Electrochemical properties of the mixed oxide Fe0.11V2O5.16 as a Li intercalation compound

被引:35
作者
Farcy, J [1 ]
Maingot, S [1 ]
Soudan, P [1 ]
PereiraRamos, JP [1 ]
Baffier, N [1 ]
机构
[1] CNRS URA 1466,LAB CHIM APPL ETAT SOLIDE,F-75231 PARIS,FRANCE
关键词
vanadium pentoxide; sol-gel process; lithium insertion; secondary lithium batteries;
D O I
10.1016/S0167-2738(97)00196-3
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
The electrochemical properties of a new mixed oxide Fe0.11V2O5.16 as a Li intercalation compound are investigated in relation with structural characteristics. The x variation of the chemical diffusion coefficient for lithium ions is determined from a.c. impedance spectroscopy measurements on a wide composition range 0<x<1.8. <(D)over tilde (Li)> is found to be strongly dependent on x in LixFe0.11V2O5.16. These results are completed by XRD investigation performed on reduced electrodes. Ferric ions located in octahedral sites of V2O5 stabs act as stabilizing agents of the host lattice in that emergence of lithiated phases related to epsilon and gamma structure is delayed towards deeper depths of discharge than in the case of LixV2O5.
引用
收藏
页码:61 / 69
页数:9
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