Porous TiO2 layer encapsulated silicon as an anode material for lithium secondary batteries

Title
Porous TiO2 layer encapsulated silicon as an anode material for lithium secondary batteries
Authors
김보은박상은이상화임종주조병원이중기
Keywords
porous TiO2; encapsulated silicon; anode; secondary batteries
Issue Date
2009-01
Publisher
10th International symposium on Eco-Material Processing and Design
Abstract
Silicon has been considered one of the promising alternative anode materials for lithium secondary batteries due to its high specific capacity of 4200mAh/g. The employment of surface modification for silicon is needed because it may separate from ion transmission path of the electrode due to its severe volume expansion during repeated charge-discharge cycle. In order to complement the integrity of the electrode structure of the silicon active material, TiO2 coating layer formed on the surface of the silicon was prepared by modified sol-gel method. It has been generally attempted to coat carbon with good conductivity on the surface of the silicon. However, porous layer coating has not been provided yet. TiO2 layer on silicon which having optimum physical structure may lead to better electrochemical performance. The purpose of this work is to investigate the relationship between the physical properties and electrochemical characteristics for the TiO2 layer encapsulated silicon as an active material of lithium secondary batteries.
URI
http://pubs.kist.re.kr/handle/201004/36116
Appears in Collections:
KIST Publication > Conference Paper
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