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

• Published in: Journal of colloid and interface science Vol. 505; pp. 23 - 31
• Main Authors: Zhang, Xing, Jie Liu, Xiao, Wang, Gang, Wang, Hui
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.11.2017
• Subjects: Aerogel; Battery; CoS2; Electrochemical performance; Synergistic effect; Electrochemical performance; CoS2; Synergistic effect; Aerogel; Battery; CoS
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2017.05.028

CoS2/GCAs composite is synthesized by a facile hydrothermal method and delivers an outstanding electrochemical performance for LIBs/SIBs. [Display omitted] 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.