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- W3093789849 abstract "Silicon-based anode materials enable the development of commercial lithium-ion batteries (LIBs) with higher gravimetric energy densities than are currently available. However, the inherently low electronic and ionic conductivity as well as large volume expansion upon lithiation of Si hinder their use in practical applications. Here we report a cation-disordered CuSi2P3 material, synthesized using high-energy ball milling, that shows improved stability, larger capacity, and higher ionic and electronic conductivity than pure Si. When used as an anode for LIBs, CuSi2P3 demonstrates a high reversible capacity of 2069 mA h g−1 with an initial Coulombic efficiency of 91% and a suitable working potential of 0.5 V (vs. Li+/Li). Further, after a two-step ball milling of CuSi2P3 with graphite, a yolk-shell structured carbon-coated CuSi2P3@graphene nanocomposite is formed that shows enhanced long-term cycling stability (1394 mA h g−1 after 1500 cycles at 2 A g−1; 1804 mA h g−1 after 500 cycles at 200 mA g−1) and rate capability (530 mA h g−1 at 50 A g−1), surpassing those for other Cu-Si, Cu-P, and Si-P compounds or single-component Si- and P-based composites. When coupled with a LiNi0.5Co0.2Mn0.3O2 (NCM) cathode in a full cell, the NCM//CuSi2P3 @graphene battery exhibits a high capacity of 140 mA h g−1 after 200 cycles, demonstrating the potential of CuSi2P3 anodes for the next-generation high-performance LIBs." @default.
- W3093789849 created "2020-10-29" @default.
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- W3093789849 date "2021-02-01" @default.
- W3093789849 modified "2023-10-14" @default.
- W3093789849 title "Yolk-shell structured CuSi2P3@Graphene nanocomposite anode for long-life and high-rate lithium-ion batteries" @default.
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- W3093789849 doi "https://doi.org/10.1016/j.nanoen.2020.105506" @default.
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