Structure characteristics and lithium ionic conductivity of La(0.57-2x/3)SrxLi0.3TiO3 perovskites

被引：21

作者：

Wang, GX ^{[1
]}

Yao, P ^{[1
]}

Bradhurst, DH ^{[1
]}

Dou, SX ^{[1
]}

Liu, HK ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Energy Storage Mat Program, Wollongong, NSW 2522, Australia

来源：

JOURNAL OF MATERIALS SCIENCE | 2000年 / 35卷 / 17期

关键词：

D O I：

10.1023/A:1004876100938

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La(0.57-2x/3)SrxLi0.3TiO3 perovskites were synthesised using a conventional solid-state reaction. Large Sr2+ ions partially substituting for La3+ ions were found to disturb the cubic perovskite structure and cause the superstructure lines to gradually decrease in the x-ray diffraction patterns and almost disappear when x = 0.12. On the contrast, there still exist superstructure diffraction spots in the electron diffraction pattern on microdomain when x = 0.12. The lithium ion conductivities of the compounds were improved in the range of 0 less than or equal to x less than or equal to 0.08, which does not obey the principle of the carrier concentration. An expansion of the unit cell and the disordering of La3+ (Sr2+), Li+ ions and vacancies in A sites could be a mechanism for the enhancement of the conductivity with Sr2+ doping. (C) 2000 Kluwer Academic Publishers.

引用

收藏

页码：4289 / 4291

页数：3

相关论文

共 12 条

[1] Synthesis and electrophysical properties of novel lithium ion conducting oxides [J].

Belous, AG .

SOLID STATE IONICS, 1996, 90 (1-4) :193-196

[2] Mechanism of ionic conduction and electrochemical intercalation of lithium into the perovskite lanthanum lithium titanate [J].

Bohnke, O ;

Bohnke, C ;

Fourquet, JL .

SOLID STATE IONICS, 1996, 91 (1-2) :21-31

[3] A distribution of activation energies for the local and long-range ionic motion is consistent with the disordered structure of the perovskite Li3xLa2/3-xTiO3 [J].

Bohnke, O ;

Emery, J ;

Veron, A ;

Fourquet, JL ;

Buzare, JY ;

Florian, P ;

Massiot, D .

SOLID STATE IONICS, 1998, 109 (1-2) :25-34

[4] IONIC-CONDUCTIVITY STUDIES ON LI1-XM2-XMX'P3O12 (M=HF, ZR - M' =TI, NB) [J].

CHOWDARI, BVR ;

RADHAKRISHNAN, K ;

THOMAS, KA ;

RAO, GVS .

MATERIALS RESEARCH BULLETIN, 1989, 24 (02) :221-229

[5] Lithium ion conductivity of polycrystalline perovskite La0.67-xLi3xTiO3 with ordered and disordered arrangements of the A-site ions [J].

Harada, Y ;

Ishigaki, T ;

Kawai, H ;

Kuwano, J .

SOLID STATE IONICS, 1998, 108 (1-4) :407-413

[6] Influences of carrier concentration and site percolation on lithium ion conductivity in perovskite-type oxides [J].

Inaguma, Y ;

Itoh, M .

SOLID STATE IONICS, 1996, 86-8 :257-260

[7] HIGH IONIC-CONDUCTIVITY IN LITHIUM LANTHANUM TITANATE [J].

INAGUMA, Y ;

CHEN, LQ ;

ITOH, M ;

NAKAMURA, T ;

UCHIDA, T ;

IKUTA, H ;

WAKIHARA, M .

SOLID STATE COMMUNICATIONS, 1993, 86 (10) :689-693

[8]

INAGUMA Y, 1995, J ELECTROCHEM SOC L, V8

[9] LITHIUM ION CONDUCTIVITY OF A-SITE DEFICIENT PEROVSKITE SOLID-SOLUTION LA0.67-XLI3XTIO3 [J].

KAWAI, H ;

KUWANO, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (07) :L78-L79

[10] Ionic conduction of lithium for perovskite type compounds, (Li0.05La0.317)1-xSr0.5xNbO3, (Li0.1La0.3)1-xSr0.5xNbO3 and (Li0.25La0.25)1-xM0.5xNbO3 (M=Ca and Sr) [J].

Kawakami, Y ;

Fukuda, M ;

Ikuta, H ;

Wakihara, M .

SOLID STATE IONICS, 1998, 110 (3-4) :187-192