Structural and Electrochemical Characterizations of P2 and New O3-NaxMn1-yFeyO2 Phases Prepared by Auto-Combustion Synthesis for Na-Ion Batteries

被引：161

作者：

de Boisse, B. Mortemard ^{[1
,2
]}

Carlier, D. ^{[1
,2
]}

Guignard, M. ^{[1
,2
]}

Delmas, C. ^{[1
,2
]}

机构：

[1] Univ Bordeaux, CNRS, ICMCB, F-33608 Pessac, France

[2] ICMCB, IPB ENSCBP, CNRS, F-33608 Pessac, France

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2013年 / 160卷 / 04期

关键词：

PHYSICAL-PROPERTIES; POSITIVE ELECTRODE; SODIUM; INTERCALATION; DEINTERCALATION; NA0.44MNO2; INSERTION; BEHAVIOR; CATHODE;

D O I：

10.1149/2.032304jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Using auto-combustion synthesis route followed by a 1000 degrees C heat-treatment, we succeeded to prepare four Na-x(Mn,Fe)O-2 phases: P2-Na0.67Mn2/3Fe1/3O2, P2-Na0.71Mn1/2Fe1/2O2, and new Na-deficient O3-Na0.82Mn1/3Fe2/3O2 and O3-Na similar to 08Mn1/2Fe1/2O2 phases. We studied their structures by X-ray Diffraction and their electrochemical properties as positive electrode in Na-cells that were reversibly charged and discharged in the 1.5 and 3.8 V range vs. Na+/Na, leading to discharge capacities between 135 and 155 mAh.g(-1). The shapes of the cycling curves are discussed together with the stacking of the phases and the redox processes involved in the Na intercalation/deintercalation reaction. In some cases the Fe(IV) state is clearly reached. 2013 The Electrochemical Society. [DOI: 10.1149/2.032304jes] All rights reserved.

引用

页码：A569 / A574

页数：6

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