CFx Derived Carbon–FeF2 Nanocomposites for Reversible Lithium Storage

Authors

  • M. Anji Reddy,

    Corresponding author
    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
    • Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany.
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  • Ben Breitung,

    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
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  • Venkata Sai Kiran Chakravadhanula,

    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
    2. Helmholtz Institute Ulm (HIU), Ulm University, D-89069 Ulm, Germany
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  • Clemens Wall,

    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
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  • Michael Engel,

    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
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  • Christian Kübel,

    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
    2. Helmholtz Institute Ulm (HIU), Ulm University, D-89069 Ulm, Germany
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  • Annie K. Powell,

    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
    2. Karlsruhe Institute of Technology (KIT), Institute for Inorganic Chemistry, Engesserstrasse 15, D-76128 Karlsruhe, Germany
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  • Horst Hahn,

    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
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  • Maximilian Fichtner

    Corresponding author
    1. Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany
    2. Helmholtz Institute Ulm (HIU), Ulm University, D-89069 Ulm, Germany
    • Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, D-76021 Karlsruhe, Germany.
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Abstract

original image

A new synthesis by reactive intercalation of a functional material in one step, with no solid or liquid by-products, leads to the formation of uniform and nanoscale FeF2 crystallites (9–12 nm) which are clamped in a well conductive graphitic matrix. The composite shows superior performance for the storage of lithium and can be used as cathode material in batteries. Specific capacities of up to 418 mAh g−1 were measured at 40 °C after 25 cycles.

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