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In Situ X-ray Diffraction Studies of (De)lithiation Mechanism in Silicon Nanowire Anodes
Abstract
Silicon is a promising anode material for Li-ion batteries due to its high theoretical specific capacity. From previous work, silicon nanowires (SiNWs) are known to undergo amorphorization during lithiation, and no crystalline Li-Si product has been observed. In this work, we use an X-ray transparent battery cell to perform in situ synchrotron X-ray diffraction on SiNWs in real time during electrochemical cycling. At deep lithiation voltages the known metastable Li(15)Si(4) phase forms, and we show that avoiding the formation of this phase, by modifying the SiNW growth temperature, improves the cycling performance of SiNW anodes. Our results provide insight on the (de)lithiation mechanism and a correlation between phase evolution and electrochemical performance for SiNW anodes.
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Cited by
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In Situ TEM of Two-Phase Lithiation of Amorphous Silicon Nanospheres
McDowell, M. T., Lee, S. W., Harris, J. T., Korgel, B. A., Wang, C., Nix, W. D., & Cui, Y. (2013) · Nano Letters · doi:10.1021/nl3044508 · Cited by 869
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Self-citationNanostructured positive electrode materials for post-lithium ion batteries
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Metadata
- Authors
- Misra, S., Liu, N., Nelson, J., Hong, S. S., Cui, Y., & Toney, M. F.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-05-10
- Volume
- 6
- Issue
- 6
- Pages
- 5465-5473
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2153775248
- Cited by
- 188
- References
- 0
- FWCI
- 9.56
- Type
- journal article
- Language
- en
- Open access
- closed
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- Misra, S., Liu, N., Nelson, J., Hong, S. S., Cui, Y., & Toney, M. F. (2012). In Situ X-ray Diffraction Studies of (De)lithiation Mechanism in Silicon Nanowire Anodes. ACS Nano. https://doi.org/10.1021/nn301339g
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