Ternary metal fluorides as high-energy cathodes with low cycling hysteresis
Abstract
In this study, transition metal fluorides are an appealing alternative to conventional intercalation compounds for use as cathodes in next-generation lithium batteries due to their extremely high capacity (3–4 times greater than the current state-of-the-art). However, issues related to reversibility, energy efficiency and kinetics prevent their practical application. Here we report on the synthesis, structural and electrochemical properties of ternary metal fluorides (M1yM21-yFx: M1, M2 = Fe, Cu), which may overcome these issues. By substituting Cu into the Fe lattice, forming the solid–solution CuyFe1-yF2, reversible Cu and Fe redox reactions are achieved with surprisingly small hysteresis (<150 mV). This finding indicates that cation substitution may provide a new avenue for tailoring key electrochemical properties of conversion electrodes. In conclusion, although the reversible capacity of Cu conversion fades rapidly, likely due to Cu+ dissolution, the low hysteresis and high energy suggest that a Cu-based fluoride cathode remains an intriguing candidate for rechargeable lithium batteries.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States). Sustainable Energy Technologies Dept.
- Seoul National Univ. (Korea, Republic of). Dept. of Materials Science and Engineering; Seoul National Univ. (Korea, Republic of). Center for Nanoparticle Research
- Seoul National Univ. (Korea, Republic of). Dept. of Materials Science and Engineering; Seoul National Univ. (Korea, Republic of). Center for Nanoparticle Research
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- HRL Laboratories, LLC, Malibu, CA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Sustainable Energy Technologies Dept.; HRL Laboratories, LLC, Malibu, CA (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center on Nanostructuring for Efficient Energy Conversion (CNEEC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1229444
- Report Number(s):
- BNL-111520-2015-JA
Journal ID: ISSN 2041-1723
- Grant/Contract Number:
- SC0012704; SC0001060; SC0001294; AC02- 98CH10886
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Wang, Feng, Kim, Sung -Wook, Seo, Dong -Hwa, Kang, Kisuk, Wang, Liping, Su, Dong, Vajo, John J., Wang, John, and Gratez, Jason. Ternary metal fluorides as high-energy cathodes with low cycling hysteresis. United States: N. p., 2015.
Web. doi:10.1038/ncomms7668.
Wang, Feng, Kim, Sung -Wook, Seo, Dong -Hwa, Kang, Kisuk, Wang, Liping, Su, Dong, Vajo, John J., Wang, John, & Gratez, Jason. Ternary metal fluorides as high-energy cathodes with low cycling hysteresis. United States. https://doi.org/10.1038/ncomms7668
Wang, Feng, Kim, Sung -Wook, Seo, Dong -Hwa, Kang, Kisuk, Wang, Liping, Su, Dong, Vajo, John J., Wang, John, and Gratez, Jason. Thu .
"Ternary metal fluorides as high-energy cathodes with low cycling hysteresis". United States. https://doi.org/10.1038/ncomms7668. https://www.osti.gov/servlets/purl/1229444.
@article{osti_1229444,
title = {Ternary metal fluorides as high-energy cathodes with low cycling hysteresis},
author = {Wang, Feng and Kim, Sung -Wook and Seo, Dong -Hwa and Kang, Kisuk and Wang, Liping and Su, Dong and Vajo, John J. and Wang, John and Gratez, Jason},
abstractNote = {In this study, transition metal fluorides are an appealing alternative to conventional intercalation compounds for use as cathodes in next-generation lithium batteries due to their extremely high capacity (3–4 times greater than the current state-of-the-art). However, issues related to reversibility, energy efficiency and kinetics prevent their practical application. Here we report on the synthesis, structural and electrochemical properties of ternary metal fluorides (M1yM21-yFx: M1, M2 = Fe, Cu), which may overcome these issues. By substituting Cu into the Fe lattice, forming the solid–solution CuyFe1-yF2, reversible Cu and Fe redox reactions are achieved with surprisingly small hysteresis (<150 mV). This finding indicates that cation substitution may provide a new avenue for tailoring key electrochemical properties of conversion electrodes. In conclusion, although the reversible capacity of Cu conversion fades rapidly, likely due to Cu+ dissolution, the low hysteresis and high energy suggest that a Cu-based fluoride cathode remains an intriguing candidate for rechargeable lithium batteries.},
doi = {10.1038/ncomms7668},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {Thu Mar 26 00:00:00 EDT 2015},
month = {Thu Mar 26 00:00:00 EDT 2015}
}
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