Spark plasma sintering of Al substituted LiHf2(PO4)3 solid electrolytes

被引：31

作者：

Chang, CM

Hong, SH ^{[1
]}

Park, HM

机构：

[1] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151742, South Korea

[2] Seoul Natl Univ, Nanosyst Inst, Natl Core Res Ctr, Seoul 151742, South Korea

[3] Korea Res Inst Stand & Sci, New Mat Evaluat Ctr, Taejon 305600, South Korea

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 35-36期

关键词：

lithium hafnium phosphate; spark plasma sintering; ionic conductivity; NASICON;

D O I：

10.1016/j.ssi.2005.07.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al substituted Li1+xAlxHf2-x(PO4)(3) (x=0.0 similar to 0.5) solid electrolytes were prepared by conventional sintering (CS) and spark plasma sintering (SPS), and the Li+ ion conductivity of the sintered pellets was examined using an impedance analyzer. All the samples exhibited a rhombohedral NASICON-type structure. SPS improved the densification compared to CS, and A1 substitution further increased the sample density resulting in a maximum density of similar to 90%. The Li+ ion conductivity increased in proportion to the sample density and the highest conductivity of 1.1 x 10(-4) Scm(-1) was found in the Li1.5Al0.5Hf1.5(PO4)(3) SPS specimen, which is comparable to the best value reported elsewhere. The activation energy of the total conductivity (bulk+grain boundary) reduced from 0.39 to 0.28 eV with Al substitution. The enhanced conductivity was discussed in terms of the densification, bottleneck size, and lithium ion content. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：2583 / 2587

页数：5

共 17 条

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