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Electrochemical synthesis of carbon-metal fluoride nanocomposites as cathode materials for lithium batteries / M. Helen; Maximilian Fichtner; Anji Munnangi

Electrochemistry Communications, Volume: 120, Start page: 106846

Swansea University Author: Anji, Munnangi

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Abstract

Herein we have demonstrated an electrochemical method for the synthesis of carbon-metal fluoride nanocomposites (CMNFCs). Electrochemical intercalation of transition metal ions into graphite fluoride (CFx) resulted in the formation of CMNFCs. As a proof-of-concept, we have synthesized C-FeF2 and C-N...

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Published in: Electrochemistry Communications
ISSN: 1388-2481
Published: Elsevier BV 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa55323
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Abstract: Herein we have demonstrated an electrochemical method for the synthesis of carbon-metal fluoride nanocomposites (CMNFCs). Electrochemical intercalation of transition metal ions into graphite fluoride (CFx) resulted in the formation of CMNFCs. As a proof-of-concept, we have synthesized C-FeF2 and C-NiF2 nanocomposites by the electrochemical intercalation of Fe2+ and Ni2+ into CFx from corresponding non-aqueous electrolytes. The C-FeF2 and C-NiF2 nanocomposites synthesized by this method showed high reversible capacity and cycling stability compared to chemically synthesized analogs as cathode materials for lithium batteries. The reversible capacity of chemically synthesized C-FeF2 is 181 mAh g-1, whereas electrochemically synthesized material is 349 mAh g-1 after 20 cycles. The better cycling performance of electrochemically synthesized C-FeF2 was attributed to the homogeneous distribution of FeF2 nanoparticles within the carbon matrix enabled by the electrochemical intercalation of Fe2+. The electrochemical method described here is emission-free, cost-effective, occurs at room temperature, and extendable to the synthesis of several other CMFNCs. Moreover, it might provide new avenues for the synthesis of advanced functional materials.
Keywords: CFx, metal fluorides, C-FeF2 and C-NiF2, lithium batteries
College: College of Engineering
Start Page: 106846