TY - DATA T1 - Silicon Diphosphide: A Si-Based Three-Dimensional Crystalline Framework as a High-Performance Li-Ion Battery Anode PY - 2016/05/31 AU - Hyuk-Tae Kwon AU - Churl Kyoung Lee AU - Ki-Joon Jeon AU - Cheol-Min Park UR - https://acs.figshare.com/articles/journal_contribution/Silicon_Diphosphide_A_Si-Based_Three-Dimensional_Crystalline_Framework_as_a_High-Performance_Li-Ion_Battery_Anode/3412927 DO - 10.1021/acsnano.6b02727.s001 L4 - https://ndownloader.figshare.com/files/5333464 KW - LIB KW - electrochemical reaction mechanism KW - SiP 2 KW - silicon KW - alternative anode material N2 - The development of an electrode material for rechargeable Li-ion batteries (LIBs) and the understanding of its reaction mechanism play key roles in enhancing the electrochemical characteristics of LIBs for use in various portable electronics and electric vehicles. Here, we report a three-dimensional (3D) crystalline-framework-structured silicon diphosphide (SiP2) and its interesting electrochemical behaviors for superior LIBs. During Li insertion in the SiP2, a three-step electrochemical reaction mechanism, sequentially comprised of a topotactic transition (0.55–2 V), an amorphization (0.25–2 V), and a conversion (0–2 V), was thoroughly analyzed. On the basis of the three-step electrochemical reaction mechanism, excellent electrochemical properties, such as high initial capacities, high initial Coulombic efficiencies, stable cycle behaviors, and fast-rate capabilities, were attained from the preparation of a nanostructured SiP2/C composite. This 3D crystalline-framework-structured SiP2 compound will be a promising alternative anode material in the realization and mass production of excellent, rechargeable LIBs. ER -