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Electrochemical Cycling and Lithium Insertion in Nanostructured FeF_3 Cathodes

Tan, H. J. and Smith, Hillary L. and Kim, L. and Harding, Trina K. and Jones, Simon C. and Fultz, B. (2014) Electrochemical Cycling and Lithium Insertion in Nanostructured FeF_3 Cathodes. Journal of the Electrochemical Society, 161 (3). A445-A449. ISSN 0013-4651. doi:10.1149/2.096403jes.

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The cycle lives for cathodes of nanocrystalline iron trifluoride (FeF_3) were measured in rechargeable lithium batteries at different depths of discharge. When the discharge was limited to less than one Li^+ ion per FeF_3, both the cycle life and energy efficiency were considerably greater than when converting FeF_3 into Fe and LiF in deep discharge. An in situ X-ray diffractometry (XRD) study of the FeF_3 cathode during its initial discharge to LiFeF_3 showed a continuous change of the FeF_3 diffraction pattern, indicating Li^+ insertion into the rhombohedral FeF_3 causing distortion of its lattice parameters. Electrochemical cycling is most reversible when this mechanism occurs in the absence of other changes in the crystal structure.

Item Type:Article
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Jones, Simon C.0000-0002-1952-3720
Fultz, B.0000-0002-6364-8782
Alternate Title:Electrochemical Cycling and Lithium Insertion in Nanostructured FeF3 Cathodes
Additional Information:© 2014 The Electrochemical Society. Manuscript submitted September 23, 2013; revised manuscript received December 30, 2013. Published January 16, 2014. The authors thank Dr. Ratnakumar Bugga at NASA Jet Propulsion Lab, Dr. Ilias Belharouak at Argonne National Lab, Dr. Meng Jiang at General Motors for insightful discussions, and Dr. Cedric Weiss at Contour for experimental assistance with the in situ apparatus. This work was supported as part of EFree, an Energy Frontier Research Center, under Award No. DE-SG0001057.
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Department of Energy (DOE) Energy Frontier Research CenterDE-SG0001057
Issue or Number:3
Record Number:CaltechAUTHORS:20140407-104908427
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Official Citation:H. J. Tan, Hillary L. Smith, L. Kim, Trina K. Harding, Simon C. Jones, and B. Fultz Electrochemical Cycling and Lithium Insertion in Nanostructured FeF3 Cathodes J. Electrochem. Soc. 2014 161(3): A445-A449; doi:10.1149/2.096403jes
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44690
Deposited By: Ruth Sustaita
Deposited On:07 Apr 2014 18:16
Last Modified:10 Nov 2021 16:55

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