Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 317, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121758
Keywords
Bifunctional oxygen electrode; Carbonized wood; Co nanoparticles; Chainmail catalyst
Funding
- Natural Science Foundation of Ningxia Province [2021AAC02016, 2021AAC03201]
- Leading Talents Program of Science and Technology Innovation in Ningxia Province [2020GKLRLX14]
- Iinnovation and Entrepreneurship Projects for Returnees of Ningxia Province
- Foundation of Academic Top-notch Talent Support Program of the North Minzu University [2019BGBZ08]
- Cooperative Scientific Research Project of Chunhui Plan of Ministry of Education of China [201900081]
- CAS Light of West China program [XAB2020YW11]
- Graduate Student Innovation Project of North Minzu University [YCX21150]
Ask authors/readers for more resources
In this study, a self-supported chainmail electrocatalyst was developed as an advanced air cathode for rechargeable Zn-air batteries. The electrocatalyst exhibited efficient oxygen reduction and oxygen evolution reactions, providing abundant reaction sites. The rechargeable battery assembled with the electrocatalyst demonstrated excellent stability and power density.
A self-supported chainmail electrocatalyst is developed by embedding graphitic carbon layer-encapsulated Co nanoparticles on N-doped carbonized wood (Co@NCW) as an advanced air cathode for rechargeable Zn-air batteries (ZABs). The NCW with open aligned microchannels facilitates O2 and electrolyte permeation and transportation, while the uniformly distributed graphitic carbon layer-encapsulated Co nanoparticles on NCW featuring fast electron transfer kinetics provide abundant triphase reaction sites for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The Co@NCW exhibits a half-wave potential of 0.89 V vs. reversible hydrogen electrode (RHE) for ORR outperforming the Pt/C (0.85 V vs. RHE) and an overpotential of 410 mV for the OER (10 mA cm-2) comparable to RuO2 (340 mV). A rechargeable ZAB assembled with Co@NCW presents a power density of 47.5 mW cm-2 and excellent stability at 5 mA cm-2 for 240 h. This work provides an effective strategy to fabricate a practically applicable oxygen electrode for ZABs.
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