2000年11月1日
Enhancement of discharge capacity of Li3V2(PO4)3 by stabilizing the orthorhombic phase at room temperature
Solid State Ionics
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- 巻
- 135
- 号
- 1-4
- 開始ページ
- 137
- 終了ページ
- 142
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0167-2738(00)00292-7
- 出版者・発行元
- Elsevier Science Publishers B.V.
Li3V2(PO4)3 and solid solutions of Li3-2x(V1-xZrx)2(PO4)3 were prepared by a solid state reaction. A high temperature orthorhombic phase of Li3V2(PO4)3 with a β-Fe2(SO4)3-type was successfully stabilized at room temperature by substituting Zr for V with substitution ratios beyond x = 0.05. The pure material of Li3V2(PO4)3 exhibited a cathode performance with two well defined regions of plateau at around 3.7 and 4.1 V vs. Li/Li+ upon charging and 3.6 and 4.0 V vs. Li/Li+ upon discharging, respectively, suggesting two types of phases produced upon the charge/discharge process. On the other hand, the cathode performance of the orthorhombic stabilized materials showed almost the same charge/discharge voltages as those of the pure material, but, with two plateaus slightly sloping, showed a considerably improved charge/discharge cycle performance compared to that of the pure material. Such improvement on the charge/discharge cycle performance is suggested to come from the disordered lithium ion arrangement in the orthorhombic phase.
- ID情報
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- DOI : 10.1016/S0167-2738(00)00292-7
- ISSN : 0167-2738
- SCOPUS ID : 0034322976