. As a result of the enhanced electrochemical performance, CoS₂/GCAs composite with an interconnected architecture could be regarded as a promising candidate for LIBs/SIBs.