Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1608995 | Journal of Alloys and Compounds | 2015 | 4 Pages |
Abstract
Electrochemical behavior of SiO electrode as a Na-ion battery anode was investigated by using thick-film electrodes without any binder or conductive additive. The SiO electrode reacted with Na to exhibit a reversible capacity of over 200 mA h g−1 at the first cycle, whereas Si electrode showed less capacity. We previously demonstrated that SiO being an amorphous material is composed of three-dimensional SiO4 tetrahedral network similar to silica glass and Si clusters, and that the Si clusters are finely dispersed in the SiO4 matrices. Given this characteristics, it is considered that the capacity obtained from the SiO originates from an alloying reaction of the Si clusters having a high surface energy with Na.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Masahiro Shimizu, Hiroyuki Usui, Kohei Fujiwara, Kazuya Yamane, Hiroki Sakaguchi,