NaNbV(PO4)3: Multielectron NASICON-Type Anode Material for Na-Ion Batteries with Excellent Rate Capability

Nellie R Khasanova; Rodion V Panin; Ilia R Cherkashchenko; Maxim V Zakharkin; Daniil A Novichkov; Evgeny V Antipov

doi:10.1021/acsami.3c04576

NaNbV(PO₄)₃: Multielectron NASICON-Type Anode Material for Na-Ion Batteries with Excellent Rate Capability

ACS Appl Mater Interfaces. 2023 Jun 28;15(25):30272-30280. doi: 10.1021/acsami.3c04576. Epub 2023 Jun 17.

Authors

Nellie R Khasanova¹, Rodion V Panin¹, Ilia R Cherkashchenko^{1

2}, Maxim V Zakharkin¹, Daniil A Novichkov¹, Evgeny V Antipov^{1

2}

Affiliations

¹ Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia.
² Skolkovo Institute of Science and Technology, Moscow 143026, Russia.

PMID: 37329310
DOI: 10.1021/acsami.3c04576

Abstract

NASICON-type NaNbV(PO₄)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 Nb⁵⁺/Nb⁴⁺, Nb⁴⁺/Nb³⁺, and V³⁺/V²⁺ 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(PO₄)₃ polyhedron framework during cycling, while XANES measurements in the operando regime confirmed the multielectron transfer upon sodium intercalation/extraction into NaNbV(PO₄)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.

Keywords: NASICON-type structure; Na-ion batteries; anode material; multielectron reaction; operando XANES; operando diffraction; rate capability.