Ascendable method for the fabrication of micro-tubular solid oxide fuel cells by ram-extrusion technique

Jorge Durango-Petro, Jonathan Usuba, Hernan Valle, Gonzalo Abarzua, Host Flies, R. Udayabhaskar, R. V. Mangalaraja

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We elaborated a new ceramic paste formulation as a pre-step to ram extrusion process for obtaining porous and mechanically sustainable microtubular anodes. The methodology reported here can establish a scalable fabrication pathway for anode-supported microtubular solid oxide fuel cells (MT-SOFCs). We succeeded in the fabrication of NiO–Ce0.9Gd0.1O2-δ (NiO-CGO) based MT-anodes from a ceramic paste which comprised of α-cellulose and ethyl cellulose as pore former and binder, respectively. The quantity of the pore former was optimized and 15 wt % of pore former was elected as the superior, based on the microstructure and mechanical behavior. The sintered (at 1450 °C) microtubular (MT-anodes) exhibited an excellent mechanical strength of ~60 MPa as flexural strength (modulus of rupture) with 0.23% of deformation resistance. The obtained MT-anodes were used as a support for the fabrication of MT-SOFCs prototype with configuration such as Ni-CGO/CGO/LSFC-CGO for anode/electrolyte/cathode, respectively. The ceramic nanocomposites NiO–Ce0.9Gd0.1O2-δ (Ni-CGO), and La0.6Sr0.4Fe0.8Co0.2O3–Ce0.9Gd0.1O2-δ (LSFC-CGO) were synthetized by one-step solution combustion method and characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM) analysis. The fabricated MT-SOFC prototype generated a maximum power density of 0.595 W/cm2 at 600 °C signified the worth of the proposed paste formulation.

Original languageEnglish
Pages (from-to)2602-2611
Number of pages10
JournalCeramics International
Volume46
Issue number3
DOIs
StatePublished - 15 Feb 2020
Externally publishedYes

Keywords

  • Anode
  • Ceramic paste
  • Extrusion
  • Micro-tubular
  • Pore former

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