Transport properties of a new Li+ ion-conducting ormolyte: (SiO2-PEG)-LiCF3SO3

Title
Transport properties of a new Li+ ion-conducting ormolyte: (SiO2-PEG)-LiCF3SO3
Authors
Whang, C.M.
Keywords
COMPOSITE SOLID ELECTROLYTES, GEL PROCESS
Issue Date
2002-09
Publisher
ROYAL SOC CHEMISTRY
Abstract
The transport properties of a new fast Li+ ion-conducting sol-gel-derived ormolyte, (SiO2-10 wt% PEG)-[Li/O] LiCF3SO3, with [Li/O] = 0-0.1 (mol/mol), is reported. The composition with [Li/O] = 0.04 exhibited the highest conductivity (sigma(25 degreesC) = 1 x 10(-4) S cm(-1)), with an enhancement of 10(3) over the host matrix (SiO2-10 wt% PEG xerogel), and has been found to be the 'optimum conducting composition'. Direct determination of Li+ ion mobility (mu) and mobile ion concentration (n) revealed that the enhancement was due to the increase in both mu and n. Studies of the variation of sigma, mu, and n versus temperature indicated that the system shows Arrhenius-type behavior. The activation energy and energies of migration and formation were evaluated from their respective Arrhenius plots. Measurement of the ion transference number (t(ion)) confirmed that the ions are the sole charge carriers in the system. These results are discussed in the light of existing theories.
URI
http://dspace.inha.ac.kr/handle/10505/20299
ISSN
0959-9428
Appears in Collections:
College of Engineering(공과대학) > Materials Science & Engineering (신소재공학) > Journal Papers, Reports(신소재공학 논문, 보고서)
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