Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine

T. Nakajima; M. Koh; V. Gupta; B. Žemva; K. Lutar

doi:10.1016/S0013-4686(99)00389-8

Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine

T. Nakajima, M. Koh, V. Gupta, B. Žemva, K. Lutar

Physics

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

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Abstract

Highly fluorinated graphites have been synthesized by using elemental fluorine under pressure and high oxidation state complex fluoride, K₂NiF₆ or KAgF₄ in anhydrous hydrogen fluoride. Their electrochemical discharge as a cathode of primary lithium battery has been investigated in organic electrolyte solution. Main products were stage 1 compounds or the stage 1 involving stage 2 and 3 phases as minor components with approximate compositions of C_1.6F. X-ray photoelectron spectra indicated the existence of nearly semi-ionic C-F bonds. Electrochemical studies demonstrated that the C_xF samples prepared using KAgF₄ and elemental fluorine exhibited high and flat discharge potentials of 3.2 V versus Li/Li⁺ and discharge capacities of approximately 500 mA h g^-1 at cut-off potential 1.5 V.

Original language	British English
Pages (from-to)	1655-1661
Number of pages	7
Journal	Electrochimica Acta
Volume	45
Issue number	10
DOIs	https://doi.org/10.1016/S0013-4686(99)00389-8
State	Published - 31 Jan 2000

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10.1016/S0013-4686(99)00389-8

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@article{a088606d973f4f6a93afa617bcdeb013,

title = "Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine",

abstract = "Highly fluorinated graphites have been synthesized by using elemental fluorine under pressure and high oxidation state complex fluoride, K2NiF6 or KAgF4 in anhydrous hydrogen fluoride. Their electrochemical discharge as a cathode of primary lithium battery has been investigated in organic electrolyte solution. Main products were stage 1 compounds or the stage 1 involving stage 2 and 3 phases as minor components with approximate compositions of C1.6F. X-ray photoelectron spectra indicated the existence of nearly semi-ionic C-F bonds. Electrochemical studies demonstrated that the CxF samples prepared using KAgF4 and elemental fluorine exhibited high and flat discharge potentials of 3.2 V versus Li/Li+ and discharge capacities of approximately 500 mA h g-1 at cut-off potential 1.5 V.",

author = "T. Nakajima and M. Koh and V. Gupta and B. {\v Z}emva and K. Lutar",

note = "Funding Information: V. Gupta would like to thank the Japan Society for the Promotion of Science for JSPS fellowship. The present study was financially supported by a Grant-in-Aid for {\textquoteleft}Research for the Future{\textquoteright} Program (nanocarbon) of the Japan Society for the Promotion of Science.",

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doi = "10.1016/S0013-4686(99)00389-8",

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TY - JOUR

T1 - Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine

AU - Nakajima, T.

AU - Koh, M.

AU - Gupta, V.

AU - Žemva, B.

AU - Lutar, K.

N1 - Funding Information: V. Gupta would like to thank the Japan Society for the Promotion of Science for JSPS fellowship. The present study was financially supported by a Grant-in-Aid for ‘Research for the Future’ Program (nanocarbon) of the Japan Society for the Promotion of Science.

PY - 2000/1/31

Y1 - 2000/1/31

N2 - Highly fluorinated graphites have been synthesized by using elemental fluorine under pressure and high oxidation state complex fluoride, K2NiF6 or KAgF4 in anhydrous hydrogen fluoride. Their electrochemical discharge as a cathode of primary lithium battery has been investigated in organic electrolyte solution. Main products were stage 1 compounds or the stage 1 involving stage 2 and 3 phases as minor components with approximate compositions of C1.6F. X-ray photoelectron spectra indicated the existence of nearly semi-ionic C-F bonds. Electrochemical studies demonstrated that the CxF samples prepared using KAgF4 and elemental fluorine exhibited high and flat discharge potentials of 3.2 V versus Li/Li+ and discharge capacities of approximately 500 mA h g-1 at cut-off potential 1.5 V.

AB - Highly fluorinated graphites have been synthesized by using elemental fluorine under pressure and high oxidation state complex fluoride, K2NiF6 or KAgF4 in anhydrous hydrogen fluoride. Their electrochemical discharge as a cathode of primary lithium battery has been investigated in organic electrolyte solution. Main products were stage 1 compounds or the stage 1 involving stage 2 and 3 phases as minor components with approximate compositions of C1.6F. X-ray photoelectron spectra indicated the existence of nearly semi-ionic C-F bonds. Electrochemical studies demonstrated that the CxF samples prepared using KAgF4 and elemental fluorine exhibited high and flat discharge potentials of 3.2 V versus Li/Li+ and discharge capacities of approximately 500 mA h g-1 at cut-off potential 1.5 V.

UR - http://www.scopus.com/inward/record.url?scp=0033876885&partnerID=8YFLogxK

U2 - 10.1016/S0013-4686(99)00389-8

DO - 10.1016/S0013-4686(99)00389-8

M3 - Article

AN - SCOPUS:0033876885

SN - 0013-4686

VL - 45

SP - 1655

EP - 1661

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 10

ER -

Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine

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