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Carbon-Coated Na3V2(PO4)3 Embedded in Porous Carbon Matrix: An Ultrafast Na-Storage Cathode with the Potential of Outperforming Li Cathodes

Zhu, Changbao, Song, Kepeng, van Aken, Peter A., Maier, Joachim, Yu, Yan·2014·Nano Letters

Abstract

Sodium ion batteries are one of the realistic promising alternatives to the lithium analogues. However, neither theoretical energy/power density nor the practical values reach the values of Li cathodes. Poorer performance is expected owing to larger size, larger mass, and lower cell voltage. Nonetheless, sodium ion batteries are considered to be practically relevant in view of the abundance of the element Na. The arguments in favor of Li and to the disadvantage of Na would be completely obsolete if the specific performance data of the latter would match the first. Here we present a cathode consisting of carbon-coated nanosized Na3V2(PO4)3 embedded in a porous carbon matrix, which not only matches but even outshines lithium cathodes under high rate conditions. It can be (dis)charged in 6 s with a current density as high as 22 A/g (200 C), still delivering a specific capacity of 44 mAh/g, while up to 20 C, the polarization is completely negligible.

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Authors
Zhu, C., Song, K., van Aken, P. A., Maier, J., & Yu, Y.
Venue
Nano Letters
Published
2014-03-31
Volume
14
Issue
4
Pages
2175-2180
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W2070842180
Cited by
504
References
0
FWCI
34.14
Type
journal article
Language
en
Open access
closed

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