NDLI: Carbon-coated hierarchically porous silicon as anode material for lithium ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Liquan Shen, Lanyao Wang, Zhaoxiang
Copyright Year	2014
Abstract	Silicon is one of the most promising anode materials for high energy density lithium ion batteries. However, its fast capacity decay due to volume expansion and the resultant particle pulverization hinders its commercial application. Diverse strategies have been proposed to reduce these effects. In this article, hierarchically porous silicon composite is formed by coating the porous silicon particles obtained by magnesiothermically reducing commercial diatomite. Both the void space between the silicon particles and the pores within each silicon particle are designed to accommodate the volume change of silicon in the charge and discharge processes. On the other hand, the carbon coating layer alleviates the volume change of silicon and maintain the electric contact between the particles. The carbon-coated hierarchically porous silicon composite based on this design concept shows much better cyclability than that of the bare porous silicon.
Starting Page	15314
Ending Page	15318
Page Count	5
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	4
Issue Number	29
Journal	RSC Advances
DOI	10.1039/c4ra01255k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Anode Energy density Ion Silicon Diatomaceous earth Carbon
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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Carbon-coated hierarchically porous silicon as anode material for lithium ion batteries