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research-article

Ternary alkali carbonates effect on electrochemical characterization of nanocomposite calcium doped ceria electrolytes (LNK-CDC) for SOFC

[+] Author and Article Information
Zohaib Ur Rehman

Defense Road Off Raiwind Road Lahore, Punjab 54000 Pakistan zur626@gmail.com

Ghazanfar Abbas

Defense Road Off Raiwind Road Lahore, Punjab 54000 Pakistan mian_ghazanfar@hotmail.com

Muhammad Ashfaq Ahmad

Defense Road Off Raiwind Road Lahore, Punjab 54000 Pakistan maahmad@ciitlahore.edu.pk

Rizwan Raza

Defence Road, off Raiwind Road Lahore Lahore, Punjab 54000 Pakistan razahussaini1980@yahoo.com

M. Ajmal Khan

Defense Road Off Raiwind Road Lahore, Punjab 54000 Pakistan ajmalkhan@cuilahore.edu.pk

Rida Batool

Department of Environmental Sciences, Fatima Jinnah Women University , Rawalpindi, Punjab 46000 Pakistan deebajzaidi@gmail.com

Faizah Altaf

C/O Najeeb Altaf Elixer Securities Pakistan, Office Number No 507, 5th Islamabad, Federal Capital Area  FCA 44000 Pakistan faizahaltaf@gmail.com

Rohama Gill

Department of Environmental Sciences, Fatima Jinnah Women University Rawalpindi, Punjab 46000 Pakistan rohama_gill@hotmail.com

Fida Hussain

Park Road Chak Shahzad Campus Islamabad, Federal 44000 Pakistan fidahamdards@gmail.com

1Corresponding author.

Manuscript received September 12, 2018; final manuscript received April 3, 2019; published online xx xx, xxxx. Assoc. Editor: Nianqiang Wu.

ASME doi:10.1115/1.4043490 History: Received September 12, 2018; Accepted April 06, 2019

Abstract

The entire world is facing the great shortfall in the energy supply due to high consumption rate of fossil-fuel based energy resources. Solid oxide fuel cells (SOFCs) are the best alternative energy devices, which convert hydrogen fuel directly into electricity. Alkali carbonated calcium doped ceria electrolytes (LNK-CDC) as (Ce0.8 Ca0.2), (Ce0.7 Ca0.3) and (Ce0.6 Ca0.4) were synthesized by co-precipitation method. With the addition of alkali carbonate nano-composite of ceria are well preserved after sintered at 600 to 700 °C. The structural and morphological properties were examined by XRD and SEM. Crystallite sizes were found in the range of 50 to 80 nm. The maximum ionic conductivity of LNK-CDC (Ce0.8Ca0.2) was achieved to be 0.14 S/cm at 650°C for anion vacancy migration by dense microstructure. The minimum activation energy was determined to be 0.23 eV. The FTIR spectra of prepared materials show the absorbance of IR and their behavior. The maximum power density of symmetric fuel cells LNK-CDC sandwiched with LNCZ oxide electrodes were recorded 0.52Wcm-2 at 650°C in the presence of hydrogen (fuel). It is suggested that coating of equal molar ratio of ternary alkali metals on ceria doped comparatively enhance the performance of new nano-composite electrolyte for SOFC and other energy application.

Copyright © 2019 by ASME
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