Abstract
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.
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