期刊
NANO ENERGY
卷 44, 期 -, 页码 121-126出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2017.11.074
关键词
Solid oxide electrolysis cell; Protonic oxide electrolysis cell; Hydrogen production; Water electrolysis
类别
资金
- National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [NRF-2015R1A2A1A10055886, 2016R1A2B4008514]
- Korea CCS RD Center (KCRC) [2014M1A8A1049298]
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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