Improving the cycling stability of Na3V2(PO4)(3) nanoparticle in aqueous sodium ion batteries by introducing carbon support
by Zhou, H. J.; Tian, Z. R.; Ang, S. S.
Here we report the electrochemical performances of a Na3V2(PO4)(3)/C nanocomposite as a cathode material for aqueous sodium-ion batteries (SIBs). Compared to a previously reported Na3V2(PO4)(3) microparticle, this nanocomposite demonstrated much improved cycling stability. While the improvement mainly attributed to the right pH and the carbon matrixmediated protection against the electrolyte, the capacity fade was mainly due to the deterioration of crystallinity and structure of the nanocomposite caused by various interactions between the nanocomposite and electrolyte. This work not only help to understand the degradation of Na3V2(PO4)(3) in aqueous SIBs, but also shed light on the design and fabrication of electrode materials with high cycling stability for aqueous SIBs.