Structural properties and electrochemistry of α-LiFeO2

被引：48

作者：

Abdel-Ghany, A. E. ^{[2
,3
]}

Mauger, A. ^{[4
]}

Groult, H. ^{[3
]}

Zaghib, K. ^{[1
]}

Julien, C. M. ^{[3
]}

机构：

[1] Inst Rech Hydro Quebec, Varennes, PQ J3X 1S1, Canada

[2] Natl Res Ctr, Dept Inorgan Chem, Cairo, Egypt

[3] Univ Paris 06, Lab Physicochim Electrolytes Colloides & Syst Ana, F-75005 Paris, France

[4] Univ Paris 06, Inst Mineral & Phys Mat Condensee, F-75005 Paris, France

来源：

JOURNAL OF POWER SOURCES | 2012年 / 197卷

关键词：

Lithium ferrite; Solid-state reaction; Li-ion batteries; Magnetic properties; LITHIUM IRON-OXIDE; MAGNETIC-PROPERTIES; CATHODE MATERIAL; LIFEO2; MORPHOLOGY; EXCHANGE; FORM;

D O I：

10.1016/j.jpowsour.2011.09.054

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, we study the physico-chemistry and electrochemistry of lithium ferrite synthesized by solid-state reaction. Characterization included X-ray diffraction (XRD), scanning electronic microscopy (SEM), Raman scattering (RS), Fourier transform infrared spectroscopy (FTIR), and SQUID magnetometry. XRD peaks gradually sharpen with increasing firing temperature; all the diffraction peaks can be indexed to the cubic alpha-LiFeO2 phase (Fm3m space group) with the refined cell parameter a = 4.155 angstrom. RS and FTIR spectra show the vibrational modes due to covalent Fe-O bonds and the Li-cage mode at low-frequency. The electrochemical properties of Li/LiFeO2 are revisited along with the post-mortem analysis of the positive electrode material using XRD and Raman experiments. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：285 / 291

页数：7

共 38 条

[1] Preparation of LiFeO2 with alpha-NaFeO2-type structure using a mixed-alkaline hydrothermal method [J].