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Title: Spray-drying as a tool to disperse conductive carbon inside Na 2FePO 4F particles by addition of carbon black or carbon nanotubes to the precursor solution

Abstract

In this work, Na 2FePO 4F-carbon composite powders were prepared by spray-drying a solution of inorganic precursors with 10 and 20 wt% added carbon black (CB) or carbon nanotubes (CNTs). In order to compare the effect of CB and CNT when added to the precursor solutions, the structural, electrochemical, and morphological properties of the synthesized Na 2FePO 4F-xCB and Na 2FePO 4F-xCNT samples were systematically investigated. In both cases, X-ray diffraction shows that calcination at 600 °C in argon leads to the formation of Na 2FePO 4F as the major inorganic phase. 57Fe Mössbauer spectroscopy was used as complementary technique to probe the oxidation states, local environment, and identify the composition of the iron-containing phases. The electrochemical performance is markedly better in the case of Na 2FePO 4F-CNT (20 wt%), with specific capacities of about 100 mAh/g (Na 2FePO 4F-CNT) at C/4 rate vs. 50 mAh/g for Na 2FePO 4F-CB (20 wt%). SEM characterization of Na 2FePO 4F-CB particles revealed different particle morphologies for the Na 2FePO 4F-CNT and Na 2FePO 4F-CB powders. The carbon-poor surface observed for Na 2FePO 4F-CB could be due to a slow diffusion of carbon in the droplets during drying. On the contrary, Na 2FePOmore » 4F-CNT shows a better CNT dispersion inside and at the surface of the NFPF particles that improves the electrochemical performance.« less

Authors:
 [1];  [1];  [1]; ORCiD logo [2];  [1];  [1];  [3];  [3];  [1];  [1];  [1]
  1. Univ. of Liege, (Belgium). GREENMat, CESAM Research Unit, Inst. of Chemistry B6
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. Univ. of Liege, (Belgium). Lab. of Inorganic Analytical Chemistry, Dept. of Chemistry
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; Fonds pour la Formation à la Recherche dans l’Industrie et l’Agriculture (FRIA); Walloon Region
OSTI Identifier:
1474846
Grant/Contract Number:  
AC05-00OR22725; 1.E056.11
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Solid State Electrochemistry
Additional Journal Information:
Journal Volume: 22; Journal Issue: 1; Journal ID: ISSN 1432-8488
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; Na₂FePO₄F; Spray-drying; Carbon black; Electrochemical properties; Energy storage; Mössbauer spectroscopy

Citation Formats

Mahmoud, Abdelfattah, Caes, Sebastien, Brisbois, Magali, Hermann, Raphaël P., Berardo, Loris, Schrijnemakers, Audrey, Malherbe, Cédric, Eppe, Gauthier, Cloots, Rudi, Vertruyen, Bénédicte, and Boschini, Frédéric. Spray-drying as a tool to disperse conductive carbon inside Na2FePO4F particles by addition of carbon black or carbon nanotubes to the precursor solution. United States: N. p., 2017. Web. doi:10.1007/s10008-017-3717-x.
Mahmoud, Abdelfattah, Caes, Sebastien, Brisbois, Magali, Hermann, Raphaël P., Berardo, Loris, Schrijnemakers, Audrey, Malherbe, Cédric, Eppe, Gauthier, Cloots, Rudi, Vertruyen, Bénédicte, & Boschini, Frédéric. Spray-drying as a tool to disperse conductive carbon inside Na2FePO4F particles by addition of carbon black or carbon nanotubes to the precursor solution. United States. doi:10.1007/s10008-017-3717-x.
Mahmoud, Abdelfattah, Caes, Sebastien, Brisbois, Magali, Hermann, Raphaël P., Berardo, Loris, Schrijnemakers, Audrey, Malherbe, Cédric, Eppe, Gauthier, Cloots, Rudi, Vertruyen, Bénédicte, and Boschini, Frédéric. Sat . "Spray-drying as a tool to disperse conductive carbon inside Na2FePO4F particles by addition of carbon black or carbon nanotubes to the precursor solution". United States. doi:10.1007/s10008-017-3717-x. https://www.osti.gov/servlets/purl/1474846.
@article{osti_1474846,
title = {Spray-drying as a tool to disperse conductive carbon inside Na2FePO4F particles by addition of carbon black or carbon nanotubes to the precursor solution},
author = {Mahmoud, Abdelfattah and Caes, Sebastien and Brisbois, Magali and Hermann, Raphaël P. and Berardo, Loris and Schrijnemakers, Audrey and Malherbe, Cédric and Eppe, Gauthier and Cloots, Rudi and Vertruyen, Bénédicte and Boschini, Frédéric},
abstractNote = {In this work, Na2FePO4F-carbon composite powders were prepared by spray-drying a solution of inorganic precursors with 10 and 20 wt% added carbon black (CB) or carbon nanotubes (CNTs). In order to compare the effect of CB and CNT when added to the precursor solutions, the structural, electrochemical, and morphological properties of the synthesized Na2FePO4F-xCB and Na2FePO4F-xCNT samples were systematically investigated. In both cases, X-ray diffraction shows that calcination at 600 °C in argon leads to the formation of Na2FePO4F as the major inorganic phase. 57Fe Mössbauer spectroscopy was used as complementary technique to probe the oxidation states, local environment, and identify the composition of the iron-containing phases. The electrochemical performance is markedly better in the case of Na2FePO4F-CNT (20 wt%), with specific capacities of about 100 mAh/g (Na2FePO4F-CNT) at C/4 rate vs. 50 mAh/g for Na2FePO4F-CB (20 wt%). SEM characterization of Na2FePO4F-CB particles revealed different particle morphologies for the Na2FePO4F-CNT and Na2FePO4F-CB powders. The carbon-poor surface observed for Na2FePO4F-CB could be due to a slow diffusion of carbon in the droplets during drying. On the contrary, Na2FePO4F-CNT shows a better CNT dispersion inside and at the surface of the NFPF particles that improves the electrochemical performance.},
doi = {10.1007/s10008-017-3717-x},
journal = {Journal of Solid State Electrochemistry},
number = 1,
volume = 22,
place = {United States},
year = {2017},
month = {8}
}

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