Si(CO)y Negative Electrodes for Li-Ion Batteries

被引：10

作者：

Cao, Yidan ^{[1
,2
,3
,4
]}

Hans, Sophie ^{[3
]}

Liese, Julia ^{[3
,5
]}

Werner-Zwanziger, Ulrike ^{[3
,6
]}

Wang, Jun ^{[3
]}

Bennett, J. Craig ^{[7
]}

Dunlap, R. A. ^{[4
,8
]}

Obrovac, M. N. ^{[3
,4
,6
]}

机构：

[1] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Guangdong, Peoples R China

[2] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Inst Mat Res, Shenzhen 518055, Guangdong, Peoples R China

[3] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4R2, Canada

[4] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada

[5] Ludwig Maximilians Univ Munchen, Fac Phys, D-80539 Munich, Germany

[6] Dalhousie Univ, Clean Technol Res Inst, Halifax, NS B3H 4R2, Canada

[7] Acadia Univ, Dept Phys, Wolfville, NS B4P 2R6, Canada

[8] Dalhousie Univ, Coll Sustainabil, Halifax, NS B3H 4R2, Canada

来源：

CHEMISTRY OF MATERIALS | 2021年 / 33卷 / 18期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

SIOX ANODE; IR-SPECTRA; PERFORMANCE; ALLOY; MECHANOCHEMISTRY; NANOSTRUCTURES; TEMPERATURE; ATMOSPHERE; NITRIDES; FILMS;

D O I：

10.1021/acs.chemmater.1c01989

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 SiOx at any given gravimetric or volumetric capacity.

引用

页码：7386 / 7395

页数：10

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