Design and Synthesis of SnO2 Nanosheets/Nickel/Polyvinylidene Fluoride Ternary Composite as Free-standing, Flexible Electrode for Lithium Ion Batteries

Abstract In this report, we have designed a novel SnO 2 nanosheets/nickel/polyvinylidene fluoride ternary composite as anode materials for lithium ion batteries. The SnO 2 nanosheets are uniformly coated on the surface of nickel/polyvinylidene fluoride conductive fiber, as confirmed by XRD, SEM, and TEM characterizations. As an anode material for lithium ion batteries, this as-prepared ternary composite delivers a high capacity of 865.4 mAh g −1 at 200 mA g −1 after 60 cycles. Furthermore, the SnO 2 in this composite material exhibits a good capacity retention as well as rate capability. This result indicates the completely reversible reaction between Li 4.4 Sn and SnO 2 , greatly improving the specific capacity of SnO 2 . The ternary SnO 2 /Ni/PVDF composite limits the volume expansion on lithium insertion, and buffer spaces during charge/discharge, resulting in the excellent cyclic performances.

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