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The results of a study of the electrochemical intercalation of lithium into Lonza KS15 artificial graphite in 1M LiC104 PC/EC (50:50) electrolyte are presented here. Electrolyte decomposition reactions occur during the first discharge at about 0.8 V vs. Li metal and their extent is greatly reduced by addition of crown ethers with 12 crown 4 being most effective. A mechanism is proposed for electrolyte decomposition reactions which includes at least two types of process, namely, propylene and ethylene evolution and formation on the surface of graphite of a solid electrolyte interphase film which includes lithium alkyl carbonates. The stoichiometry of lithium intercalation into graphite is found to be inversely dependent on the cycling rates and electrode thickness and proportional to the amount of carbon black added to the graphite.

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This paper will demonstrate that cathodes based on the high temperature form of orthorhombic LiMnO2, with the structure described by Hoppe, Brachtel and Jansen, have good capacity and cycle life. X-ray diffraction studies have revealed that cathodes prepared from orthorhombic LiMnO2 undergo a structural change on being charged beyond a certain potential in which the original structure is converted to spinel Lil-xMn204. Orthorhombic LiMnO2 has been found to have long-term stability in ambient conditions and is easily prepared in a one-step reaction.

The vapor pressures over benz [a] Les pressions de vapeur du benz[a]anthracCne (B[a]A), benzo[a]pyr6ne (B[a]P), benzo[e]pyr6ne (B[elP), benzo[ghi]pCrylene (B[ghi]P) et coronene ont t t t mesurtes a I'aide de la methode de perte de poids par effusion de Knudsen. Les parametres A et B dans ]'equation log,, [~( a t m ) ]= -(A/T) + B e t les enthalpies de sublimation en kcal mol-' ainsi derives sont respectivement: B[a]A, 5925 -t 36, 10.045

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Sea spray within the lowest meter of the atmospheric surface layer was measured with an optical instrument supported on a raft. Sizes of measured droplets appear to follow a two‐segment equilibrium spectrum; the division of two size regions within the production zone (the ejection range of jet drops), however, differs from that outside. Vertical distributions of droplet concentrations vary greatly with the droplet size; critical diameters for the droplet suspension under various wind velocities are determined. The mass concentrations of droplets at various elevations were also obtained. Longitudinally, the droplets are distributed in patches, whose occurrence appears to correlate well with the frequency of dominant waves.