Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery

J. Li; K. Naga; Y. Ohzawa; T. Nakajima; A. I. Shames; A. M. Panich

doi:10.1016/j.jfluchem.2004.09.034

Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery

J. Li, K. Naga, Y. Ohzawa, T. Nakajima, A. I. Shames, A. M. Panich

Department of Physics

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

Surface structure change and electrochemical behavior of fluorinated petroleum coke samples (petroleum cokes: petroleum coke and those heat-treated at 1860°C, 2300°C and 2800°C, abbreviated to PC, PC1860, PC2300 and PC2800, respectively) have been investigated. Surface oxygen of petroleum coke was decreased by the fluorination using elemental fluorine. Raman and EPR spectroscopies revealed that surface fluorination increased surface disorder and lattice defects. ¹⁹F NMR spectrum suggests that distribution of fluorine atoms in PC fluorinated 300°C was similar to that in graphite fluoride with covalent CF bonds. Surface areas of fluorinated petroleum cokes were nearly the same as those of non-fluorinated ones or only slightly increased by fluorination, except PC fluorinated at 300°C. It is noted that first coulombic efficiencies of PC2300 and PC2800 were highly increased to 80-84% by the fluorination at 300°C. These values of 80-84% were 12-18% higher than those of non-fluorinated PC2300 and PC2800.

Original language	English
Pages (from-to)	265-273
Number of pages	9
Journal	Journal of Fluorine Chemistry
Volume	126
Issue number	2
DOIs	https://doi.org/10.1016/j.jfluchem.2004.09.034
State	Published - 1 Jan 2005

Keywords

Fluorinated carbon
Fluorination
Lithium rechargeable battery
Surface modification

ASJC Scopus subject areas

Biochemistry
Environmental Chemistry
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jfluchem.2004.09.034

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title = "Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery",

abstract = "Surface structure change and electrochemical behavior of fluorinated petroleum coke samples (petroleum cokes: petroleum coke and those heat-treated at 1860°C, 2300°C and 2800°C, abbreviated to PC, PC1860, PC2300 and PC2800, respectively) have been investigated. Surface oxygen of petroleum coke was decreased by the fluorination using elemental fluorine. Raman and EPR spectroscopies revealed that surface fluorination increased surface disorder and lattice defects. 19F NMR spectrum suggests that distribution of fluorine atoms in PC fluorinated 300°C was similar to that in graphite fluoride with covalent CF bonds. Surface areas of fluorinated petroleum cokes were nearly the same as those of non-fluorinated ones or only slightly increased by fluorination, except PC fluorinated at 300°C. It is noted that first coulombic efficiencies of PC2300 and PC2800 were highly increased to 80-84% by the fluorination at 300°C. These values of 80-84% were 12-18% higher than those of non-fluorinated PC2300 and PC2800.",

keywords = "Fluorinated carbon, Fluorination, Lithium rechargeable battery, Surface modification",

author = "J. Li and K. Naga and Y. Ohzawa and T. Nakajima and Shames, {A. I.} and Panich, {A. M.}",

note = "Funding Information: The present study is partly supported by a grant of the Frontier Research Project “Materials for the 21st Century—Materials Development for Environment, Energy and Information” (for 2002–2006 fiscal years) from Ministry of Education, Culture, Sports, Science and Technology. Fluorine gas used in this study was supplied by the courtesy of Daikin Industries, Ltd. The authors gratefully acknowledge them.",

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T1 - Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery

AU - Li, J.

AU - Naga, K.

AU - Ohzawa, Y.

AU - Nakajima, T.

AU - Shames, A. I.

AU - Panich, A. M.

N1 - Funding Information: The present study is partly supported by a grant of the Frontier Research Project “Materials for the 21st Century—Materials Development for Environment, Energy and Information” (for 2002–2006 fiscal years) from Ministry of Education, Culture, Sports, Science and Technology. Fluorine gas used in this study was supplied by the courtesy of Daikin Industries, Ltd. The authors gratefully acknowledge them.

PY - 2005/1/1

Y1 - 2005/1/1

N2 - Surface structure change and electrochemical behavior of fluorinated petroleum coke samples (petroleum cokes: petroleum coke and those heat-treated at 1860°C, 2300°C and 2800°C, abbreviated to PC, PC1860, PC2300 and PC2800, respectively) have been investigated. Surface oxygen of petroleum coke was decreased by the fluorination using elemental fluorine. Raman and EPR spectroscopies revealed that surface fluorination increased surface disorder and lattice defects. 19F NMR spectrum suggests that distribution of fluorine atoms in PC fluorinated 300°C was similar to that in graphite fluoride with covalent CF bonds. Surface areas of fluorinated petroleum cokes were nearly the same as those of non-fluorinated ones or only slightly increased by fluorination, except PC fluorinated at 300°C. It is noted that first coulombic efficiencies of PC2300 and PC2800 were highly increased to 80-84% by the fluorination at 300°C. These values of 80-84% were 12-18% higher than those of non-fluorinated PC2300 and PC2800.

AB - Surface structure change and electrochemical behavior of fluorinated petroleum coke samples (petroleum cokes: petroleum coke and those heat-treated at 1860°C, 2300°C and 2800°C, abbreviated to PC, PC1860, PC2300 and PC2800, respectively) have been investigated. Surface oxygen of petroleum coke was decreased by the fluorination using elemental fluorine. Raman and EPR spectroscopies revealed that surface fluorination increased surface disorder and lattice defects. 19F NMR spectrum suggests that distribution of fluorine atoms in PC fluorinated 300°C was similar to that in graphite fluoride with covalent CF bonds. Surface areas of fluorinated petroleum cokes were nearly the same as those of non-fluorinated ones or only slightly increased by fluorination, except PC fluorinated at 300°C. It is noted that first coulombic efficiencies of PC2300 and PC2800 were highly increased to 80-84% by the fluorination at 300°C. These values of 80-84% were 12-18% higher than those of non-fluorinated PC2300 and PC2800.

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Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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