Ion relaxation dynamics and nearly constant loss behavior in polymer electrolyte.
作者： B. Natesan , N. K. Karan , R. S. Katiyar
DOI: 10.1103/PHYSREVE.74.042801
关键词: Relaxation (physics) 、 Thermodynamics 、 Debye–Falkenhagen effect 、 Electrolyte 、 Polymer 、 Ion 、 Conductivity 、 Materials science 、 Ionic bonding 、 Ionic conductivity
摘要: The broadband conductive spectroscopy covering the range 10(-2) to 10(6) Hz has been employed examine both ionic and segmental motions in polymer salt complexes (PSCs), consisting of polyethylene oxide (PEO), LiClO4, or LiCF3SO3. temperature dependence dc conductivity analyzed using Vogel-Tamman-Fulcher (VTF) equation results suggest that can be well described terms free volume changes with temperature. ac at low temperatures (below 223 K) remains unchanged temperature, exhibiting nearly linear frequency dependence. This observation, not previously reported polymers, indicates clearly constant loss (NCL) phenomenon, usually observed glassy ceramic ion conductors, is also operative electrolytes. Furthermore, a crossover from NCL cooperative hopping higher observed. analysis conductivities demonstrates there exists direct correlation between relaxation processes.
harvard.edu
sci-hub.se 参考文章(21)
D.E. Fenton, J.M. Parker, P.V. Wright, Complexes of alkali metal ions with poly (ethylene oxide) Polymer. ,vol. 14, pp. 589- ,(1973) , 10.1016/0032-3861(73)90146-8
C. A. Angell, C. Liu, E. Sanchez, Rubbery solid electrolytes with dominant cationic transport and high ambient conductivity Nature. ,vol. 362, pp. 137- 139 ,(1993) , 10.1038/362137A0
Raymond M. Fuoss, Electrical Properties of Solids. VII. The System Polyvinyl Chloride-Diphenyl Journal of the American Chemical Society. ,vol. 63, pp. 378- 385 ,(1941) , 10.1021/JA01847A012
Michel Armand, Polymer solid electrolytes - an overview Solid State Ionics. pp. 745- 754 ,(1983) , 10.1016/0167-2738(83)90083-8
R. Edward Barker, Mobility and Conductivity of Ions in and into Polymeric Solids Pure and Applied Chemistry. ,vol. 46, pp. 157- 170 ,(1976) , 10.1351/PAC197646020157
Mark A. Ratner, Duward F. Shriver, Ion Transport in Solvent-Free Polymers Chemical Reviews. ,vol. 88, pp. 109- 124 ,(1988) , 10.1021/CR00083A006
Guomin Mao, Ricardo Fernandez Perea, W. Spencer Howells, David L. Price, Marie-Louise Saboungi, Relaxation in polymer electrolytes on the nanosecond timescale. Nature. ,vol. 405, pp. 163- 165 ,(2000) , 10.1038/35012032
Piercarlo Mustarelli, Claudio Capiglia, Eliana Quartarone, Corrado Tomasi, P. Ferloni, Laura Linati, Cation dynamics and relaxation in nanoscale polymer electrolytes: A 7 Li NMR study Physical Review B. ,vol. 60, pp. 7228- 7233 ,(1999) , 10.1103/PHYSREVB.60.7228
B. Wang, S. Q. Li, S. J. Wang, Correlation between the segmental motion and ionic conductivity of poly(ether urethane)- LiClO 4 complex studied by positron spectroscopy Physical Review B. ,vol. 56, pp. 11503- 11507 ,(1997) , 10.1103/PHYSREVB.56.11503
P. Lightfoot, M. A. Mehta, P. G. Bruce, Crystal Structure of the Polymer Electrolyte Poly(ethylene oxide)3:LiCF3SO3. Science. ,vol. 262, pp. 883- 885 ,(1993) , 10.1126/SCIENCE.262.5135.883