Contemporary Materials II−2 (2011)
Contemporary Materials (Renewable energy sources), II−2 (2011) Page 145 of 154
UDK 621.35/.36:541.135.5-035.4
INCREASE OF MOBILITY OF IONS IN LI-ION BATTERIES BY ULTRATHIN PHONON COATINGS OF ELECTRODES
D. Lj. Mirjanić1, J. P. Šetrajčić1,2, S. S. Pelemiš3, S. Armaković2
1 The Academy of Sciences and Arts of the Republic of Srpska, 78000 Banja Luka, Bana Lazarevića 1, Republic of Srpska, B&H
2 University of Novi Sad, Faculty of Sciences, Department of Physics, 21000 Novi Sad, Trg Dositeja Obradovića 4, Vojvodina, Serbia
3 University of Eastern Sarajevo, Faculty of Technology, Karakaj bb, 75400 Zvornik, Republic of Srpska, B&H
Abstract
This paper presents the results of research of behavior of phonon sub-system in ultrathin coatings that are applied on electrodes in Li-ion batteries and that increase the efficiency of ion transport. Using the method of Green functions it was demonstrated that in ultrathin films, increased mechanical oscillating of crystalline lattice and forming of standing waves occur, while, thermal capacitiveness and conduction of the overall coating decreases. With their increased oscillating, phonons release the ions captured on and within electrodes, and thus influence an increase in efficiency of ion conductivity.
Keywords: ion conductivity, Li-ion batteries, ultrathin films, phonons, heat capacity.
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[4] J. Hong, Ch. Wang, U. Kasavajjula, Kinetic behavior of LiFeMgPO4 cathode material for Li-ion batteries, Journal of Power Sources 162 (2006) 1289–1296.
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[7] B. S. Tošić, J. P. Šetrajčić, D. Lj. Mirjanić, Z. V. Bundalo, Low-Temperature Properties of Thin Films, Physica A, 184 (1992) 354‒366.
[8] S. G. Davison and M. Steslicka, Basic Theory of Surface States, Clarendon, Oxford (1996).
[9] M. Prutton, Introduction to Surface Physics, Clarendon, Oxfod (1995).
[10] M. Tkach, V. Holovatsky, O. Voitsekhivska, Electron and hole quasistationary states in opened cylindrical quantum wire, Physica E, 11 (2001) 17‒26.
[11] V. M. Golovach, G. G. Zegrya, A. M. Makhanets, I. V. Pronishin, N. V. Tkach, Electron and hole spectra in a superlattice of cylindrical quantum wires, Semiconductors, vol.33/5 (1999) 564‒568.
[12] J. M. Wesselinowa, On the theory of thin ferroelectric films, Phys.Stat.Sol. (b), 223 (2001) 737.
[13] J. M. Wesselinowa, Electric field dependence of phase transitions in ferroelectric thin films, Phys.Stat.Sol. (b), 229 (2002) 1329.
[14] B. S. Tošić, Statisticka fizika, PMF, Novi Sad (1978).
[15] S. Doniach, E. H. Sondheimer, Green's Functions for Solid State Physicists, Imperial College Press, London (1999).
[16] C. Kittel, Introduction to Solid State Physics, Wiley, New York (1986).
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[19] V. M. Agranovich and M. D. Galanin, Migration of Electron Energy Excitations in Condensed Matter, Nauka, Moscow (1978).
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