| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Highly effective thin carbide-layer coated bi-functional electrocatalysts for oxygen evolution and reduction in Zn–Air Batteries |
| 초록 |
To enhance the overall performance of Zn–air batteries, the system with a highly efficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial. Although Cu and Ni are known to be bi-functional electrocatalysts for ORR and OER, slow reactions due to the abnormally strong oxygen bond on the surface of the catalyst make it challenging to achieve ideal system efficiency. In this study, a thin carbide layer on Cu and Ni was fabricated to afford efficient catalytic active sites with a reasonable binding energy for facile electron transfer. The unique structure gave an enhanced catalytic surface and the protective thin carbide layer offered a suitable O binding energy and stability of Zn–air batteries. Density functional theory revealed a decrease in the overpotential of OER reactions. These results prove that carbide layers on dendritic metal surfaces can efficiently enhance the activity of ORR and OER bi-functional catalysts for Zn–air batteries. |
| 저자 |
김성욱, 장지현
|
| 소속 |
울산과학기술원 |
| 키워드 |
Metal carbide; Zn-Air; Battery; OER; ORR
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| E-Mail |
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