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Phosphate structure and lithium environments in lithium phosphorus oxynitride amorphous thin films

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Abstract

Lithium ion-conducting glasses attract wide interest for electrochemical applications like efficient energy storage devices. This work presents a structural study on involved bonding units, based on X-ray photoelectron spectroscopy and infrared spectroscopy, of lithium phosphorus oxide and oxynitride amorphous thin films prepared by RF magnetron sputtering. A thorough consideration of the mid- and far-infrared spectral regions demonstrated structural changes at the phosphate units and the lithium ion environments triggered by nitrogen incorporation and post-deposition thermal treatment. It was found that films prepared by sputtering in pure nitrogen atmosphere have about 75 % of their nitrogen atoms in sites doubly coordinated with phosphorus (P–N=P), and the rest in triply coordinated sites. It was shown also that nitrogen incorporation favors the stability of lithium ions, while annealing enhances ionic conductivity of the oxynitride films.

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Authors and Affiliations

  1. Technische Universität Darmstadt, Materials Science Department, Surface Science Division, Jovanka-Bontschits-Str. 2, 64287, Darmstadt, Germany

    M. A. Carrillo Solano, R. Hausbrand & W. Jaegermann

  2. University of Bordeaux, ICMCB, CNRS UPR 9048, F-33600, Pessac, France

    M. A. Carrillo Solano, P. Vinatier & L. Croguennec

  3. University of Bordeaux, ISM, CNRS UMR 5255, F-33405, Talence, France

    M. Dussauze

  4. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635, Athens, Greece

    E. I. Kamitsos

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  1. M. A. Carrillo Solano
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  2. M. Dussauze
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  3. P. Vinatier
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  5. E. I. Kamitsos
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Correspondence to M. A. Carrillo Solano or M. Dussauze.

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Carrillo Solano, M.A., Dussauze, M., Vinatier, P. et al. Phosphate structure and lithium environments in lithium phosphorus oxynitride amorphous thin films. Ionics 22, 471–481 (2016). https://doi.org/10.1007/s11581-015-1573-1

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