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Kim, Guntae
GUNS Lab
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, metal-air batteries, ceramic membranes, PEMFC

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Hybrid-solid oxide electrolysis cell: A new strategy for efficient hydrogen production

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Title
Hybrid-solid oxide electrolysis cell: A new strategy for efficient hydrogen production
Author
Kim, JunyoungJun, AreumGwon, OhhunYoo, SeonyoungLiu, MeilinShin, JeeyoungLim, Tak-HyoungKim, Guntae
Keywords
Solid oxide electrolysis cell; Protonic oxide electrolysis cell; Hydrogen production; Water electrolysis
Issue Date
201802
Publisher
Elsevier BV
Citation
NANO ENERGY, v.44, no., pp.121 - 126
Abstract
Water electrolysis based on a solid oxide electrolysis cell (SOEC) has potential to be cost-effective, environmentally friendly, and highly efficient for hydrogen production. There are two types of SOECs, depending on electrolyte materials: oxygen ion conducting SOECs (oxygen-SOECs) and proton conducting SOECs (proton-SOECs). Here we report our new findings in exploring a SOEC based on a mixed-ion conductor that can transport both oxygen ion and proton at the same time, which is denoted as “Hybrid-SOEC”. When BaZr0.1Ce0.7Y0.1Yb0.1O3-δ was used as an electrolyte, the Hybrid SOEC shows the highest efficiency, demonstrating a current density of 3.16 A cm−2 at 1.3 V and 750 °C in 10% humidified hydrogen at hydrogen electrode and 10% humidified air at air electrode. Moreover, the Hybrid SOEC exhibits no observable degradation in performance for more than 60 h of continuous operation, implying a robust system for hydrogen production.
URI
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DOI
http://dx.doi.org/10.1016/j.nanoen.2017.11.074
ISSN
2211-2855
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