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- W3028989485 endingPage "125103" @default.
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- W3028989485 abstract "• Yolk-shelled FeP/Ni 2 P/C@C with void has been synthesized by annealing-phosphatizing treatments. • Bimetal phosphates and yolk-shelled structure enhanced the performance of FeP/Ni 2 P/C@C electrode. • PVP used as inducer, controller and carbon source in the synthesis process of FeP/Ni 2 P/C@C. Designing and preparing electrode materials with controllable morphology, structure and component to enhance electrochemical performance of lithium ion battery is still a challenging and valuable work. Herein, polyvinyl pyrrolidone (PVP) was selected as inducer, controller and carbon source for the successful synthesis of yolk-shelled FeP/Ni 2 P/C@C nanospheres with voids. It revealed that the obtained FeP/Ni 2 P/C@C nanoparticles (NPs) possessed outer carbon layer with the thickness of average 10 nm and void between shell and internal nanoparticles with the width of about 8 nm. A model of recognition–nucleation–aggregation–limited growth–heterogeneous contraction was proposed for explaining the formation mechanism of yolk-shelled FeP/Ni 2 P/C@C nanospheres. As anode material, the reversible capacity of FeP/Ni 2 P/C@C nanospheres reached 426 mA h g −1 at a current density of 0.5 A g -1 after 100 cycles. Even at the high current density of 1 A g -1 , it still retained a capacity of 364 mA h g -1 . Compared with FeP/Ni 2 P/C obtained without PVP, the FeP/Ni 2 P/C@C electrode with excellent electrochemical performance maybe owe to the distinctive yolk-shelled structure and synergistic effect of carbon, which could ease volume expansion, increase electrical conductivity and accelerate diffusion of Li + ions and electrons in the process of charge/discharge. This work can be extended to develop other electrode materials with controlled structure and enhanced electrochemical performance for LIBs." @default.
- W3028989485 created "2020-06-05" @default.
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- W3028989485 date "2020-10-01" @default.
- W3028989485 modified "2023-10-12" @default.
- W3028989485 title "Yolk-shelled FeP/Ni2P/C@C nanospheres with void: Controllable synthesis and excellent performance as the anode for lithium-ion batteries" @default.
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- W3028989485 doi "https://doi.org/10.1016/j.colsurfa.2020.125103" @default.
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