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Title: Role of precursor chemistry in the direct fluorination to form titanium based conversion anodes for lithium ion batteries

Abstract

In this study, a new synthetic route for the formation of titanium oxydifluoride (TiOF2) through the process of direct fluorination via a fluidized bed reactor system and the associated electrochemical properties of the powders formed from this approach are reported. The flexibility of this synthetic route was demonstrated using precursor powders of titanium dioxide (TiO2) nanoparticles, as well as a reduced TiOxNy. An advantage of this synthetic method is the ability to directly control the extent of fluorination as a function of reaction temperature and time. The reversible capacity of TiOF2 anodes was found to depend greatly upon the precursor employed. The TiOF2 synthesized from TiO2 and TiOxNy showed reversible capacities of 300 mAh g-1 and 440 mAh g-1, respectively, over 100 cycles. The higher reversible capacity of the TiOF2 powders derived from TiOxNy likely relate to the partial reduction of the Ti in the fluorinated electrode material, highlighting a route to optimize the properties of conversion electrode materials.

Authors:
 [1];  [2];  [3];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1244191
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
RSC Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 108; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; lithium ion; BET; battery; anode; fluorination

Citation Formats

Adcock, Jamie, Dai, Sheng, Veith, Gabriel M., Bridges, Craig A., and Powell, Jonathan M. Role of precursor chemistry in the direct fluorination to form titanium based conversion anodes for lithium ion batteries. United States: N. p., 2015. Web. doi:10.1039/C5RA17258F.
Adcock, Jamie, Dai, Sheng, Veith, Gabriel M., Bridges, Craig A., & Powell, Jonathan M. Role of precursor chemistry in the direct fluorination to form titanium based conversion anodes for lithium ion batteries. United States. https://doi.org/10.1039/C5RA17258F
Adcock, Jamie, Dai, Sheng, Veith, Gabriel M., Bridges, Craig A., and Powell, Jonathan M. 2015. "Role of precursor chemistry in the direct fluorination to form titanium based conversion anodes for lithium ion batteries". United States. https://doi.org/10.1039/C5RA17258F. https://www.osti.gov/servlets/purl/1244191.
@article{osti_1244191,
title = {Role of precursor chemistry in the direct fluorination to form titanium based conversion anodes for lithium ion batteries},
author = {Adcock, Jamie and Dai, Sheng and Veith, Gabriel M. and Bridges, Craig A. and Powell, Jonathan M.},
abstractNote = {In this study, a new synthetic route for the formation of titanium oxydifluoride (TiOF2) through the process of direct fluorination via a fluidized bed reactor system and the associated electrochemical properties of the powders formed from this approach are reported. The flexibility of this synthetic route was demonstrated using precursor powders of titanium dioxide (TiO2) nanoparticles, as well as a reduced TiOxNy. An advantage of this synthetic method is the ability to directly control the extent of fluorination as a function of reaction temperature and time. The reversible capacity of TiOF2 anodes was found to depend greatly upon the precursor employed. The TiOF2 synthesized from TiO2 and TiOxNy showed reversible capacities of 300 mAh g-1 and 440 mAh g-1, respectively, over 100 cycles. The higher reversible capacity of the TiOF2 powders derived from TiOxNy likely relate to the partial reduction of the Ti in the fluorinated electrode material, highlighting a route to optimize the properties of conversion electrode materials.},
doi = {10.1039/C5RA17258F},
url = {https://www.osti.gov/biblio/1244191}, journal = {RSC Advances},
issn = {2046-2069},
number = 108,
volume = 5,
place = {United States},
year = {Tue Oct 13 00:00:00 EDT 2015},
month = {Tue Oct 13 00:00:00 EDT 2015}
}

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Cited by: 11 works
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Fluorination of MXene by Elemental F 2 as Electrode Material for Lithium‐Ion Batteries
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