Sodium intercalation/de-intercalation mechanism in Na4MnV(PO4)3 cathode materials

Umair Nisar, R. A. Shakoor, Rachid Essehli, Md. Ruhul Amin, Brahim Orayech, Zubair Ahmad, P. Ramesh Kumar, Ramazan Kahraman, Siham Al-Qaradawi, Ahmed Soliman

Research output: Contribution to journalArticle

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Abstract

Na4MnV(PO4)3 is a sodium ion conducting material with a NASICON type crystal structure. This phase is not much known as an electrode material. The present work focuses on the sodium ion intercalation/de-intercalation mechanism and charge/discharge behavior of the material. The Na4MnV(PO4)3 is synthesized through a sol-gel process and characterized by XRD, SEM, and XPS. The structural analysis confirms the formation of a phase pure crystalline material with nanometric particle size which adopts a trigonal crystal structure. Galvanostatic intermittent titration technique (GITT) measurements indicate that Na4MnV(PO4)3 is electrochemically active having slanting voltage plateaus. Ex-situ and In-situ XRD analysis, as a function of sodium concentration, indicate that the intercalation/de-intercalation of sodium is associated with a single-phase reaction rather than a biphasic reaction when cycled between 1.5 and 4.5 V. The electrochemical measurements on composite electrodes, Na4MnV(PO4)3/CNTS (1 & 3 wt.%), show promising charge/discharge capacity (∼140 mAh/g), good cyclability (100% capacity retention after 40 cycles) and reasonable rate capability. The cyclic voltammetry (CV) and X-ray Photoelectron Spectroscopy (XPS) analyses indicate that the main contributions towards the activity of Na4MnV(PO4)3 can be attributed to the active of Mn2+/Mn3+ and V3+/V4+ redox couple with partial activity of V4+/V5+. The obtained results suggest that Na4MnV(PO4)3 is a promising electrode material which can be achieved better rate performance with long cycling stability and battery performance through engineering of the particle morphology and microstructure.

Original languageEnglish
Pages (from-to)98-106
Number of pages9
JournalElectrochimica Acta
Volume292
DOIs
Publication statusPublished - 1 Dec 2018

Fingerprint

Intercalation
Cathodes
Sodium
Electrodes
X ray photoelectron spectroscopy
Crystal structure
Ions
Titration
Structural analysis
Sol-gel process
Cyclic voltammetry
Particle size
Crystalline materials
Microstructure
Scanning electron microscopy
Composite materials
Electric potential

Keywords

  • Cathode materials
  • Charge/discharge capacity
  • Crystal structure
  • In-situ XRD analysis
  • Intercalation/de-intercalation
  • Sodium ion batteries

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Sodium intercalation/de-intercalation mechanism in Na4MnV(PO4)3 cathode materials. / Nisar, Umair; Shakoor, R. A.; Essehli, Rachid; Amin, Md. Ruhul; Orayech, Brahim; Ahmad, Zubair; Kumar, P. Ramesh; Kahraman, Ramazan; Al-Qaradawi, Siham; Soliman, Ahmed.

In: Electrochimica Acta, Vol. 292, 01.12.2018, p. 98-106.

Research output: Contribution to journalArticle

Nisar, U, Shakoor, RA, Essehli, R, Amin, MR, Orayech, B, Ahmad, Z, Kumar, PR, Kahraman, R, Al-Qaradawi, S & Soliman, A 2018, 'Sodium intercalation/de-intercalation mechanism in Na4MnV(PO4)3 cathode materials', Electrochimica Acta, vol. 292, pp. 98-106. https://doi.org/10.1016/j.electacta.2018.09.111
Nisar, Umair ; Shakoor, R. A. ; Essehli, Rachid ; Amin, Md. Ruhul ; Orayech, Brahim ; Ahmad, Zubair ; Kumar, P. Ramesh ; Kahraman, Ramazan ; Al-Qaradawi, Siham ; Soliman, Ahmed. / Sodium intercalation/de-intercalation mechanism in Na4MnV(PO4)3 cathode materials. In: Electrochimica Acta. 2018 ; Vol. 292. pp. 98-106.
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AU - Amin, Md. Ruhul

AU - Orayech, Brahim

AU - Ahmad, Zubair

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