Li2Fe(SO4)2 as a 3.83 V positive electrode material

被引：72

作者：

Reynaud, Marine ^{[1
]}

Ati, Mohamed ^{[1
]}

Melot, Brent C. ^{[1
,2
]}

Sougrati, Moulay T. ^{[3
]}

Rousse, Gwenaelle ^{[4
]}

Chotard, Jean-Noel ^{[1
]}

Tarascon, Jean-Marie ^{[1
]}

机构：

[1] Univ Picardie Jules Verne, CNRS UMR 7314, LRCS, F-80039 Amiens, France

[2] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA

[3] CNRS UMR 5253, Inst Charles Gerhardt, Lab Agregats Interfaces & Mat Energie, F-34095 Montpellier 5, France

[4] Univ Paris 06, CNRS UMR 7590, IMPMC, F-75252 Paris 05, France

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 21卷

关键词：

Electrodes; Lithium batteries; Transition metal sulfates; CRYSTAL-STRUCTURE; TRIPLITE STRUCTURE; LIFESO4F; LIVPO4F;

D O I：

10.1016/j.elecom.2012.04.027

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report on the preparation and electrochemical characterization of Li2M(SO4)(2) (M=Co, Fe), where the Fe-based phase was previously unknown. Both compounds can be made at low temperatures (<320 degrees C) and the Fe-based phase displays an open circuit voltage of 3.83 V vs. Li+/Li-0 for the Fe3+/Fe2+ redox potential. This corresponds to the highest voltage ever obtained for the Fe3+/Fe2+ redox couple in an iron-based, fluorine-free compound and is only matched by the triplite phase of LiFeSO4F. While the theoretical capacity of 102 mA h g(-1) will likely limit the commercial prospects for this phase, knowledge of the structure will provide useful insight into the structural origin of these increased potentials. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：77 / 80

页数：4

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