Characterization of mixed titanium-niobium oxide Ti2Nb10O29 annealed in vacuum as anode material for lithium-ion battery

高島, 俊生; 東城, 友都; 稲田, 亮史; 櫻井, 庸司; Takashima, Toshiki; Tojo, Tomohiro; Inada, Ryoji; Sakurai, Yoji

doi:10.1016/j.jpowsour.2014.11.109

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Characterization of mixed titanium-niobium oxide Ti2Nb10O29 annealed in vacuum as anode material for lithium-ion battery

https://repo.lib.tut.ac.jp/records/1575

名前 / ファイル	ライセンス	アクション
j03787753-0276-113 (5.8 MB)

Item type

学術雑誌論文 / Journal Article(1)

公開日

2014-12-10

タイトル

Characterization of mixed titanium-niobium oxide Ti2Nb10O29 annealed in vacuum as anode material for lithium-ion battery

言語

eng

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

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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 10-610-5 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

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Elsevier

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2023-06-19 07:52:31.438855

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Characterization of mixed titanium-niobium oxide Ti2Nb10O29 annealed in vacuum as anode material for lithium-ion battery

× 高島, 俊生

× 東城, 友都

× 稲田, 亮史

× 櫻井, 庸司

× Takashima, Toshiki

× Tojo, Tomohiro

× Inada, Ryoji

× Sakurai, Yoji

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