A stable nanoporous silicon anode prepared by modified magnesiothermic reactions Public Deposited

http://ir.library.oregonstate.edu/concern/articles/jm214q59v

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at:  http://www.journals.elsevier.com/nano-energy/

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  • Porous silicon prepared by low-cost and scalable magnesiothermic reactions is a promising anode material for Li-ion batteries; yet, retaining good cycling stability for such materials in electrodes of practical loading remains a challenge. Here, we engineered the nanoporous silicon from a modified magnesiothermic reaction by controlled surface oxidization forming a <5 nm oxide layer on the 10–20 nm Si nanocrystallites. High loading electrodes of ~3 mAh/cm² demonstrates stable cycling with ~80% capacity retention over 150 cycles. The specific discharge capacity based on the total electrode weight is ~1000 mAh/g at the lithiation/delithiation current density of 0.5/0.75 mA/cm². This work reveals the importance of the surface treatment on nanostructured Si, which will lead to a well-controlled ratio of silicon and surface oxide layer and provide guidance on further improvement on silicon-based anode materials.
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  • Li, X., Yan, P., Arey, B. W., Luo, W., Ji, X., Wang, C., ... & Zhang, J. G. (2016). A stable nanoporous silicon anode prepared by modified magnesiothermic reactions. Nano Energy, 20, 68-75. doi:10.1016/j.nanoen.2015.12.011
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  • description.provenance : Submitted by Patricia Black (patricia.black@oregonstate.edu) on 2016-03-16T15:03:44Z No. of bitstreams: 2 LiStableNanoporousSilicon.pdf: 3909833 bytes, checksum: 5255c0f044736afaf2aa6ad052f7d040 (MD5) LiStableNanoporousSiliconSupplementFigureS1-S3.pdf: 409282 bytes, checksum: d02612ef153d85f5d449bfd87c452d49 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2016-03-16T15:04:10Z (GMT) No. of bitstreams: 2 LiStableNanoporousSilicon.pdf: 3909833 bytes, checksum: 5255c0f044736afaf2aa6ad052f7d040 (MD5) LiStableNanoporousSiliconSupplementFigureS1-S3.pdf: 409282 bytes, checksum: d02612ef153d85f5d449bfd87c452d49 (MD5)
  • description.provenance : Made available in DSpace on 2016-03-16T15:04:10Z (GMT). No. of bitstreams: 2 LiStableNanoporousSilicon.pdf: 3909833 bytes, checksum: 5255c0f044736afaf2aa6ad052f7d040 (MD5) LiStableNanoporousSiliconSupplementFigureS1-S3.pdf: 409282 bytes, checksum: d02612ef153d85f5d449bfd87c452d49 (MD5) Previous issue date: 2016-02

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