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Microwave-Assisted Synthesis of Porous Nano-Sized Na 3V 2(PO 4) 2F 3@C Nanospheres for Sodium Ion Batteries with Enhanced Stability

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Document pages: 16 pages

Abstract: Na3V2(PO4)2F3 is a prospective cathode material for sodium ion batteries (SIBs) because of its high theoretical capacity. Nevertheless, its low electronic conductivity leads to poor cycling and rate performance, hindering its practical application. In this work, ultrafine-Na3V2(PO4)2F3 nanocrystals less than 20 nm embedded in porous carbon nanospheres are fabricated via a microwave-assisted glycerol-mediated hydrothermal process followed by annealing. Microwave irradiation is shown to be critical for the formation of homogenous ultrafine nanostructure. The product exhibits a charge discharge capacity of 106 mAh g-1 at 0.5 C after 100 cycles with a retention of approximate 100 as cathode material for SIBs.

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