Exchange current densities at Li | Li7La3Zr2O12 interface
Solid electrolyte Li7La3Zr2O12 was synthesized by a citrate-nitrate technique. Single-phase of the synthesized compound was established by X-ray diffraction method. The pellets of Li7La3Zr2O12 were hydrostatic pressed at 500 MPa and annealed at 1180°C for 1 h. Absence of through porosity in the obtained samples was confirmed by a kerosene technique at room temperature. Symmetrical electrochemical cell with reversible lithium electrodes was assembled to determine the current exchange densities at Li | Li7La3Zr2O12 interface. Polarization curves were obtained by the linear potential sweep for the studied cell. The form of the obtained curves is close to the Tafel form. So, it was concluded that a rate-determining step in the system Li | Li7La3Zr2O12 | Li refers to the process of lithium transfer at the interface. From the obtained polarization curves exchange current densities was calculated. The exchange current densities reach values of 30 mA/cm2 at temperatures above 400°C. The obtained values of the current densities are sufficient for practical application of Li7La3Zr2O12 as solid electrolyte in primary and secondary lithium current sources.
1 Murugan R, Thangadurai V, Weppner W (2007) Angew Chem Int Edit 46:7778-7781. http://dx.doi.org/10.1002/anie.200701144
2 Kotobuki M, Munakata H, Kanamura K, Sato Y (2010) J Electrochem Soc 157:A1076-A1079. http://dx.doi.org/10.1149/1.3474232
3 Awaka J, Kijima N, Hayaka H (2009) J Solid State Chem 182:2046-2052. http://dx.doi.org/10.1016/j.jssc.2009.05.020
4 Ilina EA, Andreev OL, Antonov BD, Batalov NN (2012) J Power Sources 201:169-173. http://dx.doi.org/10.1016/j.jpowsour.2011.10.108
5 Adams S, Rao RP (2012) J Mater Chem 22:1426-1434. http://dx.doi.org/10.1039/C1JM14588F
6 Li Y, Han J, Wang C (2012) J Power Sources 209:278-281. http://dx.doi.org/10.1016/j.jpowsour.2012.02.100
7 Damaskin BB (1965) Principles of modern methods of study of electrochemical reactions. [Printsipy sovremennyh metodov izucheniya elektrohimicheskih reaktciy]. Publishing House of MSU, Moscow, Russia.
8 Bard AJ, Faulkner LR (2001) Electrochemical Methods: Fundamentals and Applications. Second Ed. Wiley, New York, USA.
9 Sluyters JH (1960) Recl Trav Chim Pay-B 79:1092-1100. http://dx.doi.org/10.1002/recl.19600791013
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