Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2014-12-10 |
タイトル |
|
|
タイトル |
Characterization of mixed titanium-niobium oxide Ti2Nb10O29 annealed in vacuum as anode material for lithium-ion battery |
言語 |
|
|
言語 |
eng |
資源タイプ |
|
|
資源タイプ |
journal article |
著者 |
高島, 俊生
東城, 友都
稲田, 亮史
櫻井, 庸司
Takashima, Toshiki
Tojo, Tomohiro
Inada, Ryoji
Sakurai, Yoji
|
抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
In this paper, the properties of mixed titanium-niobium oxide Ti2Nb10O29 (TNO) annealed in air and vacuum as anode material for lithium-ion battery were investigated. The color of TNO annealed in vacuum (V-TNO) is dark blue while white for TNO annealed in air (A-TNO). Moreover, lattice parameters for V-TNO were confirmed to be slightly larger than those for A-TNO. Introduction of oxygen defect in V-TNO was confirmed by thermogravimetric analysis. X-ray photoelectron spectroscopy analysis also indicated that Ti4+ in V-TNO are partially reduced into Ti3+, due to the introduction of oxygen defect in V-TNO. Electronic conductivity at room temperature for uni-axially pressed V-TNO powder is estimated to be around 10-610-5 S cm-1, which is more than three digits higher than that for pressed A-TNO powder (= 10-9 S cm-1). The enhancement of intrinsic electronic conductivity of TNO greatly contributes for improving the rate performance. At low current density of 0.5 mA cm-2, both A-TNO and V-TNO showed reversible capacity around 250 mAh g-1 at potential range from 1.0 to 2.5 V vs. Li/Li+, while at higher current density of 10 mA cm-2, V-TNO maintained much higher discharge capacity of 150 mAh g-1 than that for TNO (= 50 mAh g-1). |
書誌情報 |
Journal of Power Sources
巻 276,
p. 113-119,
発行日 2015-02
|
出版者 |
|
|
出版者 |
Elsevier |
DOI |
|
|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1016/j.jpowsour.2014.11.109 |
権利 |
|
|
権利情報 |
Copyright © 2014 Elsevier B.V. All rights reserved |
関連サイト |
|
|
|
識別子タイプ |
URI |
|
|
関連識別子 |
http://www.sciencedirect.com/science/article/pii/S0378775314019661 |
|
|
関連名称 |
ScienceDirect |
著者版フラグ |
|
|
出版タイプ |
AM |
キーワード |
|
|
主題 |
Ti2Nb10O29 |
キーワード |
|
|
主題 |
Lithium-ion battery |
キーワード |
|
|
主題 |
Anode material |
キーワード |
|
|
主題 |
Oxygen defect |
キーワード |
|
|
主題 |
Electronic conductivity |