Sel bahan bakar oksida pejal (SOFC) adalah salah satu daripada kumpulan sel bahan bakar yang paling banyak digunakan dalam produk kejuruteraan yang berupaya menukar tenaga kimia terus kepada tenaga elektrik dan tenaga haba dengan menggunakan reaksi elektrokimia. Sel bahan bakar oksida pejal bersuhu sederhana (IT-SOFC) adalah sejenis sel yang dikendalikan pada suhu pertengahan antara 600 - 800ºC memberikan prestasi elektrokimia yang lebih baik dan mengurangkan kos bahan dan operasi. LaSrCoFeO3 (LSCF) adalah bahan katod perovskit dalam IT-SOFC yang memberikan prestasi elektrokimia yang lebih baik berbanding dengan SOFC klasik. Kajian ini menganalisa sifat kimia, fizikal dan elektrokimia komposit LSCF dengan CuO yang disintesis oleh kaedah keadaan pepejal konvensional. Serbuk yang dikalsin akan dianalisis dengan analisis difraksi sinaran (XRD), pengimbasan mikroskop elektron (SEM), analisis sinaran penyebaran tenaga (EDX), analisis termogravimetrik (TGA) dan analisis Brunauer-Emmett-Teller (BET). Data XRD menunjukkan fasa tunggal perovskit LSCF-CuO pada suhu 700ºC. Imej SEM menunjukkan saiz zarah LSCF-CuO meningkat apabila suhu kalsin meningkat. Data BET menunjukkan kawasan permukaan spesifik dan jumlah liang berkurang apabila suhu kalsin meningkat. Nilai rintangan polarisasi (Rp) terendah untuk katod LSCF-CuO ialah 0.41 Ω.cm2 pada suhu 800ºC.
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Solid oxide fuel cells (SOFC) is one of the most widely used groups of fuel cell in engineering products which converts the chemical energy directly to electrical energy and thermal energy by using electrochemical reactions. IT-SOFC is a type of fuel cell which is operated at intermediate temperature between 600 – 800ºC give a better electrochemical performance and reduce the material and operating cost. LaSrCoFeO3 (LSCF) is a perovskite cathode material commonly used in intermediate temperature solid oxide fuel cell (IT-SOFC) which give the better electrochemical performance as compared with the classical SOFC. This research investigated the chemical, physical and electrochemical characteristic of LSCF composite with CuO which synthesized by conventional solid-state method. The calcined powders were analyzed by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), thermogravimetric analysis (TGA) and Brunauer- Emmett- Teller analysis (BET). XRD data showed the single-phase perovskite LSCF-CuO at temperature 700ºC. SEM images showed the LSCF-CuO particle size increased as the calcination temperature increased. The BET showed the specific surface area and total pores volume decreased as the calcination temperature increased. The lowest polarization resistance (Rp) value for LSCF-CuO cathode was 0.41 Ω.cm2 at temperature 800ºC.
Preparation and characterization of lscf-cuo using solid state method as cathode material for intermediate temperature solid oxide fuel cell (IT-SOFC) / Muhammad Nur Ramadhan Abd Razak