Synthesis, structure and electrochemical properties of layered La2Li2x(CO3)1-xO2+2x

被引：1

作者：

Iqbal, Muhammad ^{[1
,3
]}

Kobayashi, Genki ^{[2
]}

Hirayama, Masaaki ^{[1
]}

Kanno, Ryoji ^{[1
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Midori Ku, Yokohama, Kanagawa 2268502, Japan

[2] Kanagawa Univ, Fac Engn, Dept Mat & Life Chem, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan

[3] Quaid I Azam Univ, Natl Ctr Phys, Islamabad 45320, Pakistan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2013年 / 206卷

关键词：

Solid electrolyte; Oxide ion conduction; Carbonate compounds; Structure analysis; Conduction mechanism; CARBONATE COMPOSITE ELECTROLYTES; OXIDE FUEL-CELLS; POWDER DIFFRACTION; ION;

D O I：

10.1016/j.jssc.2013.06.024

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

An oxide ion conductor, La2Li2x(CO3)(1-x)O2+x (x=0.15), was synthesized using a solid-state reaction, and its structure was subsequently determined by Rietveld refinement analyses of synchrotron X-ray and high-resolution powder neutron diffraction data. These analyses determined that carbonate groups are situated between (La2O22+)(n) layers in an ordered arrangement and that both oxygen vacancies and interstitial oxygen ions exist within the carbonate layers, resulting in a composition of La2Li0.3 (CO3)(0.85)O-2.3. This material is structurally stable up to 500 degrees C and exhibits a conductivity of 5.5 x 10(-5) S cm(-1) at 450 degrees C. Oxide vacancies associated with carbonate anions appear to be responsible for the ionic conduction observed in this material. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：14 / 19

页数：6

共 15 条

[1] STRUCTURE DETERMINATIONS OF LA2O2CO3-II AND THE UNUSUAL DISORDERED PHASE LA2O2.52(CO3)0.74LI0.52 USING POWDER DIFFRACTION [J].