TEMPERATURE-DEPENDENCE OF SODIUM-ION DIFFUSION IN NAXWO2CL2

P G  BRUCE; J  NOWINSKI; V C  GIBSON

TEMPERATURE-DEPENDENCE OF SODIUM-ION DIFFUSION IN NAXWO2CL2

P G BRUCE, J NOWINSKI, V C GIBSON

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Abstract

The diffusion of Na+ ions in a new tungsten bronze, NaxWO2Cl2, is examined. The temperature dependence of the Na+ ion self diffusion coefficient for three compositions Na0.06WO2Cl2, Na0.85WO2Cl2 and Na0.93WO2Cl2 is presented. The structure of the sodium deficient compound differs from that of the two sodium rich materials. It is noted that the activation energy is similar for Na0.85WO2Cl2 and Na0.93WO2Cl2 but significantly larger than that for Na0.06WO2Cl2 and this is interpreted in terms of mutual repulsions between the Na+ ions. The self diffusion coefficients range from 2.3 to 11.0 x 10(-13) cm2 s-1 at 75-degrees-C, these values are some four orders of magnitude lower than typical values for Li+ ion diffusion in intercalation hosts.

Original language	English
Pages (from-to)	41-45
Number of pages	5
Journal	Solid State Ionics
Volume	50
Issue number	1-2
Publication status	Published - Jan 1992

Keywords

INTERCALATION

Cite this

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title = "TEMPERATURE-DEPENDENCE OF SODIUM-ION DIFFUSION IN NAXWO2CL2",

abstract = "The diffusion of Na+ ions in a new tungsten bronze, NaxWO2Cl2, is examined. The temperature dependence of the Na+ ion self diffusion coefficient for three compositions Na0.06WO2Cl2, Na0.85WO2Cl2 and Na0.93WO2Cl2 is presented. The structure of the sodium deficient compound differs from that of the two sodium rich materials. It is noted that the activation energy is similar for Na0.85WO2Cl2 and Na0.93WO2Cl2 but significantly larger than that for Na0.06WO2Cl2 and this is interpreted in terms of mutual repulsions between the Na+ ions. The self diffusion coefficients range from 2.3 to 11.0 x 10(-13) cm2 s-1 at 75-degrees-C, these values are some four orders of magnitude lower than typical values for Li+ ion diffusion in intercalation hosts.",

keywords = "INTERCALATION",

author = "BRUCE, {P G} and J NOWINSKI and GIBSON, {V C}",

year = "1992",

month = jan,

language = "English",

volume = "50",

pages = "41--45",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - TEMPERATURE-DEPENDENCE OF SODIUM-ION DIFFUSION IN NAXWO2CL2

AU - BRUCE, P G

AU - NOWINSKI, J

AU - GIBSON, V C

PY - 1992/1

Y1 - 1992/1

N2 - The diffusion of Na+ ions in a new tungsten bronze, NaxWO2Cl2, is examined. The temperature dependence of the Na+ ion self diffusion coefficient for three compositions Na0.06WO2Cl2, Na0.85WO2Cl2 and Na0.93WO2Cl2 is presented. The structure of the sodium deficient compound differs from that of the two sodium rich materials. It is noted that the activation energy is similar for Na0.85WO2Cl2 and Na0.93WO2Cl2 but significantly larger than that for Na0.06WO2Cl2 and this is interpreted in terms of mutual repulsions between the Na+ ions. The self diffusion coefficients range from 2.3 to 11.0 x 10(-13) cm2 s-1 at 75-degrees-C, these values are some four orders of magnitude lower than typical values for Li+ ion diffusion in intercalation hosts.

AB - The diffusion of Na+ ions in a new tungsten bronze, NaxWO2Cl2, is examined. The temperature dependence of the Na+ ion self diffusion coefficient for three compositions Na0.06WO2Cl2, Na0.85WO2Cl2 and Na0.93WO2Cl2 is presented. The structure of the sodium deficient compound differs from that of the two sodium rich materials. It is noted that the activation energy is similar for Na0.85WO2Cl2 and Na0.93WO2Cl2 but significantly larger than that for Na0.06WO2Cl2 and this is interpreted in terms of mutual repulsions between the Na+ ions. The self diffusion coefficients range from 2.3 to 11.0 x 10(-13) cm2 s-1 at 75-degrees-C, these values are some four orders of magnitude lower than typical values for Li+ ion diffusion in intercalation hosts.

KW - INTERCALATION

M3 - Article

SN - 0167-2738

VL - 50

SP - 41

EP - 45

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1-2

ER -

TEMPERATURE-DEPENDENCE OF SODIUM-ION DIFFUSION IN NAXWO2CL2

Abstract

Keywords

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