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Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage

M. Anji Reddy, Ben Breitung, Venkata Sai Kiran Chakravadhanula, M. Helen, Ralf Witte, Carine Rongeat, Christian Kübel, Horst Hahn, Maximilian Fichtner, Anji Munnangi Orcid Logo

RSC Advances, Volume: 8, Issue: 64, Pages: 36802 - 36811

Swansea University Author: Anji Munnangi Orcid Logo

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DOI (Published version): 10.1039/C8RA07378C

Abstract

Transition metal fluorides are an important class of cathode materials for lithium batteries owing to their high specific energy and safety. However, metal fluorides are electrical insulators, exhibiting slow reaction kinetics with Li. Consequently, metal fluorides can show poor electrochemical perf...

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Published in: RSC Advances
ISSN: 2046-2069
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa51591
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spelling 2019-09-03T11:39:45.9500365 v2 51591 2019-08-27 Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage 3ed0b4f2ff4fb9e87c7a73e7a3c39da7 0000-0001-9101-0252 Anji Munnangi Anji Munnangi true false 2019-08-27 MTLS Transition metal fluorides are an important class of cathode materials for lithium batteries owing to their high specific energy and safety. However, metal fluorides are electrical insulators, exhibiting slow reaction kinetics with Li. Consequently, metal fluorides can show poor electrochemical performance. Instead, carbon–metal fluoride nanocomposites (CMNFCs) were suggested to enhance electrochemical activity. Chemical synthesis of CMNFCs poses particular challenges due to the poor chemical stability of metal fluorides. Recently, we reported a facile one-step method to synthesize carbon–FeF2 nanocomposites by reacting fluorinated carbon (CFx) with iron pentacarbonyl (Fe(CO)5) at 250 °C. The method resulted in C–FeF2 nanocomposites with improved electrochemical properties. Here, we have synthesized four different C–FeF2 nanocomposites by reacting four different CFx precursors made of petro-coke, carbon black, graphite, and carbon-fibers with Fe(CO)5. Electrochemical performance of all four C–FeF2 nanocomposites was evaluated at 25 °C and 40 °C. It is shown that the nature of CFx has a critical impact on the electrochemical performance of the corresponding C–FeF2 nanocomposites. The C–FeF2 nanocomposites were characterized by using various experimental techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, resistivity measurement, and 57Fe Mössbauer spectroscopy to shed light on the differences in electrochemical behaviour of different C–FeF2 nanocomposites. Journal Article RSC Advances 8 64 36802 36811 2046-2069 31 12 2018 2018-12-31 10.1039/C8RA07378C COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2019-09-03T11:39:45.9500365 2019-08-27T12:33:29.3716514 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering M. Anji Reddy 1 Ben Breitung 2 Venkata Sai Kiran Chakravadhanula 3 M. Helen 4 Ralf Witte 5 Carine Rongeat 6 Christian Kübel 7 Horst Hahn 8 Maximilian Fichtner 9 Anji Munnangi 0000-0001-9101-0252 10 0051591-03092019113935.pdf reddy2018.pdf 2019-09-03T11:39:35.2230000 Output 3385650 application/pdf Version of Record true 2019-09-03T00:00:00.0000000 false eng
title Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage
spellingShingle Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage
Anji Munnangi
title_short Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage
title_full Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage
title_fullStr Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage
title_full_unstemmed Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage
title_sort Facile synthesis of C–FeF2 nanocomposites from CFx: influence of carbon precursor on reversible lithium storage
author_id_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7
author_id_fullname_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7_***_Anji Munnangi
author Anji Munnangi
author2 M. Anji Reddy
Ben Breitung
Venkata Sai Kiran Chakravadhanula
M. Helen
Ralf Witte
Carine Rongeat
Christian Kübel
Horst Hahn
Maximilian Fichtner
Anji Munnangi
format Journal article
container_title RSC Advances
container_volume 8
container_issue 64
container_start_page 36802
publishDate 2018
institution Swansea University
issn 2046-2069
doi_str_mv 10.1039/C8RA07378C
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description Transition metal fluorides are an important class of cathode materials for lithium batteries owing to their high specific energy and safety. However, metal fluorides are electrical insulators, exhibiting slow reaction kinetics with Li. Consequently, metal fluorides can show poor electrochemical performance. Instead, carbon–metal fluoride nanocomposites (CMNFCs) were suggested to enhance electrochemical activity. Chemical synthesis of CMNFCs poses particular challenges due to the poor chemical stability of metal fluorides. Recently, we reported a facile one-step method to synthesize carbon–FeF2 nanocomposites by reacting fluorinated carbon (CFx) with iron pentacarbonyl (Fe(CO)5) at 250 °C. The method resulted in C–FeF2 nanocomposites with improved electrochemical properties. Here, we have synthesized four different C–FeF2 nanocomposites by reacting four different CFx precursors made of petro-coke, carbon black, graphite, and carbon-fibers with Fe(CO)5. Electrochemical performance of all four C–FeF2 nanocomposites was evaluated at 25 °C and 40 °C. It is shown that the nature of CFx has a critical impact on the electrochemical performance of the corresponding C–FeF2 nanocomposites. The C–FeF2 nanocomposites were characterized by using various experimental techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, resistivity measurement, and 57Fe Mössbauer spectroscopy to shed light on the differences in electrochemical behaviour of different C–FeF2 nanocomposites.
published_date 2018-12-31T04:03:33Z
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