Bifunctional MOF-derived Co-N-doped carbon electrocatalysts for high-performance zinc-air batteries and MFCs. (1st August 2018)

• Record Type: Journal Article
• Authors: Li, Jie-Cheng; Wu, Xiao-Tong; Chen, Li-Jun; Li, Nan; Liu, Zhao-Qing
• Is Part Of: Energy. Volume 156(2018)
• Page Start: 95
• Page End: 102
• Publication Date: 2018-08-01
• Subjects: Metal-organic framework -- Co-N-C -- Oxygen reduction reaction -- Microbial fuel cell -- Zn-air battery; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2018.05.096
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: High cost and vulnerable stability of noble metal catalysts are the main barriers to develop the sustainable clean energy conversion and storage technology. In this work, a novel Co species/N-doped carbon (Co-N-C) derived from ZIF-67 has been designed and successfully prepared by a simple and feasible process. The ORR activities of the obtained Co-N-C with different contents of cobalt species were systematically investigated and clearly elucidated. Notably, the Co-N-C cathode exhibits a high onset-potential −0.12 V (vs. SCE) and long-tern stability in alkaline situation. Furthermore, the self-assembled Zn-air battery and microbial fuel cells (MFCs) devices coupled with Co-N-C cathode also achieve superior open-circuit potentials (Zn-air: 1.40 V, MFC: 0.45 V) and high power densities (Zn-air: 102.3 mW m −2, MFC: 399.7 ± 10 mW m −2 ). Graphical abstract: Image 1 Highlights: The MOFs-derived Co-N-C composite is successfully prepared by a facile method. The as-obtained catalysts exhibit high ORR performance. The cathode catalysts display superior practicability in Zinc-air battery and MFCs.