KINETICS OF INTERCALATION OF LITHIUM AND SODIUM INTO (PBS)1.14(NBS2)2

被引：16

作者：

HERNAN, L ^{[1
]}

MORALES, J ^{[1
]}

SANCHEZ, L ^{[1
]}

TIRADO, JL ^{[1
]}

机构：

[1] UNIV CORDOBA,FAC CIENCIAS,QUIM INORGAN LAB,SAN ALBERTO MAGNO S-N,E-14004 CORDOBA,SPAIN

来源：

CHEMISTRY OF MATERIALS | 1993年 / 5卷 / 08期

关键词：

D O I：

10.1021/cm00032a022

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 and transport properties of the intercalation of Li and Na into (PbS)1.14-(NbS2)2, a misfit layer compound, have been investigated. The open-circuit voltage (OCV) of the lithium cell gradually decreases with increasing lithium content, while the OCV of Nax(PbS)1.14-(NbS2)2 shows the appearance of a voltage plateau in the range of composition 0.1 < x < 0.25. This different behavior has been correlated with the chemical diffusion coefficients obtained by a long-pulse galvanostatic technique. While the chemical diffusivity of lithium increased with composition and had a maximum of approximately 1.3 X 10(-9) cm2 s-1 for composition 0.4 < x < 0.5, the diffusion coefficients of Na+ were found to decrease slowly in the range 0.05 < x < 0.2, where the voltage-composition curve showed a two-phase region supported by the related X-ray data. On the other hand, the standard free energies of intercalation for sodium intercalates are less negative than those found for the respective lithium intercalated compounds.

引用

页码：1167 / 1173

页数：7