Composite polymer electrolytes based on lithium salts: solubility and conductivity
The paper highlights the results of composite polymer lithium-conducting films investigation. The films under discussion consist of solid polymer electrolytes filled by own lithium salt particles. The solubility limit in macromolecular solvent – fluoropolymer F-62 is determined for several salts solutions namely lithium perchlorate, hexafluorophosphate, fluoride and bromide. The composite films prepared by solvent casting from the joint solution of polymer and lithium salt with its content exceeding its solubility in polymer matrix leads to formation of large single crystals of inorganic salt. The preparation technique can hardly provide the desired uniform dispersion of filler nanoparticles. Transport characteristics of the films are determined by using impedance spectroscopy, DC interruption technique and measuring the DC resistance through the film. The ionic transport is shown to occur through both phases of composite according to their contents. Increasing of conductive filler content reduces the overall conductivity of composite electrolyte. Conductivity values of composites in a wide range of lithium salt concentration are found to be lower the conductivity values of individual phases. The most probable reason for such a behavior is connected with formation of relatively large filler particles with small interfacial area. These particles are unable to form the highly-conducting channels through the amorphous stuff.
1 Kerr JB (2009) Polymeric electrolytes: An overview. In: Lithium batteries: Science and technology. Springer, New York. http://dx.doi.org/10.1007/978-0-387-92675-9_19
2 Dias FB, Plomp L, Veldhuiz JBJ (2000) J Power Sources 88:169-191. http://dx.doi.org/10.1016/S0378-7753(99)00529-7
3 Uvarov NF (2008) Solid composite electrolytes [Kompozitsionnye tverdye elektrolity]. Novosibirsk, Russia. ISBN: 9785769210167.
4 Fan LZ, Wang XL, Long F, Wang X (2008) Solid State Ionics 179: 1772-1775. http://dx.doi.org/10.1016/j.ssi.2008.01.035
5 Stephan AM, Nahm KS (2006) Polymer 47:5952-5964. http://dx.doi.org/10.1016/j.polymer.2006.05.069
6 Vasilyev AV, Grinenko EV, Schukin AO, Fedulina TG (2007) Infrared spectroscopy of organic and natural compounds [Infrakrasnaya spectroskopiya organicheskih i prirodnyh soedineniy]. SPSAFE, Saint Petersburg, Russia.
7 Ivanov-Shits AK, Murin IV (2000) Solid State Ionics [Ionika tverdogo tela], Volume 1. SPSU Publishing, Saint Petersburg, Russia. ISBN 5288027455
8 Andreev OL, Druzhinin KV, Batalov NN, Antonov BD (2010) Russian J Appl chem+ 83:339-343. http://dx.doi.org/10.1134/S1070427210020291
9 Yahya MZA, Arof AK (2002) Eur Polym J 38:1191–1197. http://dx.doi.org/10.1016/S0014-3057(02)00355-5
10 Gurevich YY, Harkats YI (1982) Progress in Physics [Uspekhi fisicheskih nauk] 136:693-728.
11 Andreev OL, Raskovalov AA, Antonov BD, Zhuravlyov NA, Denisova TA (2012) Solid State Ionics 220:12-17. http://dx.doi.org/10.1016/j.ssi.2012.05.03212 Andreev OL, Druzhinin KV, Shevelin PYu, Batalov NN (2013) Ionics 19:33-39. http://dx.doi.org/10.1007/s11581-012-0706-z
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.