Cathode properties of pyrophosphates for rechargeable lithium batteries

Two rechargeable pyrophosphates, LiVP 2O 7 and TiP 2O 7, were synthesized by a solid state reaction, and the cathode properties were investigated. The structures were characterized by powder X-ray Rietveld refinement. LiVP 2O 7 was isostructural with P2 1 monoclinic LiFeP 2O 7 and TiP 2O 7 was isost...

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Veröffentlicht in:Solid state ionics 2002-06, Vol.148 (3), p.323-328
Hauptverfasser: Uebou, Yasushi, Okada, Shigeto, Egashira, Minato, Yamaki, Jun-Ichi
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container_issue 3
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container_title Solid state ionics
container_volume 148
creator Uebou, Yasushi
Okada, Shigeto
Egashira, Minato
Yamaki, Jun-Ichi
description Two rechargeable pyrophosphates, LiVP 2O 7 and TiP 2O 7, were synthesized by a solid state reaction, and the cathode properties were investigated. The structures were characterized by powder X-ray Rietveld refinement. LiVP 2O 7 was isostructural with P2 1 monoclinic LiFeP 2O 7 and TiP 2O 7 was isostructural with Pa3 cubic ZrV 2O 7. Lithium cells using LiVP 2O 7 cathodes showed that approximately 0.5 Li per unit could be reversibly deintercalated from LiVP 2O 7 at 4.1 V vs. Li/Li +. On the other hand, 0.6 Li per unit could be reversibly intercalated into TiP 2O 7 at 2.6 V vs. Li/Li +.
doi_str_mv 10.1016/S0167-2738(02)00069-3
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subjects Applied sciences
Cathode-active materials
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Lithium secondary batteries
Pyrophosphates
title Cathode properties of pyrophosphates for rechargeable lithium batteries
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