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High-performance Li-CO2 batteries enabled by synergistic interaction of iron dopant-modulated catalysts and nitrogen-modified substrates.
- Source :
-
Journal of Alloys & Compounds . Mar2024, Vol. 976, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Efficient CO 2 electrodes require optimized catalytic activity and a delicate electrode structure. However, it is often insufficient to consider only a single factor when constructing a high-performance electrode. In this study, we elaborately prepare the freestanding Fe-doped CoP catalysts on N-doped carbon cloth (Fe-CoP@N-CC) substrates, which synergistically realizes electronic structure tuning of the catalysts and electrode structure modification. The experimental and theoretical calculations reveal that the electrode structure, consisting of fully covered nanowires on an N-CC skeleton, promotes mass transfer and accommodates products. The introduction of N atoms in Fe-CoP@N-CC leads to increased defects and strong Co–N–C bonds at the interface, enhancing interfacial electron transfer. Furthermore, Fe doping optimizes the electronic structure of Fe-CoP@N-CC. This synergistic enhancement facilitates the kinetics of both CO 2 reduction reaction (CO 2 RR) and CO 2 evolution reaction (CO 2 ER), resulting in the formation of large-size spherical morphologies following the solution pathway. The improved electrocatalytic performance of Fe-CoP@N-CC electrodes was demonstrated by their high discharge capacity of 4127 mAh g−1 and cycling stability of 446 h in Li–CO 2 batteries. These findings emphasize the significance of compatibility between electrode structure and catalytic activity in the design of CO 2 electrode. • Fe-doped CoP on N-doped carbon cloth (Fe-CoP@N-CC) substrates were fabricated. • Enlarged reaction active area and promoted mass transfer. • Strong Co–N–C bonds at the interface can facilitate interfacial electron transfer. • Enhanced CO 2 RR and CO 2 ER kinetics are realized. • Optimizing morphology and discharge product pathways. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 976
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 174758712
- Full Text :
- https://doi.org/10.1016/j.jallcom.2023.173146