Si(CO)yNegative Electrodes for Li-Ion Batteries

Yidan Cao; Sophie Hans; Julia Liese; Ulrike Werner-Zwanziger; Jun Wang; J. Craig Bennett; R. A. Dunlap; M. N. Obrovac

doi:10.1021/acs.chemmater.1c01989

Si(CO)yNegative Electrodes for Li-Ion Batteries

Yidan Cao, Sophie Hans, Julia Liese, Ulrike Werner-Zwanziger, Jun Wang, J. Craig Bennett, R. A. Dunlap, M. N. Obrovac

Résultat de recherche: Article › examen par les pairs

8 Citations (Scopus)

Résumé

Si(CO)y(0 ≤y≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO₂at room temperature. Silicon reacts with CO₂rapidly during milling, incorporating C and O in a 1:1 ratio to form alloys consisting of Si nanograins dispersed in an amorphous Si-O-C matrix. The capacity behavior of these alloys suggests the formation of inactive SiC and Li₄SiO₄during the first lithiation. This implies that such alloys can have significantly greater initial coulombic efficiency (ICE) than SiOxat any given gravimetric or volumetric capacity.

Langue d'origine	English
Pages (de-à)	7386-7395
Nombre de pages	10
Journal	Chemistry of Materials
Volume	33
Numéro de publication	18
DOI	https://doi.org/10.1021/acs.chemmater.1c01989
Statut de publication	Published - sept. 28 2021

Note bibliographique

Funding Information:
The authors would like to acknowledge funding from NSERC and Novonix under the auspices of the Industrial Research Chair program, as well as the support of the Canada Foundation for Innovation, the Atlantic Innovation Fund, and other partners that fund the Facilities for Materials Characterization managed by the Clean Technologies Research Institute. The authors would also like to acknowledge Dr. Xiang Yang at Saint Mary’s University for his assistance in acquiring SEM images and Dr. Andrew George for his assistance in acquiring XPS profiles. Y.C. acknowledges financial support from the Killam Trusts, Guangdong Basic and Applied Basic Research Foundation (2019A1515110530), and Tsinghua Shenzhen International Graduate School (QD2021005N).

Publisher Copyright:
© 2021 American Chemical Society

ASJC Scopus Subject Areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/acs.chemmater.1c01989

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abstract = "Si(CO)y(0 ≤y≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2at room temperature. Silicon reacts with CO2rapidly during milling, incorporating C and O in a 1:1 ratio to form alloys consisting of Si nanograins dispersed in an amorphous Si-O-C matrix. The capacity behavior of these alloys suggests the formation of inactive SiC and Li4SiO4during the first lithiation. This implies that such alloys can have significantly greater initial coulombic efficiency (ICE) than SiOxat any given gravimetric or volumetric capacity.",

author = "Yidan Cao and Sophie Hans and Julia Liese and Ulrike Werner-Zwanziger and Jun Wang and Bennett, {J. Craig} and Dunlap, {R. A.} and Obrovac, {M. N.}",

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AU - Cao, Yidan

AU - Hans, Sophie

AU - Liese, Julia

AU - Werner-Zwanziger, Ulrike

AU - Wang, Jun

AU - Bennett, J. Craig

AU - Dunlap, R. A.

AU - Obrovac, M. N.

N1 - Funding Information: The authors would like to acknowledge funding from NSERC and Novonix under the auspices of the Industrial Research Chair program, as well as the support of the Canada Foundation for Innovation, the Atlantic Innovation Fund, and other partners that fund the Facilities for Materials Characterization managed by the Clean Technologies Research Institute. The authors would also like to acknowledge Dr. Xiang Yang at Saint Mary’s University for his assistance in acquiring SEM images and Dr. Andrew George for his assistance in acquiring XPS profiles. Y.C. acknowledges financial support from the Killam Trusts, Guangdong Basic and Applied Basic Research Foundation (2019A1515110530), and Tsinghua Shenzhen International Graduate School (QD2021005N). Publisher Copyright: © 2021 American Chemical Society

PY - 2021/9/28

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N2 - Si(CO)y(0 ≤y≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2at room temperature. Silicon reacts with CO2rapidly during milling, incorporating C and O in a 1:1 ratio to form alloys consisting of Si nanograins dispersed in an amorphous Si-O-C matrix. The capacity behavior of these alloys suggests the formation of inactive SiC and Li4SiO4during the first lithiation. This implies that such alloys can have significantly greater initial coulombic efficiency (ICE) than SiOxat any given gravimetric or volumetric capacity.

AB - Si(CO)y(0 ≤y≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2at room temperature. Silicon reacts with CO2rapidly during milling, incorporating C and O in a 1:1 ratio to form alloys consisting of Si nanograins dispersed in an amorphous Si-O-C matrix. The capacity behavior of these alloys suggests the formation of inactive SiC and Li4SiO4during the first lithiation. This implies that such alloys can have significantly greater initial coulombic efficiency (ICE) than SiOxat any given gravimetric or volumetric capacity.

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Si(CO)yNegative Electrodes for Li-Ion Batteries

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