Thermal and electrochemical properties of layered perovskite PrBaCo2−xMnxO5+δ (x = 0.1, 0.2 and 0.3) cathode materials for intermediate temperature solid oxide fuel cells. (28th September 2015)

• Record Type: Journal Article
• Authors: Guo, Weina; Guo, Ruisong; Liu, Lan; Cai, Guanglan; Zhang, Chao; Wu, Chen; Liu, Zhichao; Jiang, Hong
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 36(2015)
• Page Start: 12457
• Page End: 12465
• Publication Date: 2015-09-28
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.07.136
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">Layered perovskite PrBaCo<sub>2−<italic>x</italic></sub>Mn<sub><italic>x</italic></sub>O<sub>5+<italic>δ</italic></sub> (PBCM-<italic>x</italic>, <italic>x</italic> = 0.1, 0.2 and 0.3) oxides have been synthesized and investigated as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOCFs). The effects of Mn contents in PBCM-<italic>x</italic> materials on the crystal structure, chemical stability, thermal expansion coefficient (TEC) and electrochemical properties have been studied. XRD results have showed that the lattice parameters increase with <italic>x</italic> increasing from 0.1 to 0.3, although the crystalline structure does not change. The substitution of Co by Mn lowers the thermal expansion coefficient clearly. The average TEC decreases from 22.8 × 10<sup>−6</sup> K<sup>−1</sup> for PBCM-1 to 15.1 × 10<sup>−6</sup> K<sup>−1</sup> for PBCM-3 in the temperature range of 35–800 °C. The PBCM-<italic>x</italic> samples exhibit a semiconductor to metal transition. All the samples reach the general required electrical conductivity value of cathode material at the operating temperature range of 600–800 °C. Among the samples, PBCM-2 shows the best electrochemical performance. The single fuel cell with the configuration of PBCM-2/YSZ/Pt delivers the highest power density of 304.2 mW cm<sup>−2</sup> at 800 °C.</p> </sec> </abstract>