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BY-NC-ND 3.0 license Open Access Published by De Gruyter June 2, 2014

LiBC – Synthesis, Electrochemical and Solid-state NMR Investigations

  • Thorsten Langer , Sven Dupke , Christian Dippel , Martin Winter , Hellmut Eckert and Rainer Pöttgen EMAIL logo

LiBC was synthesized from the elements in a sealed niobium ampoule. It represents a totally intercalated heterographite with a structural relationship to graphite, the most commonly used anode material for lithium ion batteries. Since LiBC could accommodate three times as much lithium as graphite, its electrochemical properties in the anode and the cathode voltage range were investigated. However, LiBC did show poor performance both as an anode and as a cathode material. The unfavorable characteristics of LiBC with respect to electrochemical de-lithiation and re-insertion can be rationalized on the basis of nuclear magnetic resonance results. 7Li and 6Li isotropic chemical shifts are consistent with complete ionization of the lithium species. Variable-temperature static 7Li NMR lineshapes indicate that the mobility of the lithium ions is rather restricted, even at temperatures up to 500 K. The 11B and 13C NMR parameters are consistent with those measured in sp2-hybridized boron/carbon networks and also support the ionic bonding model.

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 LiBC – Synthesis, Electrochemical and Solid-state NMR Investigations

LiBC – Synthesis, Electrochemical and Solid-state NMR Investigations

Received: 2012-8-20
Published Online: 2014-6-2
Published in Print: 2012-11-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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