Ultralong, as long as ∼1 mm, orthorhombic vanadium pentoxide (VO) nanowires were synthesized using a hydrothermal method. Free-standing and binder-free composite paper was prepared on a large scale by a two-step reduction method using free-standing VO nanowires as the skeleton and reduced graphene oxide (rGO) nanosheets as the additive. Such a free-standing VO/rGO composite paper as a cathode for lithium ion batteries possesses both structural integrity and extraordinary electrochemical performance. The reversible specific areal capacity of the VO/rGO composite paper electrode is 885 μAh/cm at 0.09 mA/cm, much higher than that of the pure VO nanowire paper electrode (570 μAh/cm). It also shows excellent cycling performance at high rates with 30.9% loss of its initial capacities after 1000 cycles at a current rate of 0.9 mA/cm. The excellent performance was attributed to the improved electronic conductivity and Li ion transport from the rGO addition.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641031 | PMC |
| http://dx.doi.org/10.1021/acsomega.7b00037 | DOI Listing |
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