@article{31930,
  author = {Yanli Ruan and Jingjing Liu and Shidong Song and Ningyi Jiang and Vincent S Battaglia},
  title = {Multi-hierarchical nanosheet-assembled chrysanthemum-structured Na3V2(PO4)3/C as electrode materials for high-performance sodium-ion batteries},
  abstract = {<p>The structure and morphology of sodium vanadium phosphate (Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>) play a vital role in enhancing the electrochemical performance of sodium-ion batteries due to the inherent poor electronic conductivity of the phosphate framework. In order to improve this drawback, a new chrysanthemum-structured <span>(Na</span><sub>3</sub><span>V</span><sub>2</sub><span>(PO</span><sub>4</sub><span>)</span><sub>3</sub>/C material has been successfully assembled with multi-hierarchical nanosheets via a hydrothermal method. Continuous scattering nanosheets in chrysanthemum petals are beneficial in reducing energy consumption during the process of sodium ion diffusion, on which the carbon-coated surface can significantly increase overall conductivity. The as-prepared sample exhibits outstanding electrochemical performance due to its unique structure. It rendered a high initial specific capacity of 117.4&thinsp;mAh&thinsp;g<sup>−1</sup> at a current density of 0.05 C. Further increasing the current density to 10 C, the initial specific capacity still achieves 101.3&thinsp;mAh&thinsp;g<sup>−1</sup> and remains at 87.5&thinsp;mAh&thinsp;g<sup>−1</sup> after 1000 cycles. In addition, a symmetrical sodium-ion full battery using the chrysanthemum-structured Na3V2(PO4)3/C materials as both the cathode and anode has been successfully fabricated, delivering the capacity of 62&thinsp;mAh&thinsp;g<sup>−1</sup> at 1&thinsp;C and achieving the coulombic efficiency at an average of 96.4% within 100 cycles. These results indicate that the new chrysanthemum-structured <span>(Na</span><sub>3</sub><span>V</span><sub>2</sub><span>(PO</span><sub>4</sub><span>)</span><sub>3</sub>/C can provide a new idea for the development of high-performance sodium-ion batteries.</p>},
  year = {2018},
  journal = {Ionics},
  volume = {24},
  pages = {1663 - 1673},
  month = {06/2018},
  issn = {0947-7047},
  doi = {10.1007/s11581-017-2342-0},
  language = {eng},
}