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Effect of Applied Voltage on the Current Density of CO2 Electrolysis in High Temperature

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ISIJ Int. 55(2)_ 392-398 (2015).pdf1.53 MBPDFView/Open
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Title: Effect of Applied Voltage on the Current Density of CO2 Electrolysis in High Temperature
Authors: Kashiwaya, Yoshiaki Browse this author →KAKEN DB
Shiomi, Yohei Browse this author
Nomura, Takahiro Browse this author
Hasegawa, Masakatsu Browse this author
Keywords: CO2 electrolysis
Pt electrode
high-performance cell
Issue Date: 15-Apr-2015
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 55
Issue: 2
Start Page: 392
End Page: 398
Publisher DOI: 10.2355/isijinternational.55.392
Abstract: Reductions in CO2 emission can be achieved directly through CO2 capture and storage (CCS), a method that is particularly effective when used with large CO2 emitters such as electrical power plants and iron and steel mills. Solid-oxide electrolysis presents an alternative means of reducing CO2 that can use some of the CO2 captured by CCS as a source of electrolysis. In addition, unused heat generated by steelmaking and through renewable sources (e.g., solar and wind) can be utilized for high-temperature electrolysis. This study investigated the effect of applying a high voltage of between 2.5 and 4.0 V to common electrolytic materials (YSZ and Pt), and found that although the initial current density of a new cell is very low, it increases drastically upon application of a high voltage. The results of FE-SEM observation revealed that the interface between the YSZ and Pt electrode moves into the YSZ by about 70 μm, and consists of a nano- and micro-porous structure that reduces the resistivity and gas diffusivity.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柏谷 悦章

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