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

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

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.

Original languageBritish English
Pages (from-to)1655-1661
Number of pages7
JournalElectrochimica Acta
Volume45
Issue number10
DOIs
StatePublished - 31 Jan 2000

Fingerprint

Dive into the research topics of 'Electrochemical behavior of graphite highly fluorinated by high oxidation state complex fluorides and elemental fluorine'. Together they form a unique fingerprint.

Cite this