Synthesis, Structures, and Electrochemical Characteristics of Pyrophosphates

Yasushi Uebou; Shigeto Okada; Minato Egashira; Jun-ichi Yamaki

doi:10.15017/7937

Synthesis, Structures, and Electrochemical Characteristics of Pyrophosphates

Yasushi Uebou, Shigeto Okada, Minato Egashira, Jun-ichi Yamaki

Department of Advanced Device Materials

Research output: Contribution to journal › Article

Abstract

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.

Original language	English
Pages (from-to)	57-61
Number of pages	5
Journal	The Reports of Institute of Advanced Material Study,Kyushu University
Volume	15
Issue number	1
DOIs	https://doi.org/10.15017/7937
Publication status	Published - 2001

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title = "Synthesis, Structures, and Electrochemical Characteristics of Pyrophosphates",

abstract = "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.",

author = "Yasushi Uebou and Shigeto Okada and Minato Egashira and Jun-ichi Yamaki",

year = "2001",

doi = "10.15017/7937",

language = "English",

volume = "15",

pages = "57--61",

journal = "The Reports of Institute of Advanced Material Study,Kyushu University",

issn = "0914-3793",

publisher = "Kyushu University",

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TY - JOUR

T1 - Synthesis, Structures, and Electrochemical Characteristics of Pyrophosphates

AU - Uebou, Yasushi

AU - Okada, Shigeto

AU - Egashira, Minato

AU - Yamaki, Jun-ichi

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

U2 - 10.15017/7937

DO - 10.15017/7937

M3 - Article

SN - 0914-3793

VL - 15

SP - 57

EP - 61

JO - The Reports of Institute of Advanced Material Study,Kyushu University

JF - The Reports of Institute of Advanced Material Study,Kyushu University

IS - 1

ER -

Synthesis, Structures, and Electrochemical Characteristics of Pyrophosphates

Abstract

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