Porous Na3V2(PO4)3/C nanoplates for high-performance sodium storage

Xuemei Li; Shijian Wang; Xiao Tang; Rui Zang; Peng Li; Pengxin Li; Zengming Man; Cong Li; Shuaishuai Liu; Yuhan Wu; Guoxiu Wang

doi:10.1016/j.jcis.2018.12.071

Porous Na₃V₂(PO₄)₃/C nanoplates for high-performance sodium storage

J Colloid Interface Sci. 2019 Mar 15:539:168-174. doi: 10.1016/j.jcis.2018.12.071. Epub 2018 Dec 18.

Authors

Xuemei Li¹, Shijian Wang², Xiao Tang², Rui Zang¹, Peng Li¹, Pengxin Li¹, Zengming Man¹, Cong Li¹, Shuaishuai Liu¹, Yuhan Wu¹, Guoxiu Wang³

Affiliations

¹ College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210006, PR China.
² Centre of Clean Energy Technology, Faculty of Science, University of Technology, Sydney, NSW 2007, Australia.
³ Centre of Clean Energy Technology, Faculty of Science, University of Technology, Sydney, NSW 2007, Australia. Electronic address: Guoxiu.Wang@uts.edu.au.

PMID: 30580172
DOI: 10.1016/j.jcis.2018.12.071

Abstract

Sodium super-ionic conductor (NASICON) structured Na₃V₂(PO₄)₃ (NVP), a promising cathode material for sodium-ion batteries (SIBs), benefits by its unique three-dimensional (3D) channel structure. However, the inherent characteristics of NVP (such as low electrical conductivity) usually lead to inferior rate and long-cycling performance, which miss the requirements of practical application in electrical energy storage systems (ESSs). Herein, we propose the synthesis of porous high-crystalline Na₃V₂(PO₄)₃/C nanoplates (NVP/C-P) via hydrothermal method and post-calcination. The porous nanoplate structure provides increased specific surface area and shortened diffusion pathway for ion/electron transport. Consequently, NVP/C-P cathodes exhibit a high specific capacity (117 mAh g^-1, 0.2 C), exceptional rate performance (76.5 mAh g^-1, 100 C) and long cyclic stability (10,000 cycles).

Keywords: Cathode materials; Na(3)V(2)(PO(4))(3); Nanoplate; Porous structure; Sodium-ion batteries.