Browsing by Author "Muddasir Ammar"

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    The Coated Carbonates on Silicon Carbide Materials as an Electrolyte and it's Electrochemical Characterization
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2022) Muddasir Ammar; CIIT/FA20-RPH-040/LHR; Dr. Shahzada Qamar Hussain; LHR TP 7996
    In this work we synthesized Silicon Carbide and Coated Carbonate on Silicon Carbide composite as an effective electrolyte material in fuel cell. Fuel cell is considered an efficient device for its clean energy production. To enhance the efficiency of such type of clean energy devices an efficient electrolyte material is required for its proper working. Therefore, in this research work Si- C composite was made by hydrothermal method and Solid-state method. While coated the Sodium Carbonate (Na2CO3) and Potassium Carbonate (K2CO3) on Si-C by dip coating method. To analyze the structural and phase properties of the synthesized samples FTIR has been carried out. Through FTIR spectra various types of stretching and vibrational bonding were studied and find out that there were different kinds of bonding like Si-O-Si, Si-C and C=O present in the prepared samples. UV- Visible spectroscopy was carried out to study the optical bandgap of the prepared samples. Conductivity and electrical bandgap for all composite material was measured by using EIS and the maximum conductivity was found 0.082 Scm-1 at a temperature of 650oC for the sample Si-C (1:1). Furthermore, the three-layer fuel cell was fabricated in which prepared material use as electrolyte and LiNiCuZn as cathode and Anode. The maximum Voc of 0.89 V wi th highest power density of 16.5 (mWCm-2) was recorded by using hydrogen as a fuel.
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    The Investigation of Electrolytic Properties of Silicon Carbide for Fuel Cell
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2020) Muddasir Ammar; FA16-BPH-055; Dr. Muhammad Ashfaq Ahmad; LHR TP 5931
    This report is devoted to the synthesis of silicon carbide based composite as an electrolyte material for fuel cell. As fuel cell is an efficient device due to its clean energy production. To enhance the efficiency of such type of clean energy devices an efficient electrolyte material is required for its proper working. Silicon carbide is well known because of semiconductor and excellent potential in energy devices due to its better electrical and mechanical properties. It has maximum avalanche breakdown, best thermal conduction, non-oxide behavior, high melting point. In this research project Si-C composite was synthesized by solid state reaction. To study the structural properties of the synthesized samples XRD has been carried out and find out the crystallite size average 28.069nm. Through 4-probe method measured its electrical conductivity which was 0.4Scm-1at 700oC. Then fabricate three-layer pellet like device for fuel cell. Using SiC as electrolyte material, and LNCZ as electrode material. By providing hydrogen as a fuel measure electrochemical behavior of cell. The highest power density was 36 mWcm-2, and maximum 0.68V open circuit voltage.