NaNbV(PO 4 ) 3 : Multielectron NASICON-Type Anode Material for Na-Ion Batteries with Excellent Rate Capability.

Autor: Khasanova NR; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia., Panin RV; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia., Cherkashchenko IR; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia.; Skolkovo Institute of Science and Technology, Moscow 143026, Russia., Zakharkin MV; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia., Novichkov DA; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia., Antipov EV; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia.; Skolkovo Institute of Science and Technology, Moscow 143026, Russia.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2023 Jun 28; Vol. 15 (25), pp. 30272-30280. Date of Electronic Publication: 2023 Jun 17.
DOI: 10.1021/acsami.3c04576
Abstrakt: NASICON-type NaNbV(PO 4 ) 3 electrode material synthesized by the Pechini sol-gel technique undergoes a reversible three-electron reaction in a Na-ion cell which corresponds to the Nb 5+ /Nb 4+ , Nb 4+ /Nb 3+ , and V 3+ /V 2+ redox processes and provides a reversible capacity of 180 mAh·g -1 . The sodium insertion/extraction takes place in a narrow potential range at an average potential of 1.55 V versus Na + /Na. Structural characterization by operando and ex situ X-ray diffraction disclosed the reversible evolution of the NaNbV(PO 4 ) 3 polyhedron framework during cycling, while XANES measurements in the operando regime confirmed the multielectron transfer upon sodium intercalation/extraction into NaNbV(PO 4 ) 3 . This electrode material demonstrates extended cycling stability and excellent rate capability maintaining the capacity value of 144 mAh·g -1 at 10 C current rates. It can be regarded as a superior anode material suitable for application in high-power and long-life sodium-ion batteries.
Databáze: MEDLINE
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