57Fe Mossbauer study of the electrochemical reaction of Li with FeP y (y=1,2)

被引：5

作者：

Boyanov, S. ^{[1
]}

Womes, M. ^{[1
]}

Jumas, J. -C. ^{[1
]}

Monconduit, L. ^{[1
]}

机构：

[1] Univ Montpellier 2, Equipe AIME, Inst Charles Gerhardt, CNRS UMR 5253, F-34095 Montpellier 5, France

来源：

HYPERFINE INTERACTIONS | 2008年 / 187卷 / 1-3期

关键词：

Iron phosphides; Negative electrode; Lithium-ion batteries; 57Fe Mossbauer spectroscopy;

D O I：

10.1007/s10751-008-9864-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

A complete 57Fe Mossbauer study was undertaken to elucidate the electrochemical mechanism occuring during the cycling of the FeP (x) (x=2)/Li batteries. Upon discharge, for FeP, the conversion reaction FeP + 3Li Fe + Li(3)P was confirmed, whereas for FeP(2), FeP and a disordered magnetic unknown phase A are observed. On charge, the starting material is partially reconstructed only in the case of FeP. Once the first cycle is achieved, the same redox process occurs in both the FeP/Li and FeP(2)/Li cells, between LiFeP, FeP, Fe (or phase A) and Li(3)P.

引用

页码：57 / 69

页数：13

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