Electrochemical Properties of Carbon and Copper-coated Si/Graphite Composite Anode

Title
Electrochemical Properties of Carbon and Copper-coated Si/Graphite Composite Anode
Authors
김형선정경윤조원일조병원
Keywords
silicon; composite anode; lithium battery
Issue Date
2009-05
Publisher
215th Electrochemical Society Meeting
Abstract
Recently, many anode active materials have been studied to increase the specific capacity of lithium-ion batteries [1-3]. Among the candidate materials, silicon is one of the most promising anode materials because of its high specific capacity of 4,200 mAhg-1. However, silicon undergoes a rapid capacity fading due to its low conductivity and severe volume change during the cycling. Especially, the latter effect would cause the loose electrical contact between active material and current collector, and consequently the severe failure of electrodes during the lithium alloying and de-alloying process. Various attempts have been made to overcome these problems by coating the surface of the silicon powders with different conducting materials [4, 5]. In this works, a carbon and copper-coated silicon material was prepared by electroless copper plating on the nanosized silicon powder followed by pyrolyzing with hydrocarbon gas decomposition. The electrochemical properties of this material as anode for lithium ion batteries were investigated using various analytical techniques.
URI
http://pubs.kist.re.kr/handle/201004/35259
Appears in Collections:
KIST Publication > Conference Paper
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