Solid Oxide Electrochemical Cells for Nitrogen and Oxygen Production

Xiufu Sun, Francesco Mondi, Patricia Rabelo Monich, Stéven Pirou, Henrik Lund Frandsen, Peter Vang Hendriksen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This work presents an efficient electrochemical process for N2 and O2 production based on a solid oxide electrochemical cell technology by oxygen extraction from air. Cells with a 53×53 mm2 size consist of ca.10 μm CGO electrolyte sandwiched between composite electrodes made from either LSCF-CGO, or LSF-CGO were produced by a conventional tape casting method. To boost performance at low temperature, the electrodes were infiltrated with Pr-oxide. The electrochemical performance of the cells were characterized by iV and EIS at different temperatures with air used as feed stock to the cathode compartment and air, or oxygen used as sweep gas to the anode compartment. A voltage below 200mV is achieved to drive a current of 1A/cm2 through the cell, which can provide a purity of 90% of N2 at 650 °C. The cells were demonstrated to operate for producing a >98% pure N2 stream without degradation over a 1500h period at cell voltages below 255mV.
Original languageEnglish
JournalECS Transactions
Volume112
Issue number5
Pages (from-to)81-90
Number of pages10
ISSN1938-5862
DOIs
Publication statusPublished - 2023

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