High temperature structural stability, electrical properties and chemical reactivity of NdBaCo_2−xMn_xO_5+δ (0 ≤ x ≤ 2) for use as cathodes in solid oxide fuel cells

Abstract

TGA for NdBaCo2−xMnxO5+δ in air with heating/cooling at 2 °C min−1 and an intermediate step at 800 °C for 6 h.

Effect of A-Site Cation Ordering on Chemical Stability, Oxygen Stoichiometry and Electrical Conductivity in Layered LaBaCo2O5+δ Double Perovskite

“…The A-site cation ordering does not have significant impact on the TEC values. TEC of LaBaCo 2 O 5+δ is higher than for other LnBaCo 2 O 5+δ materials such as NdBaCo 2 O 5+δ [2] and GdBaCo 2 O 5+δ [41]. The values reported for La 0.5 Ba 0.5 CoO 3-δ are in good agreement with previous reports [7].…”

“…Layered double perovskite (LDP) materials with mixed ionic-electronic conductivity and high catalytic activity have been heavily investigated because of their potential application in electrochemical devices such as solid oxide fuel cells (SOFC) [1,2,3,4,5,6,7,8] or gas separation membranes [9,10]. These materials are described with a general formula Ln Ba M 2 O 5+δ where Ln is a lanthanide metal or Y and M is a transition metal.…”

Evaluation of Ba deficient NdBaCo2O5+δ oxide as cathode material for IT-SOFC

“…On average, the conductivity values of all the samples largely meet the requirements for application in IT-SOFCs (over 100 S/cm at 600-700°C), in line with literature results obtained with similar double-layered perovskite oxides [3,15,16,25,26] and with the measurements reported for NBC samples [8,27,28]. In the low temperature region, at T < 250°C, a moderate loss of conductivity is observed for NBC0 and NBC10, while the conductivity maintains almost constant in NBC5.…”

Redox behavior of the SOFC electrode candidate NdBaMn2O5+δ investigated by high-temperature in situ neutron diffraction: first characterisation in real time of an LnBaMn2O5.5 intermediate phase

“…The oxygen content was determined via iodometric titration against a standardized sodium thiosulfate solution according to the procedure reported elsewhere 5,6 . Thermogravimetric analysis (TGA) was carried out with a Netzsch STA 449 F3 instrument.…”

“…Recently, a particular class of double perovskite manganites, LnBaMn2O5+ (Ln = lanthanide), in which the Ln 3+ and Ba 2+ cations order in alternating layers, have drawn considerable attention as electrode materials for SOFCs and SOECs as well as having potential as oxygen storage materials [5][6][7][8][9] .…”