Si(CO) y Negative Electrodes for Li-Ion Batteries
Si(CO) y (0 ≤ y ≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2 at room temperature. Silicon reacts with CO2 rapidly 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...
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Published in | Chemistry of materials Vol. 33; no. 18; pp. 7386 - 7395 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
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American Chemical Society
28.09.2021
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Abstract | Si(CO) y (0 ≤ y ≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2 at room temperature. Silicon reacts with CO2 rapidly 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 Li4SiO4 during the first lithiation. This implies that such alloys can have significantly greater initial coulombic efficiency (ICE) than SiO x at any given gravimetric or volumetric capacity. |
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AbstractList | Si(CO) y (0 ≤ y ≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2 at room temperature. Silicon reacts with CO2 rapidly 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 Li4SiO4 during the first lithiation. This implies that such alloys can have significantly greater initial coulombic efficiency (ICE) than SiO x at any given gravimetric or volumetric capacity. |
Author | Cao, Yidan Dunlap, R. A Liese, Julia Werner-Zwanziger, Ulrike Hans, Sophie Obrovac, M. N Bennett, J. Craig Wang, Jun |
AuthorAffiliation | Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School Department of Chemistry Faculty of Physics Ludwig-Maximilians-Universität München College of Sustainability Tsinghua University Clean Technologies Research Institute Dalhousie University Department of Physics and Atmospheric Science Department of Physics |
AuthorAffiliation_xml | – name: College of Sustainability – name: Department of Chemistry – name: Dalhousie University – name: Ludwig-Maximilians-Universität München – name: Department of Physics – name: Tsinghua University – name: Clean Technologies Research Institute – name: Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School – name: Department of Physics and Atmospheric Science – name: Faculty of Physics |
Author_xml | – sequence: 1 givenname: Yidan surname: Cao fullname: Cao, Yidan organization: Dalhousie University – sequence: 2 givenname: Sophie surname: Hans fullname: Hans, Sophie organization: Department of Chemistry – sequence: 3 givenname: Julia surname: Liese fullname: Liese, Julia organization: Ludwig-Maximilians-Universität München – sequence: 4 givenname: Ulrike surname: Werner-Zwanziger fullname: Werner-Zwanziger, Ulrike organization: Dalhousie University – sequence: 5 givenname: Jun surname: Wang fullname: Wang, Jun organization: Department of Chemistry – sequence: 6 givenname: J. Craig orcidid: 0000-0003-3122-6486 surname: Bennett fullname: Bennett, J. Craig organization: Department of Physics – sequence: 7 givenname: R. A surname: Dunlap fullname: Dunlap, R. A organization: Dalhousie University – sequence: 8 givenname: M. N orcidid: 0000-0001-5509-3185 surname: Obrovac fullname: Obrovac, M. N email: mnobrovac@dal.ca organization: Dalhousie University |
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