フルテキストファイル
著者
Usui Hiroyuki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University 研究者総覧 KAKEN
Kono Takamasa Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University
Sakaguchi Hiroki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University 研究者総覧 KAKEN
キーワード
Zinc oxide
Silicon
Thick-film electrode
Conversion reaction
Gas-deposition method
Li-ion battery
抄録
As a novel anode for Li-ion battery, ZnO/Si composite thick-film electrodes with various ratios of ZnO:Si were prepared by a gas-deposition method using a commercial Si powder and a radial-shaped ZnO powder synthesized by a precipitation method. We investigated the effect of the ZnO amount and the radial morphology on the anode performance, comparing with charge–discharge properties of a ZnO electrode without Si. The ZnO electrode showed a stable cyclability and a moderate discharge capacity of 160–220 mA h g-1 after the 20th cycle. The composite electrode of ZnO/Si with a ratio of 89/11 wt.% exhibited a good cycle stability after the 20th cycle and large discharge capacities exceeding the theoretical capacity of graphite until the 370th cycle. In contrast, a composite electrode containing of crushed ZnO showed a flat surface and poor performance. These results revealed that microstructure of the radial-shaped ZnO is very favorable for improving efficiencies of electrode reactions due to its high surface area, and is effective in accommodating the stresses induced by Li-insertion and Li-extraction in/from Si.
出版者
ESG
資料タイプ
学術雑誌論文
外部リンク
ISSN・ISBN
1452-3981
掲載誌名
International Journal of Electrochemical Science
最新掲載誌名
International Journal of Electrochemical Science
7
5
開始ページ
4322
終了ページ
4334
発行日
2012-05-01
著者版フラグ
出版社版
著作権表記
© 2012 by ESG (www.electrochemsci.org)
掲載情報
International Journal of Electrochemical Science. 2012, 7(5), 4322-4334
部局名
工学部・工学研究科
言語
英語