TY - JOUR
T1 - A High Rate and Long Cycling Performance NaTi2(PO4)3 Core–Shell Porous Nanosphere Anode for Aqueous Sodium-Ion Batteries
AU - Xu, Tong
AU - Zhao, Mingshu
AU - Li, Zheng
AU - Su, Zhou
AU - Ren, Wei
AU - Yang, Sen
AU - Pol, Vilas G.
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/11
Y1 - 2022/11
N2 - NASICON-type material NaTi2(PO4)3 has a suitable working potential (−0.87 V vs saturated calomel electrode) in aqueous sodium-ion cells. Nevertheless, the inherent electronic conductivity in the internal core and external shell limits its rate and cycling performance. Herein, a carbon-coated porous nanosphere NaTi2(PO4)3 material is synthesized by the solvothermal method. This structure effectively improves the electrical conductivity, enlarges the contact area with the electrolyte, and facilitates the rapid intercalation/deintercalation of Na+. It delivers an excellent rate behavior of 123.59, 113.55, 102.81, 90.85, and 60.95 mAh g−1 at 0.2, 0.5, 1, 2, and 5 A g−1, respectively. Improved long cyclability under a 5 A g−1 high current density is also demonstrated by a capacity retention of 70.2% over 500 cycles and an average Coulombic efficiency of 98%. As-prepared core–shell porous nanosphere NaTi2(PO4)3 exhibits potentially practical applications in a new type of aqueous sodium-ion battery system.
AB - NASICON-type material NaTi2(PO4)3 has a suitable working potential (−0.87 V vs saturated calomel electrode) in aqueous sodium-ion cells. Nevertheless, the inherent electronic conductivity in the internal core and external shell limits its rate and cycling performance. Herein, a carbon-coated porous nanosphere NaTi2(PO4)3 material is synthesized by the solvothermal method. This structure effectively improves the electrical conductivity, enlarges the contact area with the electrolyte, and facilitates the rapid intercalation/deintercalation of Na+. It delivers an excellent rate behavior of 123.59, 113.55, 102.81, 90.85, and 60.95 mAh g−1 at 0.2, 0.5, 1, 2, and 5 A g−1, respectively. Improved long cyclability under a 5 A g−1 high current density is also demonstrated by a capacity retention of 70.2% over 500 cycles and an average Coulombic efficiency of 98%. As-prepared core–shell porous nanosphere NaTi2(PO4)3 exhibits potentially practical applications in a new type of aqueous sodium-ion battery system.
KW - NaTi(PO)
KW - aqueous sodium-ion batteries
KW - core–shell porous structure
KW - high electrochemical performance
UR - https://www.scopus.com/pages/publications/85137880857
U2 - 10.1002/ente.202200970
DO - 10.1002/ente.202200970
M3 - 文章
AN - SCOPUS:85137880857
SN - 2194-4288
VL - 10
JO - Energy Technology
JF - Energy Technology
IS - 11
M1 - 2200970
ER -