Post by williamplayer on Jan 15, 2014 12:24:24 GMT
Journal of Materials Chemistry A
Tunable Electrochemical Properties of Fluorinated Graphene
Functionalized graphene sheets (FGSs) with extraordinary properties such as lightweight, high in-plane conductivity and mechanical strength are an ideal material for various applications. Halogenation of graphene with chlorine, bromine, or iodine by thermal exfoliation in gaseous halogen atmospheres has been recently reported by Pumera et al. The halogen atoms were successfully anchored to the graphene surface that functions as building blocks for potential applications in electronic
and electrochemical devices. Fluorination of graphene has also been studied to improve the graphene properties for optics and electronics. For example, Sahin et al.
studied structural properties of CnF using theoretical calculations and Raman analysis. The discrepancy between experiments and calculations was attributed to the use of weighted average data for CnF structures in experiments. However, changes in properties of CnF materials at various n values have not been thoroughly
investigated which may lead to the identication of more interesting CnF materials for electronics and energy storage applications. So far, there is no experimental report on the electrochemical performance of graphene fluorides, which may also provide new critical information on the structure of fluorinated graphene. In fact,
fluorinated carbon (CFx) is a high capacity cathode for primary lithium batteries. Li/CFx batteries have the highest theoretical specific capacity (864 mA h g -1; x=
1.0) of the primary battery systems. Therefore, it is important to explore the relationship between the fluorine content on graphene and the final electrochemical performances of graphene fluorides.
Read Full Article: jsats.pnnl.gov/Publications/Peer/2013/2013_Meduri_etal_CFx_JMC_Cover.pdf
Tunable Electrochemical Properties of Fluorinated Graphene
Functionalized graphene sheets (FGSs) with extraordinary properties such as lightweight, high in-plane conductivity and mechanical strength are an ideal material for various applications. Halogenation of graphene with chlorine, bromine, or iodine by thermal exfoliation in gaseous halogen atmospheres has been recently reported by Pumera et al. The halogen atoms were successfully anchored to the graphene surface that functions as building blocks for potential applications in electronic
and electrochemical devices. Fluorination of graphene has also been studied to improve the graphene properties for optics and electronics. For example, Sahin et al.
studied structural properties of CnF using theoretical calculations and Raman analysis. The discrepancy between experiments and calculations was attributed to the use of weighted average data for CnF structures in experiments. However, changes in properties of CnF materials at various n values have not been thoroughly
investigated which may lead to the identication of more interesting CnF materials for electronics and energy storage applications. So far, there is no experimental report on the electrochemical performance of graphene fluorides, which may also provide new critical information on the structure of fluorinated graphene. In fact,
fluorinated carbon (CFx) is a high capacity cathode for primary lithium batteries. Li/CFx batteries have the highest theoretical specific capacity (864 mA h g -1; x=
1.0) of the primary battery systems. Therefore, it is important to explore the relationship between the fluorine content on graphene and the final electrochemical performances of graphene fluorides.
Read Full Article: jsats.pnnl.gov/Publications/Peer/2013/2013_Meduri_etal_CFx_JMC_Cover.pdf