Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Article
Electrochemical Properties of Silicon/C Composite with Porous Carbon Designed Using α-Cyclodextrin and Surfactant
Ayuko KITAJOURyo KAWAGUCHITomomichi YAMAGUCHIKenta FUJIIMasayuki MORITANobuko YOSHIMOTO
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ジャーナル オープンアクセス

2019 年 87 巻 4 号 p. 229-233

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A Si-porous carbon composite, prepared by the carbonization of clathrate compounds including nano-Si particles, was proposed as a new anode for Li-ion batteries offering the advantages of low manufacturing cost and better electrochemical properties. The porous carbon obtained from the clathrate compounds of α-cyclodextrin and surfactant had a high specific surface area of 2000 m2 g−1, and its initial delithiation capacity was 363 mAh g−1 at a rate of 0.1 C. In addition, the initial delithiation capacity of the obtained Si-porous carbon composite was 556 mAh g−1 at a rate of 0.1 C. In addition, its capacity retention was 96% after 100 cycles, because the low electronic conductivity of Si was improved by preparing the composites of Si and porous carbon.

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© 2019 The Electrochemical Society of Japan
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