Top-down synthesis of iron fluoride/reduced graphene nanocomposite for high performance lithium-ion battery

Unravelling lithiation mechanisms of iron trifluoride by operando X-ray absorption spectroscopy and MCR-ALS chemometric tools

“…HTB-FeF 3 is obtained most of the time with water molecules stabilized in the structural channels and is not convenient for long cycling stability 4 . If many studies were conducted on hydrated HTB [5][6][7][8][9] and hydrated pyrochlore [10][11][12] , little is known about anhydrous phases. Especially, the rhombohedral structure is less studied because of the high temperature required to obtain this structure 4 , however it is also the most stable as it does not exist in an hydrated form in opposite to the other structures.…”

Functionalization Mechanism of Reduced Graphene Oxide Flakes with BF3·THF and Its Influence on Interaction with Li+ Ions in Lithium-Ion Batteries

“…Moreover, GO can be subjected to plasma [ 23 ], photochemical [ 24 ] and electrochemical [ 25 ] fluorination. Very satisfactory results are achieved during GO fluorination in hydrothermal or solvothermal processes with the use of hydrofluoric acid (HF) [ 26 ], boron trifluoride BF 3 [ 27 ] and other fluorine-containing reagents [ 4 , 28 ].…”

Porous FeF3/MWCNTs composite cathode promoting high performance aluminum storage

“…In order to strengthen and enhance its electrochemical performance, material nanofabrication and highly conductive media are used for its activation and modification. The most common way to improve performance is to compound it with carbon materials, such as reduced graphene, 15,16 carbon nanotubes, 17 conductive carbon black, etc., or to obtain carbon-coated metal fluoride nanocomposites through polymer pyrolysis. 18,19 There is also optimization of the preparation scheme, adjusting the morphology and particle size of the material, thus shortening the reaction path of ion diffusion to improve the battery performance.…”

“…FeF 3 , used as cathode material for lithium-ion batteries, has the operating voltage of 3.0 V and high theoretical capacity (237 mA h g −1 for single-electron transfer; 712 mA h g −1 for three-electron full conversion). 15 However, due to the inherent insulating properties of metal fluorides, FeF 3 exhibits only a very low practical capacity in actual measurements. In order to strengthen and enhance its electrochemical performance, material nanofabrication and highly conductive media are used for its activation and modification.…”

“…In order to strengthen and enhance its electrochemical performance, material nanofabrication and highly conductive media are used for its activation and modification. The most common way to improve performance is to compound it with carbon materials, such as reduced graphene, 15,16 carbon nanotubes, 17 conductive carbon black, etc. , or to obtain carbon-coated metal fluoride nanocomposites through polymer pyrolysis.…”