Synthesis and performance evaluation of nanostructured NaFexCr1-X(SO4)2 cathode materials in sodium ion batteries (SIBs)

Umair Nisar, Mona Hersi Gulied, R. A. Shakoor, Rachid Essehli, Zubair Ahmad, Abdullah Alashraf, Ramazan Kahraman, Siham Al-Qaradawi, Ahmed Soliman

Research output: Contribution to journalArticle

Abstract

This research work focuses on the synthesis and performance evaluation of NaFexCr1-X(SO4)2 (X = 0, 0.8 and 1.0) cathode materials in sodium ion batteries (SIBs). The novel materials having a primary particle size of around 100-200 nm were synthesized through a sol-gel process by reacting stoichiometric amounts of the precursor materials. The structural analysis confirms the formation of crystalline, phase pure materials that adopt a monoclinic crystal structure. Thermal analysis indicates the superior thermal stability of NaFe0.8Cr0.2(SO4)2 when compared to NaFe(SO4)2 and NaCr(SO4)2. Galvanostatic charge/discharge analysis indicates that the intercalation/de-intercalation of a sodium ion (Na+) into/from NaFe(SO4)2 ensues at about 3.2 V due to the Fe2+/Fe3+ active redox couple. Moreover, ex situ XRD analysis confirms that the insertion/de-insertion of sodium into/from the host structure during charging/discharging is accompanied by a reversible single-phase reaction rather than a biphasic reaction. A similar sodium intercalation/de-intercalation mechanism has been noticed in NaFe0.8Cr0.2(SO4)2which has not been reported earlier. The galvanostatic measurements and X-ray photoelectron spectroscopy (XPS) analysis confirm that the Cr2+/Cr3+ redox couple is inactive in NaFexCr1-X(SO4)2 (X = 0, 0.8) and thus does not contribute to capacity augmentation. However, suitable carbon coating may lead to activation of the Cr2+/Cr3+ redox couple in these inactive materials.

Original languageEnglish
Pages (from-to)32985-32991
Number of pages7
JournalRSC Advances
Volume8
Issue number57
DOIs
Publication statusPublished - 1 Jan 2018

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Intercalation
Cathodes
Sodium
Ions
Structural analysis
Thermoanalysis
Sol-gel process
Thermodynamic stability
Carbon
X ray photoelectron spectroscopy
Crystal structure
Chemical activation
Particle size
Crystalline materials
Coatings
Oxidation-Reduction

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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Synthesis and performance evaluation of nanostructured NaFexCr1-X(SO4)2 cathode materials in sodium ion batteries (SIBs). / Nisar, Umair; Gulied, Mona Hersi; Shakoor, R. A.; Essehli, Rachid; Ahmad, Zubair; Alashraf, Abdullah; Kahraman, Ramazan; Al-Qaradawi, Siham; Soliman, Ahmed.

In: RSC Advances, Vol. 8, No. 57, 01.01.2018, p. 32985-32991.

Research output: Contribution to journalArticle

Nisar, U, Gulied, MH, Shakoor, RA, Essehli, R, Ahmad, Z, Alashraf, A, Kahraman, R, Al-Qaradawi, S & Soliman, A 2018, 'Synthesis and performance evaluation of nanostructured NaFexCr1-X(SO4)2 cathode materials in sodium ion batteries (SIBs)', RSC Advances, vol. 8, no. 57, pp. 32985-32991. https://doi.org/10.1039/c8ra06583g
Nisar, Umair ; Gulied, Mona Hersi ; Shakoor, R. A. ; Essehli, Rachid ; Ahmad, Zubair ; Alashraf, Abdullah ; Kahraman, Ramazan ; Al-Qaradawi, Siham ; Soliman, Ahmed. / Synthesis and performance evaluation of nanostructured NaFexCr1-X(SO4)2 cathode materials in sodium ion batteries (SIBs). In: RSC Advances. 2018 ; Vol. 8, No. 57. pp. 32985-32991.
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AU - Essehli, Rachid

AU - Ahmad, Zubair

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AU - Soliman, Ahmed

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