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J. Korean Ceram. Soc. > Volume 60(2); 2023 > Article
Journal of the Korean Ceramic Society 2023;60(2): 272-282.
doi: https://doi.org/10.1007/s43207-022-00261-6
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
Correspondence  Muhammad Zubair Khan ,Email: zubair.khan@fcm3.paf-iast.edu.pk
Muhammad Kashif Khan ,Email: kashifkhan@skku.edu
Received: August 11, 2022; Revised: October 6, 2022   Accepted: October 20, 2022.  Published online: November 28, 2022.
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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