Ternary metal fluorides as high-energy cathodes with low cycling hysteresis
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 effici...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2015
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| Online Access: | http://hdl.handle.net/1721.1/97211 https://orcid.org/0000-0002-7200-7186 |
| _version_ | 1811073584698753024 |
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| author | Wang, Feng Kim, Sung-Wook Seo, Dong-Hwa Kang, Kisuk Wang, Liping Su, Dong Vajo, John J. Wang, John Graetz, Jason |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Wang, Feng Kim, Sung-Wook Seo, Dong-Hwa Kang, Kisuk Wang, Liping Su, Dong Vajo, John J. Wang, John Graetz, Jason |
| author_sort | Wang, Feng |
| collection | MIT |
| description | 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 (M[1 over y]M[2 over 1-y]F[subscript x]: M[superscript 1], M[superscript 2]=Fe, Cu), which may overcome these issues. By substituting Cu into the Fe lattice, forming the solid–solution Cu[subscript y]Fe[subscript 1-y]F[subscript 2], 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. Although the reversible capacity of Cu conversion fades rapidly, likely due to Cu[superscript +] dissolution, the low hysteresis and high energy suggest that a Cu-based fluoride cathode remains an intriguing candidate for rechargeable lithium batteries. |
| first_indexed | 2024-09-23T09:35:18Z |
| format | Article |
| id | mit-1721.1/97211 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:35:18Z |
| publishDate | 2015 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/972112022-09-30T15:28:47Z Ternary metal fluorides as high-energy cathodes with low cycling hysteresis Wang, Feng Kim, Sung-Wook Seo, Dong-Hwa Kang, Kisuk Wang, Liping Su, Dong Vajo, John J. Wang, John Graetz, Jason Massachusetts Institute of Technology. Department of Materials Science and Engineering Seo, Dong-Hwa 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 (M[1 over y]M[2 over 1-y]F[subscript x]: M[superscript 1], M[superscript 2]=Fe, Cu), which may overcome these issues. By substituting Cu into the Fe lattice, forming the solid–solution Cu[subscript y]Fe[subscript 1-y]F[subscript 2], 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. Although the reversible capacity of Cu conversion fades rapidly, likely due to Cu[superscript +] dissolution, the low hysteresis and high energy suggest that a Cu-based fluoride cathode remains an intriguing candidate for rechargeable lithium batteries. 2015-06-08T14:36:15Z 2015-06-08T14:36:15Z 2015-03 2014-12 Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/97211 Wang, Feng, Sung-Wook Kim, Dong-Hwa Seo, Kisuk Kang, Liping Wang, Dong Su, John J. Vajo, John Wang, and Jason Graetz. “Ternary Metal Fluorides as High-Energy Cathodes with Low Cycling Hysteresis.” Nature Communications 6 (March 26, 2015): 6668. © 2015 Macmillan Publishers Limited https://orcid.org/0000-0002-7200-7186 en_US http://dx.doi.org/10.1038/ncomms7668 Nature Communications Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature Publishing Group |
| spellingShingle | Wang, Feng Kim, Sung-Wook Seo, Dong-Hwa Kang, Kisuk Wang, Liping Su, Dong Vajo, John J. Wang, John Graetz, Jason Ternary metal fluorides as high-energy cathodes with low cycling hysteresis |
| title | Ternary metal fluorides as high-energy cathodes with low cycling hysteresis |
| title_full | Ternary metal fluorides as high-energy cathodes with low cycling hysteresis |
| title_fullStr | Ternary metal fluorides as high-energy cathodes with low cycling hysteresis |
| title_full_unstemmed | Ternary metal fluorides as high-energy cathodes with low cycling hysteresis |
| title_short | Ternary metal fluorides as high-energy cathodes with low cycling hysteresis |
| title_sort | ternary metal fluorides as high energy cathodes with low cycling hysteresis |
| url | http://hdl.handle.net/1721.1/97211 https://orcid.org/0000-0002-7200-7186 |
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