Lithium-Insertion Mechanism in Crystalline and Amorphous FePO4•nH2O

被引：30

作者：

Delacourt, C. ^{[1
]}

Poizot, P. ^{[1
]}

Bonnin, D. ^{[2
]}

Masquelier, C. ^{[1
]}

机构：

[1] Univ Picardie Jules Verne, Lab React & Chim Solides, UMR 6007, CNRS, F-80039 Amiens, France

[2] Ecole Super Phys & Chim Ind Ville Paris, Phys Quant Lab, F-75005 Paris, France

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2009年 / 156卷 / 07期

关键词：

X-RAY-ABSORPTION; ELECTROCHEMICAL PERFORMANCE; MAGNETIC-PROPERTIES; CATHODE MATERIAL; PHOSPHATE; FEPO4; DIFFRACTION; INTERCALATION; BEHAVIOR; LIFEPO4;

D O I：

10.1149/1.3126386

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Several techniques including electrochemical measurements, in situ X-ray diffraction, Mossbauer spectroscopy, and X-ray absorption spectroscopy (XAS) were used to study the lithium-insertion/deinsertion properties of five hydrated iron phosphates. Crystalline phosphosiderite (P-FePO4 center dot 2H(2)O) undergoes a complete two-phase lithium-insertion mechanism, giving rise to isosbestic points on the superposition of normalized XAS spectra. Lithium insertion into crystalline strengite (S-FePO4 center dot 2H(2)O) reveals a two-phase region followed by a single-phase one. Amorphous compositions a-FePO4 center dot nH(2)O are described as disordered solid mixtures of [Fe(PO4)(4)(H2O)(2)] clusters: Such a description accounts for both the presence of isosbestic points on the superposition of XAS spectra recorded at different stages of Li insertion and for the sloping open-circuit potential. (C) 2009 The Electrochemical Society. [DOI: 10.1149/1.3126386] All rights reserved.

引用

页码：A595 / A605

页数：11

共 49 条

[11] Ruthenium oxide-added quartz iron phosphate as a new intercalation electrode in rechargeable lithium cells [J].

Croce, F ;

D'Epifanio, A ;

Reale, P ;

Settimi, L ;

Scrosati, B .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (05) :A576-A581

[12] Low temperature preparation of optimized phosphates for Li-battery applications [J].

Delacourt, C ;

Wurm, C ;

Reale, P ;

Morcrette, M ;

Masquelier, C .

SOLID STATE IONICS, 2004, 173 (1-4) :113-118

[13] Synthesis and electrochemical properties of amorphous vanadates of general formula RVO4 (R = In, Cr, Fe, Al, Y) vs. Li [J].

Denis, S ;

Baudrin, E ;

Touboul, M ;

Tarascon, JM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (12) :4099-4109

[14]

Diard J.P., 1996, CINETIQUE ELECTROCHI

[15] STUDY OF FEPO4 CATALYST [J].

GADGIL, MM ;

KULSHRESHTHA, SK .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 111 (02) :357-364

[16]

Gay H. D., 1968, REV ASOC GEOL ARGENT, V23, P279

[17] Amorphous FePO4 as 3 V cathode material for lithium secondary batteries [J].

Hong, YS ;

Ryu, KS ;

Park, YJ ;

Kim, MG ;

Lee, JM ;

Chang, SH .

JOURNAL OF MATERIALS CHEMISTRY, 2002, 12 (06) :1870-1874

[18]

JAIN G, COMMUNICATION

[19] Synthesis, electrochemistry, and structural studies of lithium intercalation of a nanocrystalline Li2MnO3-like compound [J].

Jain, GR ;

Yang, JS ;

Balasubramanian, M ;

Xu, JJ .

CHEMISTRY OF MATERIALS, 2005, 17 (15) :3850-3860

[20] Combined XRD, EXAFS, and Mossbauer studies of the reduction by lithium of α-Fe2O3 with various particle sizes [J].

Larcher, D ;

Bonnin, D ;

Cortes, R ;

Rivals, I ;

Personnaz, L ;

Tarascon, JM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (12) :A1643-A1650

← 1 2 3 4 5 →