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The electrochemical reactivity of the NiP3 skutterudite-type phase with lithium

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Abstract

We report the electrochemical Li reactivity of the cubic NiP3 phase, a candidate for anode applications for Li-ion batteries. NiP3 reacts with nine lithium per formula unit leading to a first cycle reversible capacity of 1,475 mAh/g at an average potential of 0.9 V vs. Li+/Li°. Electrochemical measurements and complementary X-ray diffraction showed that NiP3 presents a conversion process \( {\left( {{\text{NiP}}_{{\text{3}}} {\text{ + 9 Li}}^{ + } {\text{ + 9e}}^{ - } \to {\text{ Ni $ ^\circ $ + 3Li}}_{{\text{3}}} {\text{P}}} \right)} \) competing with an insertion process. A good cycleability may only be obtained on a limited potential window, excluding the low-potential region.

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Acknowledgements

Authors thank M.L. Doublet and J. Bernardi for helpful discussion and the Agence de l’Environnement et de la Maîtrise de l’Energie for financial support.

This research was performed in the framework of Advanced Lithium Energy Storage Systems Network of Excellence (contract N° SES6-CT-2003-503532) founded by the European Commission.

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Authors and Affiliations

  1. Institut Charles Gerhardt, AIME, CNRS, Université Montpellier II, Montpelier, France

    S. Boyanov & L. Monconduit

  2. LRCS–CNRS, Université de Picardie Jules Verne, Amiens, France

    F. Gillot

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  1. S. Boyanov
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  2. F. Gillot
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  3. L. Monconduit
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Correspondence to L. Monconduit.

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Boyanov, S., Gillot, F. & Monconduit, L. The electrochemical reactivity of the NiP3 skutterudite-type phase with lithium. Ionics 14, 125–130 (2008). https://doi.org/10.1007/s11581-007-0190-z

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  • DOI: https://doi.org/10.1007/s11581-007-0190-z

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