NDLI: A facile, low-cost synthesis of high-performance silicon-based composite anodes with high tap density for lithium-ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Kim, Sang-Ok Manthiram, Arumugam
Copyright Year	2015
Abstract	Micro-sized carbon-coated Si-based composites have been developed by a simple mechanochemical reaction between SiO, Ni, and Al, followed by an additional milling process with graphite. The resultant carbon-coated Si-based composite exhibits a reversible capacity of over 580 mA h g−1 after 200 cycles with a considerably higher tap density of ∼1.34 g cm−3 compared to nanosized Si (∼0.16 g cm−3). The improvement in the electrochemical performance is achieved due to both highly conductive NiSi2 nanoinclusions and amorphous Al2O3 buffer matrix in the composite. Upon cycling, the multifunctional NiSi2 phase not only provides enhanced electronic conductivity but also suppresses the formation of crystalline Li15Si4 that causes an inhomogeneous volume change. Simultaneously, amorphous Al2O3 plays a crucial role in maintaining particle connectivity by impeding the agglomeration of active Si nanocrystallites. The combination of these advantages with a low-cost, scalable, and environmentally benign synthetic process make the Si-based composite a promising alternative anode for high performance Li-ion batteries.
Starting Page	2399
Ending Page	2406
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	5
Journal	Journal of Materials Chemistry A
DOI	10.1039/c4ta06113f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Graphite Electrochemistry Composite material Anode
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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