The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.
In Situ TEM Investigation of Congruent Phase Transition and Structural Evolution of Nanostructured Silicon/Carbon Anode for Lithium Ion Batteries
Abstract
It is well-known that upon lithiation, both crystalline and amorphous Si transform to an armorphous Li(x)Si phase, which subsequently crystallizes to a (Li, Si) crystalline compound, either Li(15)Si(4) or Li(22)Si(5). Presently, the detailed atomistic mechanism of this phase transformation and the degradation process in nanostructured Si are not fully understood. Here, we report the phase transformation characteristic and microstructural evolution of a specially designed amorphous silicon (a-Si) coated carbon nanofiber (CNF) composite during the charge/discharge process using in situ transmission electron microscopy and density function theory molecular dynamic calculation. We found the crystallization of Li(15)Si(4) from amorphous Li(x)Si is a spontaneous, congruent phase transition process without phase separation or large-scale atomic motion, which is drastically different from what is expected from a classic nucleation and growth process. The a-Si layer is strongly bonded to the CNF and no spallation or cracking is observed during the early stages of cyclic charge/discharge. Reversible volume expansion/contraction upon charge/discharge is fully accommodated along the radial direction. However, with progressive cycling, damage in the form of surface roughness was gradually accumulated on the coating layer, which is believed to be the mechanism for the eventual capacity fade of the composite anode during long-term charge/discharge cycling.
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Cites
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In Situ Observation of the Electrochemical Lithiation of a Single SnO 2 Nanowire Electrode
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Self-citationSilicon Nanotube Battery Anodes
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Recent Advances in Inorganic Heterogeneous Electrocatalysts for Reduction of Carbon Dioxide
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Self-citationInterfaces and Interphases in All-Solid-State Batteries with Inorganic Solid Electrolytes
Banerjee, A., Wang, X., Fang, C., Wu, E. A., & Meng, Y. S. (2020) · Chemical Reviews · doi:10.1021/acs.chemrev.0c00101 · Cited by 1,526
Electrode Degradation in Lithium-Ion Batteries
Pender, J. P., Jha, G., Youn, D. H., Ziegler, J. M., Andoni, I., Choi, E. J., Heller, A., Dunn, B. S., Weiss, P. S., Penner, R. M., et al. (2020) · ACS Nano · doi:10.1021/acsnano.9b04365 · Cited by 873
In Situ TEM of Two-Phase Lithiation of Amorphous Silicon Nanospheres
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Metadata
- Authors
- Wang, C.-M., Li, X., Wang, Z., Xu, W., Liu, J., Gao, F., Kovarik, L., Zhang, J.-G., Howe, J., Burton, D. J., Liu, Z., Xiao, X., Thevuthasan, S., & Baer, D. R.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-03-06
- Volume
- 12
- Issue
- 3
- Pages
- 1624-1632
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W1999365578
- Cited by
- 277
- References
- 32
- FWCI
- 20.14
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, C.-M., Li, X., Wang, Z., Xu, W., Liu, J., Gao, F., Kovarik, L., Zhang, J.-G., Howe, J., Burton, D. J., Liu, Z., Xiao, X., Thevuthasan, S., & Baer, D. R. (2012). In Situ TEM Investigation of Congruent Phase Transition and Structural Evolution of Nanostructured Silicon/Carbon Anode for Lithium Ion Batteries. Nano Letters. https://doi.org/10.1021/nl204559u
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