Complete Three-Electron Vanadium Redox in NASICON-Type Na3VSc(PO4)3 Electrode Material for Na-Ion Batteries
Here we introduce a new NASICON-type Na3VSc(PO4)3 positive electrode material for Na-ion batteries demonstrating reversible (de)intercalation of 3 Na cations per formula unit within a wide voltage range with complex voltage-composition dependence. The total electrochemical capacity of the material is 170 mAh g−1 that corresponds to the complete three-electron V2+/V3+/V4+/V5+ process. All the (de)sodiation stages follow a predominantly solid-solution mechanism, as shown by operando X-ray powder diffraction. The oxidation of vanadium up to +5 upon the charge of Na3VSc(PO4)3 to 4.5 V vs Na/Na+ causes the significant transformation of the unit cell. According to ex situ Fourier-transformed infrared spectroscopy it is accompanied by the increasing distortion of the vanadium coordination environment and shortening of the vanadium-oxygen bonds. This leads to the irreversible character of the charge-discharge curve, and the initial structure can be restored after the strong overdischarge to ≈1.5 V vs Na/Na+.
Citations by journals
1
|
|
ACS Applied Energy Materials
|
ACS Applied Energy Materials
1 publication, 16.67%
|
Energies
|
Energies
1 publication, 16.67%
|
Chemistry of Materials
|
Chemistry of Materials
1 publication, 16.67%
|
Energy Storage Materials
|
Energy Storage Materials
1 publication, 16.67%
|
Materials Futures
|
Materials Futures
1 publication, 16.67%
|
Russian Journal of Electrochemistry
|
Russian Journal of Electrochemistry
1 publication, 16.67%
|
1
|
Citations by publishers
1
2
|
|
American Chemical Society (ACS)
|
American Chemical Society (ACS)
2 publications, 33.33%
|
Multidisciplinary Digital Publishing Institute (MDPI)
|
Multidisciplinary Digital Publishing Institute (MDPI)
1 publication, 16.67%
|
Elsevier
|
Elsevier
1 publication, 16.67%
|
IOP Publishing
|
IOP Publishing
1 publication, 16.67%
|
Pleiades Publishing
|
Pleiades Publishing
1 publication, 16.67%
|
1
2
|
- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.