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- W3158438035 abstract "A N-enriched porous carbon/SiO2 (SiO2/NC) composite from rice husks was prepared by ball milling and tested as a stable anode for lithium ion batteries (LIBs), in which the homogeneous dispersion of SiO2 nanoparticles and carbon matrix, and high level of N-doping can be realized simultaneously. The influence of N-doping on a series of SiO2/NCs was systematically studied; this proved that the porosity, N-doping content, and electronic conductivity of SiO2/NC can be controlled by adjusting common nitrogen sources (urea and melamine) and doping routes, including dry and wet milling, to reach a desirable balance of high capacity, long-term cyclability, and rate property. The optimized SiO2/NC composite delivers a stably reversible capacity of 581 mA h g−1 at the high current load of 1.0 A g−1 at the 1000th cycle. The novel Li-storage mechanism of active silica in a composite was first proposed after observation of the N-doping effect that the redox reaction between SiO2 and Li+ is accelerated to transform into an alloying reaction of generated Si and Li+, thus enhancing the reversible capacity. Moreover, kinetics analysis confirms that there is a combined Li-storage mechanism of battery-capacitive pattern in composite that contributes to fast charge transfer and ion diffusion during cycle." @default.
- W3158438035 created "2021-05-10" @default.
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- W3158438035 date "2021-04-26" @default.
- W3158438035 modified "2023-09-26" @default.
- W3158438035 title "N‐Enriched Porous Carbon/SiO2 Composites Derived from Biomass Rice Husks for Boosting Li‐Ion Storage: Insight into the Effect of N‐Doping" @default.
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- W3158438035 doi "https://doi.org/10.1002/chem.202100727" @default.
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