抄録
We synthesized the two pyrophosphates LiVP_2O_7 and TiP_2O_7 by a solid state reaction, and the cathode properties of lithium secondary batteries were investigated. The structures were characterized by powder X-ray Rietveld refinement. Lithium cells using LiVP_2O_7 and TiP_2O_7 cathodes showed that approximately 0.5 Li per unit could be reversibly deintercalated from LiVP_2O_7 at 4.1V vs. Li/Li^+, 0.8 Li per unit could be reversibly intercalated into TiP_2O_7 at 2.6V vs. Li/Li^+. The redox potentials 4.1V of LiVP_2O_7 and 2.6V of TiP_2O_7 were higher than that of transition metal oxides such as VO_2 and TiO_2.
| 本文言語 | 英語 |
|---|---|
| ページ（範囲） | 57-61 |
| ページ数 | 5 |
| ジャーナル | The Reports of Institute of Advanced Material Study,Kyushu University |
| 巻 | 15 |
| 号 | 1 |
| DOI | |
| 出版ステータス | 出版済み - 2001 |