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Title: Sodium intercalation in the phosphosulfate cathode NaFe 2(PO 4)(SO 4) 2

Abstract

The compound NaFe 2(PO 4)(SO 4) 2 is successfully synthesized via a solid state reaction route and its crystal structure is determined using powder X-ray diffraction data. NaFe 2(PO 4)(SO 4) 2 phase is also characterized by cyclic voltammetry, galvanostatic cycling and electrochemical impedance spectroscopy. NaFe 2(PO 4)(SO 4) 2 crystallizes with the well-known NASICON-type structure. SAED and HRTEM experiments confirm the structural model, and no ordering between the PO 4 -3 and SO 4 -2 polyanions is detected. The electrochemical tests indicate that NaFe 2(PO 4)(SO 4) 2 is a 3 V sodium intercalating cathode. The electrical conductivity is relatively low (2.2 × 10 -6 Scm -1 at 200 °C) and the obtained activation energy is ~0.60eV. The GITT experiments indicate that the diffusivity values are in the range of 10 -11-10 -12 cm 2/s within the measured sodium concentrations.

Authors:
 [1];  [1];  [1];  [2]; ORCiD logo [3];  [4]
  1. Hamad Bin Khalifa Univ., Doha (Qatar). Qatar Environment and Energy Research Inst.
  2. Univ. Complutense, Madrid (Spain). Dept. de Química Inorgánica Facultad de Químicas
  3. National Inst. of Advanced Science and Technology, Osaka (Japan). Research Inst. of Electrochemical Energy
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1495971
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 382; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ben Yahia, Hamdi, Essehli, Rachid, Amin, Ruhul, Boulahya, Khalid, Okumura, Toyoki, and Belharouak, Ilias. Sodium intercalation in the phosphosulfate cathode NaFe2(PO4)(SO4)2. United States: N. p., 2018. Web. doi:10.1016/j.jpowsour.2018.02.021.
Ben Yahia, Hamdi, Essehli, Rachid, Amin, Ruhul, Boulahya, Khalid, Okumura, Toyoki, & Belharouak, Ilias. Sodium intercalation in the phosphosulfate cathode NaFe2(PO4)(SO4)2. United States. doi:10.1016/j.jpowsour.2018.02.021.
Ben Yahia, Hamdi, Essehli, Rachid, Amin, Ruhul, Boulahya, Khalid, Okumura, Toyoki, and Belharouak, Ilias. Thu . "Sodium intercalation in the phosphosulfate cathode NaFe2(PO4)(SO4)2". United States. doi:10.1016/j.jpowsour.2018.02.021. https://www.osti.gov/servlets/purl/1495971.
@article{osti_1495971,
title = {Sodium intercalation in the phosphosulfate cathode NaFe2(PO4)(SO4)2},
author = {Ben Yahia, Hamdi and Essehli, Rachid and Amin, Ruhul and Boulahya, Khalid and Okumura, Toyoki and Belharouak, Ilias},
abstractNote = {The compound NaFe2(PO4)(SO4)2 is successfully synthesized via a solid state reaction route and its crystal structure is determined using powder X-ray diffraction data. NaFe2(PO4)(SO4)2 phase is also characterized by cyclic voltammetry, galvanostatic cycling and electrochemical impedance spectroscopy. NaFe2(PO4)(SO4)2 crystallizes with the well-known NASICON-type structure. SAED and HRTEM experiments confirm the structural model, and no ordering between the PO4-3 and SO4-2 polyanions is detected. The electrochemical tests indicate that NaFe2(PO4)(SO4)2 is a 3 V sodium intercalating cathode. The electrical conductivity is relatively low (2.2 × 10-6 Scm-1 at 200 °C) and the obtained activation energy is ~0.60eV. The GITT experiments indicate that the diffusivity values are in the range of 10-11-10-12 cm2/s within the measured sodium concentrations.},
doi = {10.1016/j.jpowsour.2018.02.021},
journal = {Journal of Power Sources},
number = C,
volume = 382,
place = {United States},
year = {2018},
month = {2}
}

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