期刊
ELECTROCHEMISTRY
卷 84, 期 10, 页码 797-801出版社
ELECTROCHEMICAL SOC JAPAN
DOI: 10.5796/electrochemistry.84.797
关键词
Lithium Battery; Molybdenum; Iron; Positive Electrode
资金
- Japan Science and Technology Agency (JST)
- SR Center of Ritsumeikan University [R1440]
A binary system, x Li4MoO5-(1 - x) LiFeO2, is studied as electrode materials for rechargeable lithium batteries. A sample of single phase is obtained at x = 0.5, and it is found that Li1.42Mo0.29Fe0.29O2 (x = 0.5) crystalizes into Li5ReO6-type structure. Although an initial charge capacity of Li1.42Mo0.29Fe0.29O2 reaches 350 mAh g(-1), irreversible phase transition associated with oxygen loss and molybdenum migration on charge is evidenced by X-ray diffraction and X-ray absorption spectroscopy. The irreversible phase transition inevitably results in large polarization on discharge as electrode materials in Li cells. These findings provide the basis for the development of high-capacity electrode materials with solid-state redox reaction of oxide ions. (C) The Electrochemical Society of Japan, All rights reserved.
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