کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1297233 1498330 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure, electrical and thermal properties of (Ba0.5Sr0.5)1 − xGdxCo0.8Fe0.2O3 − δ perovskite as a solid-oxide fuel cell cathode
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Structure, electrical and thermal properties of (Ba0.5Sr0.5)1 − xGdxCo0.8Fe0.2O3 − δ perovskite as a solid-oxide fuel cell cathode
چکیده انگلیسی

In order to develop cathode materials for intermediate temperature solid oxide fuel cell (IT-SOFC), (Ba0.5Sr0.5)1 − xGdxCo0.8Fe0.2O3 − δ (BSGCF: x = 0, 0.02, 0.05, 0.08, and 0.1) oxides were synthesized by sol–gel method. The effects of Gd-doping on the phase structure, thermal expansion coefficient (TEC), thermogravimetric (TG) and the electrical conductivity were investigated. All samples have cubic structure and the lattice shrinks with the increasing content of Gd3 +. The TEC values of BSGCF are in the range of 20.7–22.4 × 10− 6 K− 1 from 50 to 900 °C and the abnormal expansion phenomenon at the temperature range of 300–550 °C is observed in all these samples, which is related with the loss of lattice oxygen as proved by the TG result. The conductivity of BSGCF10 is three times as large as BSCF at 500 °C. While abnormal phenomenon of BSGCF for the x = 0.05 is explained through the critical radius calculation.


► The doping effect of Gd on physical properties for BSGCF were investigated.
► The electrical conductivity of x = 0.1 reaches a maximum of 105S·cm-1 at about 450 °C.
► Abnormal phenomena of BSGCF05 is explained through the critical radius calculation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 207, 18 January 2012, Pages 38–43
نویسندگان
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