Electrochemical Properties of Nitrogen-Substituted Carbon and Organofluorine Compounds

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<jats:title>ABSTRACT</jats:title><jats:p>The C<jats:sub>x</jats:sub>N samples(C<jats:sub>14</jats:sub>N-C<jats:sub>62</jats:sub>N) prepared with a nickel catalyst had the higher crystallinity and less pyridine-type nitrogens existing at the edge of graphene layers than C<jats:sub>x</jats:sub>N prepared in the absence of a catalyst. With increase in the deposition temperature of C<jats:sub>x</jats:sub>N, the cy-cleability for electrochemical intercalation-deintercalation of lithium ions was improved and the profile of the charge-discharge curve approached that of graphite due to increase in the crystallinity and decrease in the incorporated nitrogens. C<jats:sub>x</jats:sub>N-coated graphites demonstrated gradual increase in the potential at the last stage of lithium ion deintercalation process.</jats:p><jats:p>The effect of fluoroester-mixing in 1 M LiClO<jats:sub>4</jats:sub>-EC/DEC was also investigated at a low temperature. It was found that CHF<jats:sub>2</jats:sub>COOCH<jats:sub>3</jats:sub> with a low molecular weight and a small number of fluorine atoms was effective as a mixing agent.</jats:p>

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  • MRS Proceedings

    MRS Proceedings 496 1997-01-01

    Springer Science and Business Media LLC

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