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- W3094557809 abstract "Abstract Silicon is a low price and high capacity anode material for lithium-ion batteries. The yolk-shell structure can effectively accommodate Si expansion to improve stability. However, the limited rate performance of Si anodes can’t meet people’s growing demand for high power density. Herein, the phosphorus-doped yolk-shell Si@C materials (P-doped Si@C) were prepared through carbon coating on P-doped Si/SiO x matrix to obtain high power and stable devices. Therefore, the as-prepared P-doped Si@C electrodes delivered a rapid increase in Coulombic efficiency from 74.4% to 99.6% after only 6 cycles, high capacity retention of ∼ 95% over 800 cycles at 4 A·g −1 , and great rate capability (510 mAh·g −1 at 35 A·g −1 ). As a result, P-doped Si@C anodes paired with commercial activated carbon and LiFePO 4 cathode to assemble lithium-ion capacitor (high power density of ∼ 61,080 W·kg −1 at 20 A·g −1 ) and lithium-ion full cell (good rate performance with 68.3 mAh·g −1 at 5 C), respectively. This work can provide an effective way to further improve power density and stability for energy storage devices." @default.
- W3094557809 created "2020-10-29" @default.
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- W3094557809 date "2020-10-23" @default.
- W3094557809 modified "2023-10-01" @default.
- W3094557809 title "High power and stable P-doped yolk-shell structured Si@C anode simultaneously enhancing conductivity and Li+ diffusion kinetics" @default.
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- W3094557809 doi "https://doi.org/10.1007/s12274-020-3142-9" @default.
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