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The Electrochemistry of Germanium Nitride Versus Lithium

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Abstract

Germanium nitride (Ge3N4) was examined as a potential negative electrode material for Li-ion batteries. The electrochemistry of Ge3N4 versus Li showed high reversible capacity (500mAh/g) and good capacity retention during cycling. A combination of ex-situ and in-situ x-ray diffraction (XRD), ex-situ transmission electron microscopy (TEM) and ex-situ selective area electron diffraction (SAED) analyses revealed evidence supporting the conversion of a layer of Ge3N4 crystal into an amorphous Li3N+LixGe nanocomposite during the first lithiation. The nanocomposite was electrochemically active via a reversible Li-Ge alloying reaction while a core of unreacted Ge3N4 crystal remained inactive. The lithium/metal nitride conversion reaction process was kinetically hindered resulting in limited capacity. Mechanical milling was found to improve the material capacity.

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Authors and Affiliations

  1. Telcordia Technologies, 07701, Red Bank, NJ, USA

    N. Pereira & G. G. Amatucci

  2. Rutgers University, 08854, Piscataway, NJ, USA

    N. Pereira & L. C. Klein

  3. Brookhaven National Laboratory, 11973, Upton, NY, USA

    M. Balasubramanian & J. McBreen

  4. Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, 80039, Amiens, France

    L. Dupont

Authors
  1. N. Pereira
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  2. M. Balasubramanian
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  3. L. Dupont
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  4. J. McBreen
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  5. L. C. Klein
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  6. G. G. Amatucci
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Correspondence to N. Pereira.

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Pereira, N., Balasubramanian, M., Dupont, L. et al. The Electrochemistry of Germanium Nitride Versus Lithium. MRS Online Proceedings Library 756, 82 (2002). https://doi.org/10.1557/PROC-756-EE8.2

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  • DOI: https://doi.org/10.1557/PROC-756-EE8.2

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