Fabrication and performance of PEN SOFCs with proton-conducting electrolyte

Abstract

A positive-electrolyte-negative (PEN) assembly solid oxide fuel cell (SOFC) with a thin electrolyte film for intermediate temperature operation was fabricated. Instead of the traditional screen-printing method, both anode and cathode catalysts were pressed simultaneously and formed with the fabrication of nano-composite electrolyte by press method. This design offered some advantageous configurations that diminished ohmic resistance between electrolyte and electrodes. It also increased the proton-conducting rate and improved the performance of SOFCs due to the reduction of membrane thickness and good contact between electrolyte and electrodes. The fabricated PEN cell generated electricity between 600°C and 680°C using H 2 S as fuel feed and air as oxidant. Maximum power densities 40 mW · cm −2 and 130 mW · cm −2 for the PEN configuration with a MoNi-S-based composite anode, nano-composite electrolyte (Li 2 SO 4 +Al 2 O 3 ) film and a NiO-based composite cathode were achieved at 600°C and 680°C, respectively.

Closing the Gap in Formic Acid Reforming

“…Aspen Plus and Aspen Exchanger Design & Rating (EDR) are then applied in reactor simulation and process conceptual design. Physical properties in simulation are estimated by the built-in NRTL-HOC method, whose parameters are validated by experimental data [31][32][33]. Exergy (Ex) analysis is conducted within a reference environment at 298.15 K and 1 atm according to the method reported in literature [34][35][36].…”