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Facile Synthesis of Carbon–Metal Fluoride Nanocomposites for Lithium‐Ion Batteries
Author(s) -
Reddy M. Anji,
Breitung Ben,
Wall Clemens,
Trivedi Shivam,
Chakravadhanula Venkata Sai Kiran,
Helen M.,
Fichtner Maximilian
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500358
Subject(s) - nanocomposite , lithium (medication) , fluoride , materials science , graphite , carbon fibers , inorganic chemistry , oxide , metal , chemical engineering , nanotechnology , chemistry , composite number , composite material , metallurgy , medicine , endocrinology , engineering
Metal‐fluoride‐based conversion materials have gained interest as cathode materials for lithium‐ion batteries due to their high theoretical energy densities. However, metal fluorides are electrically insulating and experience large volume changes during the charge and discharge processes. Effective synthesis of carbon–metal fluoride nanocomposites (CMFNCs) with stable morphology is one of the keys to achieve high capacities with sustainable cycle life. A general method for the synthesis of CMFNCs is described here. The redox‐mediated reaction between CF x and metal‐carbonyl precursors at relatively low temperatures leads to the formation of the respective CMFNCs. The reaction mechanism for the formation of CF x ‐derived C–FeF 2 nanocomposites has been investigated. Also, the synthesis and lithium‐storage properties of C–CoF 2 and C–MoF 3 nanocomposites are reported. In addition, by changing from CF x to graphite oxide and sulfur‐infused porous carbon, the synthesis of C–FeO x and C–FeS nanocomposites is reported.