Issue 11, 2020

High power Na3V2(PO4)3 symmetric full cell for sodium-ion batteries


Sodium-ion batteries (SIBs) are a viable substitute for lithium-ion batteries due to the low cost and wide availability of sodium. However, practical applications require the development of fast charging sodium-ion-based full-cells with high power densities. Na3V2(PO4)3 (NVP) is a bipolar material with excellent characteristics as both a cathode and an anode material in SIBs. Designing symmetric cells with NVP results in a single voltage plateau with significant specific capacity which is ideal for a full cell. Here we demonstrate for the first time a tremendous improvement in the performance of NVP symmetric full cells by introducing an ether-based electrolyte which favors fast reaction kinetics. In a symmetric full cell configuration, 75.5% of the initial capacity was retained even after 4000 cycles at 2 A g−1, revealing ultra-long cyclability. Excellent rate performances were obtained at current densities as high as 1000C, based on the cathode mass, revealing ultrafast Na+ transfer. The power density obtained for this NVP symmetric cell (48 250 W kg−1) is the best among those of all the sodium-ion-based full cells reported to date.

Graphical abstract: High power Na3V2(PO4)3 symmetric full cell for sodium-ion batteries

Supplementary files

Article information

Article type
31 Aug 2020
26 Sep 2020
First published
20 Oct 2020
This article is Open Access
Creative Commons BY license

Nanoscale Adv., 2020,2, 5166-5170

High power Na3V2(PO4)3 symmetric full cell for sodium-ion batteries

M. K. Sadan, A. K. Haridas, H. Kim, C. Kim, G. Cho, K. Cho, J. Ahn and H. Ahn, Nanoscale Adv., 2020, 2, 5166 DOI: 10.1039/D0NA00729C

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