Journal
JOURNAL OF POWER SOURCES
Volume 493, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.229665
Keywords
B, N co-doping; Porous carbon nanosheets; Oxygen reduction reaction; Oxygen evolution reaction; Zn-air battery
Funding
- National Natural Science Foundation of China [21561019]
- program of Changjiang Scholars and Innovative Research Team in University [IRT_15R56]
- Science and Technology Program of Gansu Province [19JR2RA020]
Ask authors/readers for more resources
A carbonization-etching approach was used to prepare ultrathin B, N co-doped porous carbon nanosheets (BN-PCN) with hierarchically porous structure and large specific surface area, showing high catalytic activities for both ORR and OER. The BN-PCN exhibited superior stability compared to commercial Pt/C and demonstrated excellent power density and energy efficiency in a Zn-air battery setup. This study provides a promising avenue for designing heteroatom-doped porous carbon materials for clean energy conversion and storage applications.
Engineering highly efficient and robust porous carbon materials for the oxygen reduction and oxygen evolution reactions (ORR/OER) remains a great challenge for boosting the practical application of metal-air batteries. Herein, we report a carbonization-etching approach to achieve ultrathin B, N co-doped porous carbon nanosheets (BN-PCN) with hierarchically porous structure and large specific surface area (966.46 m(2) g(-1)) using intumescent flame retardant (IFR) system. Owing to its unique structural features, the BN-PCN delivers high electrocatalytic ORR activity with a comparable half-wave potential of 0.84 V and superior stability to those of commercial Pt/C. Moreover, the BN-PCN exhibits a smaller overpotential for OER in comparison with singly doped counterparts, suggesting that the structural properties of BN-PCN play important roles in imparting the electrocatalytic activities of ORR and OER. Furthermore, BN-PCN-driven Zn-air battery demonstrates excellent power density (193.6 mW cm(-2)) and high energy efficiency. This study offers a promising avenue for designing multiple heteroatom-doped porous carbon materials for clean energy conversion and storage applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available