| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
|
|
|
|
Correlation of Lithium Ionic Diffusion with Nb Concentration in Li7?xLa3Zr2?xNbxO12 Evaluated by an Internal Friction Method |
| XIA Yu, WANG Xian-Ping**, GAO Yun-Xia, HU Jing, ZHUANG Zhong, GUO Li-Jun, FANG Qian-Feng, LIU Chang-Song |
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
|
|
| Cite this article: |
|
XIA Yu, WANG Xian-Ping, GAO Yun-Xia et al 2014 Chin. Phys. Lett. 31 016201 |
|
|
|
|
Abstract Solid lithium-ion conductors Li7?xLa3Zr2?xNbxO12 (x=0.25, 0.5, 1, 1.5) with cubic garnet structure are successfully prepared by a solid state reaction method, and the effects of Nb concentration on lithium ion diffusion are investigated by means of internal friction (IF) technique. A prominent relaxation-type IF peak (actually composed of two components) is observed in each Nb doped Li7La3Zr2O12 compound: with apeak PL at lower temperature and a peak PH at higher temperature. The mechanisms of the two components are suggested to be associated with two diffusion processes of lithium ions via vacancies: 48g?48g and 48g?24 d. The relaxational strength of the IF peak gradually decreases, which is accompanied by the activation energy increasing from 0.45 eV to 0.64 eV with the increasing Nb doping level. The corresponding mechanism is ascribed to originate from lattice contraction as well as the lower concentration of diffusion ions induced by the substitution of Zr4+ by Nb5+.
|
|
|
Received: 12 October 2013
Published: 28 January 2014
|
|
| PACS: |
62.40.+i
|
(Anelasticity, internal friction, stress relaxation, and mechanical resonances)
|
| |
66.30.-h
|
(Diffusion in solids)
|
|
|
|
|
|
| [1] Robertson A D, West A R and Ritchie A G 1997 Solid State Ionics 104 1[2] Thangadurai V and Weppner W 2005 Adv. Funct. Mater. 15 107[3] Thangadurai V and Weppner W 2006 J. Solid State Chem. 179 974[4] Geiger C A, Alekseev E, Lazic B, Fisch M, Armbruster T and Langner R2011 Inorg. Chem. 50 1089[5] Junji A, Norihito K, Hiroshi H and Akimoto J 2009 J. Solid State Chem. 182 2046[6] Rangasamy E, Wolfenstine J and Sakamoto 2012 Solid State Ionics 206 28[7] Buschmann H, Berendts S and Mogwitz B 2012 J. Power Sources 206 236[8] Allen J L, Wolfenstine J, Rangasamy E and Sakamoto J 2012 J. Power Sources 206 315[9] Huang M, Dumon A and Nan C W 2012 Electrochem. Commun. 21 62[10] Wang X P and Fang Q F 2002 Phys. Rev. B 65 064304[11] Matsushita K 1994 J. Alloys Compd. 211 374[12] Wang X P, Wang W G, Gao Y X Zhang T and Fang Q F 2009 Mater. Sci. Eng. A 521 87[13] Mazza D 1988 Mater. Lett. 7 205[14] Shannon R D 1976 Acta Crystallogr. 32 751[15] Nowick A S and Berry B S 1972 Anelastic Relaxation in Crystalline Solids (New York: Academic)[16] Wang W G, Wang X P, Gao Y X, Hao G L and Fang Q F 2011 Solid State Sci. 13 1760[17] Gao Y X, Zhuang Z, H Lu, Wang X P and Fang Q F 2012 Solid State Phenom. 184 116[18] Ngai K L 1994 Disorder Effects on Relaxation Processes (Heidelberg: Springer-Verlag)[19] Ngai K L, Wang Y N and Magalas L B 1994 J. Alloys Compd. 211 327[20] Ngai K L and H Jain 1986 Solid State Ionics 18 362[21] Buschmann H, D?lle J, Berendts S, Kuhn A, Bottke P, Wilkening M, Heitjans P, Senyshyn A, Ehrenberg H, Lotnyk A, Duppel V, Kienle L and Janek J 2011 Phys. Chem. Chem. Phys. 13 19378[22] Jalem R, Yamamoto Y, Shiiba H, Nakayama M, Munakata H, Kasuga T, Kanamura K 2013 Chem. Mater. 25 425[23] Adams S and Rao R P 2012 J. Mater. Chem. 22 1426[24] Xu M, Park M S, Lee J M, Kim T Y, Park Y S and Ma E 2012 Phys. Rev. B 85 052301 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
