Hybrid-solid oxide electrolysis cell: A new strategy for efficient hydrogen production
- Authors
- Kim, Junyoung; Jun, Areum; Gwon, Ohhun; Yoo, Seonyoung; Liu, Meilin; Shin, Jeeyoung; Lim, Tak-Hyoung; Kim, Guntae
- Issue Date
- Feb-2018
- Publisher
- Elsevier BV
- Keywords
- Solid oxide electrolysis cell; Protonic oxide electrolysis cell; Hydrogen production; Water electrolysis
- Citation
- Nano Energy, v.44, pp 121 - 126
- Pages
- 6
- Journal Title
- Nano Energy
- Volume
- 44
- Start Page
- 121
- End Page
- 126
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/4689
- DOI
- 10.1016/j.nanoen.2017.11.074
- ISSN
- 2211-2855
2211-3282
- 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-delta 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 degrees 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.
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