LI, Huan; SUN, Li-Ping; FENG, Qingmao; HUO, Li-Hua; ZHAO, Hui; BASSAT, Jean-Marc.; ROUGIER, Aline; FOURCADE, Sébastien; GRENIER, Jean-Claude

doi:10.1007/s10008-016-3364-7

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LI, Huan
Heilongjiang University [Harbin]

SUN, Li-Ping
Heilongjiang University [Harbin]

FENG, Qingmao
Heilongjiang University [Harbin]

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Journal of Solid State Electrochemistry. 2017, vol. 21, n° 1, p. 273-280

Springer Verlag

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The electrochemical performance of Pr2NiMnO6 (PNMO)-xCe0.9Gd0.1O1.95 (CGO) (x = 0–40 wt%) composite oxides as intermediate-temperature solid oxide fuel cell (IT-SOFC) cathode materials are evaluated. The electrochemical impedance spectroscopy (EIS) analysis results identify two consecutive electrode processes on the composite cathode. Among the various composites, PNMO-30CGO cathode exhibits the best electrochemical performance with the minimum polarization resistance of 0.23 Ω cm2 and the maximum exchange current density of 75 mA cm−2 at 700 °C in air. These values are almost constant even after 30-h operation. The oxygen reduction reaction (ORR) mechanism studies prove that the major rate-determining step is the charge-transfer process. Introducing CGO significantly improves the charge-transfer process, by increasing the triple phase boundary (TPB) length and oxygen vacancy concentration in the composite cathode.< Leer menos

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Solid oxide fuel cells

Double perovskite

Composite cathode

Oxygen reduction reaction mechanism

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Investigation of Pr2NiMnO6‐Ce0.9Gd0.1O1.95 composite cathode for intermediate-temperature solid oxide fuel cells

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