کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1295742 1498415 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spark plasma sintering of Al substituted LiHf2(PO4)3 solid electrolytes
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Spark plasma sintering of Al substituted LiHf2(PO4)3 solid electrolytes
چکیده انگلیسی

Al substituted Li1 + xAlxHf2 − x(PO4)3 (x = 0.0∼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 Al substitution further increased the sample density resulting in a maximum density of ∼90%. The Li+ ion conductivity increased in proportion to the sample density and the highest conductivity of 1.1 × 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 35–36, 15 November 2005, Pages 2583–2587
نویسندگان
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