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Effect of Applied Voltage on the Current Density of CO2 Electrolysis in High Temperature
| 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 | | YSZ | | 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 |
| URI: | http://hdl.handle.net/2115/75675 |
| 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)
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Submitter: 柏谷 悦章
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