Influence of Sintering Temperature on the Structural, Morphological, and Electrochemical Properties of NiO-YSZ Anode Synthesized by the Autocombustion Route

Abstract

In this study, nickel oxide–Y2O3-doped ZrO2 (NiO-YSZ) composite powder as an anode material was synthesized using a cost-effective combustion method for high-temperature solid oxide fuel cell (SOFC). Further, the effects of sintering temperatures (1200, 1300, and 1400 °C) were studied for its properties in relation to the SOFC performance. The prepared and sintered NiO-YSZ materials were characterized for their surface morphology, composition, structure, and conductivity. The cubic crystalline nature of NiO and YSZ was sufficed by X-ray diffraction, and SEM images revealed an increase in the densification of microstructure by an increase in the sintering temperature. EDX spectrum confirmed the presence of nickel, yttrium, and zirconia without any impurity. Conductivity measurements, under a hydrogen environment, revealed that NiO-YSZ, sintered at 1400 °C, exhibits better conductivity compared to the samples sintered at lower temperatures. Electrochemical performance of button-cells was also evaluated and peak power density of 0.62 Wcm−2 is observed at 800 °C. The citrate combustion method provided peak performance for cells containing anode sintered at 1200 °C, which was previously reported at higher sintering temperatures. Therefore, the citrate combustion method is found to be a suitable route to synthesize NiO-YSZ at low sintering temperature.

Synthesis and Characterization of the New Li1+xAl1+xSi1–xO4 (x = 0–0.25) Solid Electrolyte for Lithium-Ion Batteries

“…The sharp peaks are attributed to the enhancement of the crystallinity, which is important for improving the electrochemical performance of the LASO SE. 40 The XRD patterns of electrolytes sintered at temperatures of 750 °C or higher matched that of the single-phase LiAlSiO 4 phase (ICSD: 2929), but the electrolytes sintered at 700 °C or lower temperatures contained trace amounts of LiAlO 2 impurities. 41−43 These results confirmed that oxygen and silicon atoms combined during sintering at low temperatures (≤700 °C), which is undesirable.…”

High-Performance Sr0.95Fe0.8Mo0.1Ni0.1O3−δ Electrode for Reversible Symmetrical Solid Oxide Cells

“…Sr 0.95 Fe 0.9 Mo 0.1 O 3−δ (SFM) and Sr 0.95 Fe 0.8 Mo 0.1 Ni 0.1 O 3−δ (SFMN) catalysts were synthesized via a typical glycine-citric acid combustion method, similar to that in the literature [31][32][33]. All the chemicals were purchased from Sinopharm Chemical Reagent Co., Ltd (Shanghai, China).…”

Long-Term Oxidation Studies on Porous Stainless Steel 430L Substrate Relevant to Its Application in Metal-Supported SOFC

“…Solid oxide fuel cell (SOFC) is a promising power generation technology [1][2][3]. It efficiently converts chemical energy into electrical energy and reduces pollutant gas emissions compared to conventional power generation technologies.…”