Nano-sized SiOx/C composite anode for lithium ion batteries

Jing Wang; Hailei Zhao; Jianchao He; Chunmei Wang; Jie Wang

doi:10.1016/j.jpowsour.2011.01.053

Nano-sized SiO_x/C composite anode for lithium ion batteries

Jing Wang
, Hailei Zhao^*
, Jianchao He
, Chunmei Wang
, Jie Wang

^*Corresponding author for this work

University of Science and Technology Beijing
Beijing Key Lab of New Energy Material and Technology

Research output: Contribution to journal › Article › peer-review

222 Scopus citations

Abstract

Nano-sized SiO_x/C composite with core-shell structure is prepared by a modified Stöber method. After heat-treatment, the O/Si ratio in SiO_x/C composite is near 1 and the core of SiO_x presents a structure composing of amorphous Si clusters and ordered SiO ₂ domains. SiO_x/C composite anode shows high specific capacity (ca. 800 mAh g^-1), excellent cycling stability, good rate-capability but low initial coulombic efficiency. Li₂O and Li₄SiO₄ may generate in the initial lithiation process, which, combining with the carbon shell, can buffer the volume change caused by the alloying of Si with Li, and thereby improving the cycling stability of electrode. The nano feature of SiO_x/C particle and the electronic conductive nature of carbon coating layer ensure the good rate-capability of SiO_x/C electrode.

Original language	English
Pages (from-to)	4811-4815
Number of pages	5
Journal	Journal of Power Sources
Volume	196
Issue number	10
DOIs	https://doi.org/10.1016/j.jpowsour.2011.01.053
State	Published - 15 May 2011
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Anode
Carbon coating
Core-shell structure
Lithium ion battery
Silicon oxide

Access to Document

10.1016/j.jpowsour.2011.01.053

Cite this

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title = "Nano-sized SiOx/C composite anode for lithium ion batteries",

abstract = "Nano-sized SiOx/C composite with core-shell structure is prepared by a modified St{\"o}ber method. After heat-treatment, the O/Si ratio in SiOx/C composite is near 1 and the core of SiOx presents a structure composing of amorphous Si clusters and ordered SiO 2 domains. SiOx/C composite anode shows high specific capacity (ca. 800 mAh g-1), excellent cycling stability, good rate-capability but low initial coulombic efficiency. Li2O and Li4SiO4 may generate in the initial lithiation process, which, combining with the carbon shell, can buffer the volume change caused by the alloying of Si with Li, and thereby improving the cycling stability of electrode. The nano feature of SiOx/C particle and the electronic conductive nature of carbon coating layer ensure the good rate-capability of SiOx/C electrode.",

keywords = "Anode, Carbon coating, Core-shell structure, Lithium ion battery, Silicon oxide",

author = "Jing Wang and Hailei Zhao and Jianchao He and Chunmei Wang and Jie Wang",

year = "2011",

month = may,

day = "15",

doi = "10.1016/j.jpowsour.2011.01.053",

language = "英语",

volume = "196",

pages = "4811--4815",

journal = "Journal of Power Sources",

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TY - JOUR

T1 - Nano-sized SiOx/C composite anode for lithium ion batteries

AU - Wang, Jing

AU - Zhao, Hailei

AU - He, Jianchao

AU - Wang, Chunmei

AU - Wang, Jie

PY - 2011/5/15

Y1 - 2011/5/15

N2 - Nano-sized SiOx/C composite with core-shell structure is prepared by a modified Stöber method. After heat-treatment, the O/Si ratio in SiOx/C composite is near 1 and the core of SiOx presents a structure composing of amorphous Si clusters and ordered SiO 2 domains. SiOx/C composite anode shows high specific capacity (ca. 800 mAh g-1), excellent cycling stability, good rate-capability but low initial coulombic efficiency. Li2O and Li4SiO4 may generate in the initial lithiation process, which, combining with the carbon shell, can buffer the volume change caused by the alloying of Si with Li, and thereby improving the cycling stability of electrode. The nano feature of SiOx/C particle and the electronic conductive nature of carbon coating layer ensure the good rate-capability of SiOx/C electrode.

AB - Nano-sized SiOx/C composite with core-shell structure is prepared by a modified Stöber method. After heat-treatment, the O/Si ratio in SiOx/C composite is near 1 and the core of SiOx presents a structure composing of amorphous Si clusters and ordered SiO 2 domains. SiOx/C composite anode shows high specific capacity (ca. 800 mAh g-1), excellent cycling stability, good rate-capability but low initial coulombic efficiency. Li2O and Li4SiO4 may generate in the initial lithiation process, which, combining with the carbon shell, can buffer the volume change caused by the alloying of Si with Li, and thereby improving the cycling stability of electrode. The nano feature of SiOx/C particle and the electronic conductive nature of carbon coating layer ensure the good rate-capability of SiOx/C electrode.

KW - Anode

KW - Carbon coating

KW - Core-shell structure

KW - Lithium ion battery

KW - Silicon oxide

UR - https://www.scopus.com/pages/publications/79952282607

U2 - 10.1016/j.jpowsour.2011.01.053

DO - 10.1016/j.jpowsour.2011.01.053

M3 - 文章

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EP - 4815

JO - Journal of Power Sources

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