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Facile synthesis of Bi 2 MoO 6 /reduced graphene oxide composites as anode materials towards enhanced lithium storage performance.

Bi2 MoO6 /reduced graphene oxide (Bi2 MoO6 /rGO) composites were fabricated by a facile one-pot hydrothermal approach, in which Bi2 MoO6 nanosheets and rGO were simultaneously obtained. The structure and composition of the as-synthesized Bi2 MoO6 and Bi2 MoO6 /rGO materials were characterized via FT-IR, BET, TGA, XRD, TEM, SEM and XPS analyses, and the electrochemical performance of Bi2 MoO6 /rGO as an anode in a lithium-ion battery was investigated. Compared with pristine Bi2 MoO6 , the Bi2 MoO6 /rGO composites have higher capacities, better cycle stability and higher rates. For a current density of 100 mA g-1 , the initial discharge capacities of the Bi2 MoO6 /rGO-20 and pristine Bi2 MoO6 were 1049.6 mAh g-1 and 528.5 mAh g-1 , respectively. After 100 cycles, the capacity retention for the Bi2 MoO6 /rGO-20 and pristine Bi2 MoO6 were respectively 80.4% and 30.7% using the 2nd cycle capacities (895.8 and 402.4 mAh g-1 ) as references. The enhanced electrochemical performance can be ascribed to the synergistic effect of the Bi2 MoO6 and rGO sheets, which dramatically improves the conductivities of the Bi2 MoO6 /rGO anodes. In addition, the rGO sheets also supply electron transfer routes for the anode and suppress volume changes of Bi2 MoO6 nanosheets during the charge-discharge cycles.

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