Facile and low-temperature synthesis approach to fabricate Sm0.5Sr0.5CoO3−δ cathode material for solid oxide fuel cell |
Sheraz Ahmed1, Wajahat Waheed Kazmi2,3, Amjad Hussain2,3, Muhammad Zubair Khan4, Saira Bibi4, Mohsin Saleem5, Rak Hyun Song2,3, Zaman Sajid6, Abid Ullah2,3, Muhammad Kashif Khan7,8 |
1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, South Korea 2Korea Institute of Energy Research, 152 Gajeong-Ro, Yuseong-Gu, Daejeon 34129, South Korea 3University of Science and Technology (UST), 217 Gajeong-Ro Yuseong-Gu, Daejeon 34113, South Korea 4Department of Materials Science & Engineering, Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology, Mang, Haripur 22621, Khyber Pakhtunkhwa, Pakistan 5School of Chemical and Materials Engineering (SCME) and School of Interdisciplinary Engineering & Sciences, National University of Sciences & Technology (NUST), H-12, Islamabad 44000, Pakistan 6Ocean Nexus Center, University of Washington , Box 355674, Seattle, WA 98195-5674, USA 7School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, South Korea 8School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, South Korea |
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Received: August 11, 2022; Revised: October 6, 2022 Accepted: October 20, 2022. Published online: November 28, 2022. |
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ABSTRACT |
Herein, we report a facilely synthesized Sm0.5Sr0.5CoO3 (SSC) nano-catalyst as a cathode material for the solid oxide fuel cell (SOFC). The SSC nano-catalyst was synthesized by a sol–gel process using citric acid and metal nitrates and calcination was performed at a relatively low temperature of 1250 ᕑ. The crystallinity and morphology of the catalyst were observed by the X-ray diff raction and scanning electron microscope. The average particle size of the SSC powder was 100 nm after calcination at 1250 °C. The resulting SSC material was employed as a cathode for the SOFC. The SOFC cell with highly active SSC showed a peak power density of 900 mWcm−2 at 700 °C. The single cell with an SSC cathode showed excellent stability under the accelerated operating conditions of 0.5A/cm2 and 650 °C for 1250 min. The cell performance was enhanced during the initial hours of the long-term operation which is attributed to the cathode activation process and improved cathode/buffer layer interface contact. This work features a cost-effective, scalable, and reproducible method for the production of highly robust SSC cathode material for the SOFC under relatively low calcination temperatures. |
Key words:
Nano-catalyst · Solid oxide fuel cell · Synthesis · Cathode · Performance |
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