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    A New Intermetallic NiSn5 Phase: Induced Synthesis, Crystal Structure Resolution, and Investigation of Its Mechanism

    Editor:yingwen Date:2019-04-22 Hits:125

    Hangjun Ying,† Jianming Bai,‡ Shijun Li, Fengxia Xin,† Guangjin Wang,† Wen Wen, Xufeng Yan,† Zhen Meng,† and Wei-Qiang Han*,† [The Journal of Physical Chemistry Letters]

    ABSTRACT: Benefiting from the nanoscale effect, some metastable compounds can be synthesized in nanoparticles under normal conditions. The new intermetallic NiSn5 phase is synthesized by us for the first time by using a seed crystal induction method. This tetragonal phase in the P4/mcc space group has stoichiometric Ni atom defects, yielding Ni0.62Sn5. A study of the growth mechanism reveals that the FeSn5/CoSn5 seed crystal plays a vital role in the formation of the NiSn5 phase. An investigation of the phase evolution during lithiation/delithiation processes indicates the irreversibility of NiSn5 as an anode for lithium ion batteries.

    DOI: 10.1021/acs.jpclett.9b00704

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