Preparation of microtubular solid oxide fuel cells based on highly asymmetric structured electrolyte hollow fibers

Abstract

A simple and cost-effective method has been developed for the fabrication of microtubular solid oxide fuel cells (MT-SOFCs). Highly asymmetric electrolyte hollow fibers composed of a thin dense skin layer and a thick porous substrate are first prepared by a modified phase inversion/sintering technique. The porous substrate is then formed into the anode by deposition of a Ni catalyst via an electroless plating method inside the pores while the thin dense skin layer serves directly as the electrolyte film of the fuel cells. A porous cathode layer is produced on the outer surface of the Ni-deposited hollow fibers by slurry coating and subsequent sintering to form a complete micro tubular fuel cell. The process has been employed to fabricate yttrium stabilized zirconia (YSZ) supported Ni-YSZYSZLa 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) microtubular fuel cells. The maximum output of the resulting cells is 159.6 mW cm 2 at 800 °C when using H 2 as the fuel feed and air as the oxidant. microtubular solid oxide fuel cell, electroless plating, nickel anode, electrolyte hollow fiber

Highly stable microtubular solid oxide fuel cells based on integrated electrolyte/anode hollow fibers

“…The peak power density of the prepared MT-SOFC enhances with the impregnation cycle number or Ni loading content. It reaches 562 mW cm À2 after impregnation for ten cycles, higher than the previous work [11,12], mirroring that the vacuum-assisted impregnation has effectively improved the TPBs and anode catalytic performance. The electrochemistry impedance spectra (EIS) of the MT-SOFC were tested at 800 C under open circuit.…”

“…Such a microstructure of the Ni network within the porous YSZ matrix may lead to a high conductivity and an easy current collection. Meanwhile, no Ni agglomerate was found in the anode after repeatedly sintering, very different from the electroless plate method [12]. This uniform deposition of Ni in YSZ network is considered an efficient way to improve the three phase boundaries (TPBs), which is facilitating the electrochemical reactions.…”

Comparisons of Fastness of the Coating Processes of Electroless Silver Plating on Polyethylene Membrane Surfaces

“…International Conference on Materials Chemistry and Environmental Protection (MEEP 2015) further illuminated that the processes of brush could not well coat the silver element on PE membrane surfaces with the effects of the bigger drops on the non-infiltrated surfaces and the slighter damages of the silver element renderings of the initial attachments [24]. Those complications did course the results of the outcomes in each picture of Figure 1, where it was directly evidenced that the fastness value of 4.0 ± 0.3 in B3-1 was much higher than the other two fastness values (2.5 ± 0.3 in I3-1 and 2.0 ± 0.5 in S2-1, respectively).…”

Fabrication and characterization of BaCe0.8Y0.2O2.9-Ce0.85Sm0.15O1.925 composite electrolytes for IT-SOFCs

“…Solid oxide fuel cells (SOFCs) are the cleanest, most efficient, and cost-effective option for the direct conversion to electricity of a wide variety of fuels [1][2][3][4][5][6]. Nowadays, the research on SOFCs has been carried out around the world.…”