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Preparation of doped Ba0.5Sr0.5Co0.8Fe0.2O3-δ perovskites as cathode for solid oxide fuel cell |
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| รหัสดีโอไอ | |
| Title | Preparation of doped Ba0.5Sr0.5Co0.8Fe0.2O3-δ perovskites as cathode for solid oxide fuel cell |
| Creator | Suwichar Deehasing |
| Contributor | Soamwadee Chaianansutcharit, Oravan Sanguanruang |
| Publisher | Chulalongkorn University |
| Publication Year | 2553 |
| Keyword | Solid oxide fuel cells, Perovskite, เซลล์เชื้อเพลิงออกไซด์ของแข็ง, เพอรอฟสไกต์ |
| Abstract | The substitution of Ca²⁺ and La³⁺ ions at A-site and the addition of Ca²⁺, Cu²⁺ and Zn²⁺ ions in the structure of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃-δ (BSCF) were successfully performed by the modified citrate method. The characterization by XRD and SEM demonstrated that all samples showed the single phase of cubic ABO₃ perovskite oxide however the BSCF substituted by Ca²⁺ ion at 40 mol% in A-site still presenting small impurity phase of CaO. The electrical conductivity was increased with the increasing substitution of Ca²⁺ ion and the maximum electrical conductivity was 96 S.cm⁻¹ at 650 ℃ for the BSCCF (Ca 30 mol%). The results of O2-TPD indicated the substitution of Ca²⁺ ion in A-site showed the increasing of oxygen desorption. Furthermore, the substitution of Ca²⁺ ion in La3+ ion of the BSLCF affected the decreasing of electrical conductivity and the maximum conductivity achieved from the BSLCF was 353 S.cm-1 at 350 ℃. In addition, the electrical conductivity of the BSLCFCa₀.₀₁ showed the maximum value of 593 S.cm⁻¹ at 350 ℃ and the addition of Cu²⁺ and Zn²⁺ ions not had the affected on the electrical conductivity of materials. |
| URL Website | cuir.car.chula.ac.th |
