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...

Full description

Saved in:
Bibliographic Details
Published inChemistry of materials Vol. 33; no. 18; pp. 7386 - 7395
Main Authors Cao, Yidan, Hans, Sophie, Liese, Julia, Werner-Zwanziger, Ulrike, Wang, Jun, Bennett, J. Craig, Dunlap, R. A, Obrovac, M. N
Format Journal Article
LanguageEnglish
Published American Chemical Society 28.09.2021
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:0897-4756
1520-5002
DOI:10.1021/acs.chemmater.1c01989