TY - JOUR
T1 - A new high-voltage plateau of Na3V2(PO4)3 for sodium ion batteries
T2 - A promising cathode with high energy density
AU - Chen, Yanjun
AU - Xu, Youlong
AU - He, Shengnan
AU - Zhang, Baofeng
AU - Guo, Li
N1 - Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.
PY - 2021/9/15
Y1 - 2021/9/15
N2 - A promising K/F co-doped and rGO enwrapped K0·04Na2·96V2(PO4)2·98F0·06/C@rGO (KF-NVP/C@rGO) cathode material is synthesized through a feasible carbon thermal reduction route. K+ substitution is applied to broaden the migration channel and F− doping favors to reduce the grain size to improve the diffusion rate of Na+. Moreover, rGO acts as a beneficial conductive network to provide facilitated electronic transportation. A new high-voltage plateau of ~3.8 V has been signed for the deep desodiation/sodiation of KF-NVP/C@rGO, corresponding to the segmental de-intercalation of the third Na+ at Na1 site. The initial reversible capacity can be achieved as high as 132.9 mAh g-1 at 0.1C, which is equivalent to the reversible intercalation of 2.26 Na+. Up to now, this modified composite possesses the highest discharge capacity among all the literatures about Na3V2(PO4)3 material. Moreover, the discharge energy density is 449.7 Wh kg-1 accordingly. This thus turns KF-NVP/C@rGO into a prospective candidate for advanced sodium storage technology.
AB - A promising K/F co-doped and rGO enwrapped K0·04Na2·96V2(PO4)2·98F0·06/C@rGO (KF-NVP/C@rGO) cathode material is synthesized through a feasible carbon thermal reduction route. K+ substitution is applied to broaden the migration channel and F− doping favors to reduce the grain size to improve the diffusion rate of Na+. Moreover, rGO acts as a beneficial conductive network to provide facilitated electronic transportation. A new high-voltage plateau of ~3.8 V has been signed for the deep desodiation/sodiation of KF-NVP/C@rGO, corresponding to the segmental de-intercalation of the third Na+ at Na1 site. The initial reversible capacity can be achieved as high as 132.9 mAh g-1 at 0.1C, which is equivalent to the reversible intercalation of 2.26 Na+. Up to now, this modified composite possesses the highest discharge capacity among all the literatures about Na3V2(PO4)3 material. Moreover, the discharge energy density is 449.7 Wh kg-1 accordingly. This thus turns KF-NVP/C@rGO into a prospective candidate for advanced sodium storage technology.
KW - High energy density
KW - High voltage plateau
KW - Na3V2(PO4)3
KW - Sodium ion batteries
UR - https://www.scopus.com/pages/publications/85108015225
U2 - 10.1016/j.ceramint.2021.06.057
DO - 10.1016/j.ceramint.2021.06.057
M3 - 文章
AN - SCOPUS:85108015225
SN - 0272-8842
VL - 47
SP - 26579
EP - 26583
JO - Ceramics International
JF - Ceramics International
IS - 18
ER -