Self-assembly of CoS2/graphene nanoarchitecture by a facile one-pot route and its improved electrochemical Li-storage properties

Sandwich-like octahedral cobalt disulfide/reduced graphene oxide as an efficient Pt-free electrocatalyst for high-performance dye-sensitized solar cells

“…The results further confirm the formation of CoS 2 species in the hybrid materials. of GO in composite during synthesis process [43]. In addition, it can be seen that the relative intensity of D´ peaks with respect to the G band of CoS 2 /RGO reduce, while the relative intensity of faintly visible G´ band increase.…”

“…Nevertheless, the graphite (002) diffraction peak is not clearly observed, which may be attributed to the fact that the restacking of the graphene sheets is restrained by immobilizing the CoS 2 nanoparticles onto both sides of graphene sheet, resulting in the weak or even disappearance of the graphite (002) diffraction [43]. In addition, the weak diffraction signals of non-crystalline and low-content RGO may also be covered up by the strong diffraction signals of CoS 2 due to its high crystallinity [44].…”

Self-assembled CoS2 nanoparticles wrapped by CoS2-quantum-dots-anchored graphene nanosheets as superior-capability anode for lithium-ion batteries

“…Lithium-ion batteries (LIBs) are one of the most promising energy storage devices for upcoming largescale applications in EVs due to their high energy density, long lifespan and environmental benignity. To meet the demands of higher energy density and power density, various metal sulfides, including SnS 2 [4][5][6], MoS 2 [7][8][9], CoS [10] and CoS 2 [11][12][13], have been studied as possible candidates to replace carbonaceous anode materials for LIBs. Among them, CoS 2 has attracted great attention, and valuable efforts have been made to demonstrate its potential application as anode material for LIBs due to its very high theoretical capacity of 870 mAh g À1 .…”

“…Xie et al [12] prepared CoS 2 /graphene nanoarchitecture by a one-step method with high reversible capacity of 770 mAh g À1 and good rate capability of 400 mAh g À1 at 800 mA g À1 . Guo et al [24] reported the hydrothermal synthesis of CoS 2 nanoparticle-loaded graphene composite with a high reversible capacity of 994 mAh g À1 at 50 mA g À1 and 641 mAh g À1 at 1000 mA g À1 .…”

“…Guo et al [24] reported the hydrothermal synthesis of CoS 2 nanoparticle-loaded graphene composite with a high reversible capacity of 994 mAh g À1 at 50 mA g À1 and 641 mAh g À1 at 1000 mA g À1 . It is noted that the existence of CoS second phase with lower theoretical capacity (589 mAh g À1 ) will decrease the overall capacity [12]. Qiu et al [13] developed a simple hydrothermal method to produce graphene wrapped pure CoS 2 phase with enhanced reversible capacity; however, the rate capability is not so high mainly due to the large size of CoS 2 particles.…”