Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep12154
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Funding
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2013TS08]
- Fundamental Research Funds for the Central Universities [HIT.IBRSEM.A.201408]
- open foundation of Beijing Key Laboratory for Chemical Power Source and Green Catalysis [2015CX02028]
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Novel hierarchical carbon nanohorns (CNHs) carried iron fluoride nanocomposites have been constructed by direct growth of FeF3 center dot 0.33H(2)O nanoparticles on CNHs. In the FeF3 center dot 0.33H(2)O@CNHs nanocomposite, the mesopore CNHs play the role as conductive matrix and robust carrier to support the FeF3 center dot 0.33H(2)O nanoparticles. The intimate conductive contact between the two components can build up an express way of electron transfer for rapid Li+ insertion/extraction. The CNHs can not only suppress the growth and agglomeration of FeF3 center dot 0.33H(2)O during the crystallization process, but also sever as an elastic confinement to support FeF3 center dot 0.33H(2)O. As was to be expected, the hierarchical FeF3 center dot 0.33H(2)O@CNHs nanocomposite exhibits impressive rate capability and excellent cycle performance. Markedly, the nanocomposite proves stable, ultrahigh rate lithium ion storage properties of 81 mAh g(-1) at charge/discharge rate of 50C (a discharge/charge process only takes 72 s). The integration of high electron conductivity, confined nano sized FeF3 center dot 0.33H(2)O (similar to 5 nm), hierarchical mesopores CNHs and the elastic confinement support, the FeF3 center dot 0.33H(2)O@CNHs nanocomposite demonstrates excellent ultrahigh rate capability and good cycling properties.
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