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

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 975 mAh g(-1) after 100 cycles at 0.25 A g(-1). Apart from that, it also manifests a superior cycling stability with capacity of 258 mAh g(-1) after 100 cycles at 0.05 A g(-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. (C) 2017 Elsevier Inc. All rights reserved.