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Titolo:
Ionic interactions and transport mechanism in polyurethane electrolytes
Autore:
Fang, B; Wang, XL; Tang, XZ; Zhu, PF;
Indirizzi:
Shanghai Jiao Tong Univ, Sch Chem & Chem Technol, Shanghai 202240, PeoplesR China Shanghai Jiao Tong Univ Shanghai Peoples R China 202240 , PeoplesR China Shanghai Jiao Tong Univ, Phys & Chem Test Ctr, Shanghai 200030, Peoples R China Shanghai Jiao Tong Univ Shanghai Peoples R China 200030 Peoples R China
Titolo Testata:
JOURNAL OF APPLIED POLYMER SCIENCE
fascicolo: 4, volume: 83, anno: 2002,
pagine: 785 - 790
SICI:
0021-8995(20020124)83:4<785:IIATMI>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYMER ELECTROLYTES; CONDUCTIVITY; ASSOCIATION; COMPLEXES; NACF3SO3; OXIDE;
Keywords:
polyurethane; ionic conductivity; solid state electrolyte;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, XL Shanghai Jiao Tong Univ, Sch Chem & Chem Technol, Shanghai 202240, PeoplesR China Shanghai Jiao Tong Univ Shanghai Peoples R China 202240 R China
Citazione:
B. Fang et al., "Ionic interactions and transport mechanism in polyurethane electrolytes", J APPL POLY, 83(4), 2002, pp. 785-790

Abstract

Alternating current (AC) impedance, Fourier transform (FT)-Raman, and Fourier transform infrared (FTIR) have been conducted on solutions of poly(ethylene oxide)((MW=1000))-urethane electrolytes commingled with LiCF3SO3 as the function of temperature and salt concentration. From the analysis of the Vs(SO3) vibration, the ionic concentration of salt in various chemical environments can be calculated approximately. The spectroscopic evidence was found for the redissociated ion pairs, and ionic congeries increased with increasing temperature. AC impedance measurements is used to calculate the ionic diffusion coefficient (D-i). Investigated the various concentrations (from O/Li = 4 similar to 20) at the different temperature (40 similar to 120 degreesC), We found that the calculated values (D-i) with the Nernst-Einstein equation are higher than the direct measurement. The discrepancy increases with the increase of temperature. A good correlation between the conductivity and the ionic redissociation is determined from the Vs(SO3) vibrationband. The fraction of the "free" ion significantly corresponds to the revised Nernst-Einstein equation by using the Nernst-Einstein relation and compared with those direct measurement. (C) 2002 John Wiley & Sons, Inc. J ApplPolym Sci 83: 785-790, 2002.

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Documento generato il 12/12/19 alle ore 15:27:42