by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC], [Springfield, Va .
Written in English
|Series||NASA technical memorandum -- 106447.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
Discharge characteristics of graphite fluoride prepared via graphite intercalation compounds. Discharge characteristics of (CF)n prepared from residual carbon obtained by thermal decomposition of graphite fluoride and graphite oxide. 6. Graphite Fluoride Film on Metallic Aluminum. Electrochemical fluorination in hydrogen fluoride Edition: 1. Unreacted fluorine gas was made to react with soda lime. Graphite intercalation compounds prepared were analyzed by means of X-ray diffractometry, elemental analysis, photo- electron spectroscopy (ESCA) and differential ther- mal analysis (DTA). ESCA measurement was made by a Du Pont B Electron Spectrometer with Mg-Ka radiation. Abstract A ternary intercalation compound of graphite with AlF3 and F2, CxF(AlF3)y was prepared under fluorine atmosphere at temperatures of °C. The typical 1st stage compound has a composition of C6F(AlF3)0,15 with a repeat distance of pm. Rapid progress in the reaction led of the formation of graphite fluoride, (C2F)n. ESCA spectra indicate that the chemical bond between host. Abstract Highly oriented pyrolytic graphite was fluorinated at room temperature with molecular fluorine at atm for 8 days to 2 months without addition of any catalyst. Under these mild.
Graphit e Intercalation Compound, Graphite Fluoride A ternary intercalation compound of graphite with AIF3 and F2, C F (A1F3). The properties of graphite intercalation compounds (GIC’s) are discussed with respect to possible applications. Five families of intercalates give high electrical conductivity to GIC’s: pentafluorides leading to high conductivity, S/m (higher than metallic copper); metal chlorides; fluorine and alkali metals with bismuth giving relatively high conductivity of the order of S/m plus. Carlin et al. investigated the reductive and oxidative intercalation of ions into graphite in a single‐graphite‐electrode cell 71 and two‐graphite‐electrodes cell. 11 It was found that the cell with two graphitic electrodes in the electrolyte (DMPI + /AlCl 4 −) displayed an open circuit voltage of V with a cycling efficiency of The intercalation compounds graphite bisulfate and graphite perchlorate can be prepared by treating graphite with strong oxidizing agents in the presence of strong acids. In contrast to the potassium and calcium graphites, the carbon layers are oxidized in this process: 48 C + O 2 + 3 H 2 SO 4 → [C 24] + [HSO 4] − 2H 2 SO 4 + H 2 O.
The importance of carbon-fluorine compounds as battery materials was first recognized by graphite fluoride cathode of Li/ (CF)n battery. Furthermore, new graphite anode for . Graphite fluoride is a kind of graphite intercalation compounds (GICs). Table shows classification of GICs, which are classified in two categories, that is, those with covalent and ionic bonds between host graphite and guest species. GICs with covalent bonds are graphite fluorides and graphite oxide (recently called graphene oxide). The decomposition of C x FCl y zR (R = N2O4, N2O, SO2) fluorinated graphite intercalation compounds at – K leads to the formation of C x FCl y graphite fluorides with x close to 2 and y close to The C x FCl y fluorides are first-stage compounds with an interlayer spacing of – nm. According to the synthesis conditions and their structure, these compounds can be classed. Graphite–fluorine intercalation compounds with the general formula CF (x > 2) have been prepared, having basal plane conductivities comparable to the highest conductivity among known intercalation compounds.