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Title: Cathode materials for intermediate temperature solid oxide fuel cells
Authors: Bhoga, S S
Khandale, A P
Keywords: Mixed ionic-electronic conductor;Electrochemical impedance spectroscopy;Dc electrical conductivity
Issue Date: May-2013
Publisher: NISCAIR-CSIR, India
Abstract: The superfine crystallites of Nd1.8Ce0.2CuO4+δ are obtained when prepared by mechanochemical reaction using different process control agents. The crystallite size, Cs = 34 nm is the smallest for Nd1.8Ce0.2CuO4+δ prepared using salicylic acid process control agent (NCCO(Sa)) as compared to others. The dc conductivity (1.64 S cm-1) is the highest for NCCO(Sa) amongst all, which is attributed to the smallest crystallite size and high sintered density. The agglomeration of superfine grains leads to optimal distribution of nano-pores results in low area specific resistance (1.1 ohm cm2) for the NCCO(Sa). The electrochemical performance suggests adsorption of oxygen by cathode as rate-limiting step. The proposed mechanochemical reaction is useful as a technique for the synthesis of materials with submicron-sized crystallites.
Page(s): 305-309
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.51(05) [May 2013]

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