An efficient Sm and Ge co-doped ceria nanocomposite electrolyte for low temperature solid oxide fuel cells. Issue 1 (January 2018)

• Record Type: Journal Article
• Authors: Arshad, Muhammad Sarfraz; Raza, Rizwan; Ahmad, M. Ashfaq; Abbas, Ghazanfar; Ali, Amjad; Rafique, Asia; Ullah, M. Kaleem; Rauf, Sajid; Asghar, M. Imran; Mushtaq, Naveed; Atiq, Shahid; Naseem, Shahzad
• Is Part Of: Ceramics international. Volume 44:Issue 1(2018)
• Page Start: 170
• Page End: 174
• Publication Date: 2018-01
• Subjects: SOFCs Solid Oxide Fuel Cells -- FC Fuel cell -- Ge Germanium -- Sm Samarium -- XRD X-ray diffraction -- UV―Vis Ultraviolet–visible -- SEM scanning electron microscopy -- OCV open circuit voltage -- V Volts -- LTSOFCs low temperature Solid Oxide Fuel Cells -- SGeDC samarium and germanium co-doped ceria -- YSZ yttria stabilized zirconia -- SDC samarium doped ceria -- NC sodium carbonate (Na2CO3) -- Nd Neodymium -- Ce cerium -- Na2CO3 sodium carbonate -- BSDC Barium and samarium doped ceria -- SDCI samarium and indium co-doped ceria -- AC Alternating Current -- dc direct current -- EIS Electrochemical Impedance Spectroscopy -- S/cm Siemen per centimeter -- mWcm−2 milliwatts per square centimeter -- Pmax maximum peak power density -- La Lanthanum -- Mg Magnesium -- DCE distributed circuit element -- MPa mega Pascal -- Hz Hertz -- MHz mega Hertz -- Ea activation energy -- T temperature -- k Boltzmann constant -- σ0 pre-exponential factor -- min minutes -- fig. figure -- FESEM field emission scanning electron microscopy -- EDX Energy-dispersive X-ray spectroscopy -- L inductance -- R resistance -- Q constant phase element -- Å Angstrom -- A exponential factor -- C degree centigrade -- Zim imaginary impedance -- Zre real impedance -- α alpha -- β beta -- σ conductivity; Electrolyte -- Solid oxide fuel cells -- Germanium -- Nanocomposite -- Morphology; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.09.155
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study we present a new nanocomposite electrolyte based on samarium (Sm) and germanium (Ge) co-doped ceria Ce0.7 Sm0.15 Ge0.15 O2-δ (SGeDC). The nanocomposite electrolyte was prepared using co-precipitation method. The crystal structure and surface morphology were determined using x-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Four probe dc conductivity indicated the value of 0.074 S/cm at 650 °C. The Fuel cell performance was carried out using hydrogen as fuel. The maximum OCV observed was 0.95 V while the peak power density came out to be 600 mW/cm 2 at 600 °C. It is suggested that adding Ge, the conductivity as well as performance of this new nanocomposite electrolyte is comparatively enhanced and it can find potential applications in low temperature solid oxide Fuel cells (LTSOFCs). Highlights: Nanocomposite electrolyte (SGeDC) was prepared using co-precipitation. dc conductivity value recorded is 0.074 S/cm. Maximum value of OCV was 0.95 V and peak power density 600 mW/cm 2 at 600 °C. Potential applicant as electrolyte for LTSOFCs.