35 0

Long-Life Rechargeable Zn Air Battery Based on Binary Metal Carbide Armored by Nitrogen-Doped Carbon

Title
Long-Life Rechargeable Zn Air Battery Based on Binary Metal Carbide Armored by Nitrogen-Doped Carbon
Author
이정호
Keywords
metal carbide; metal organic framework (MOF); rechargeable Zn air battery; bifunctional electrocatalyst; armored electrocatalyst
Issue Date
2019-01
Publisher
American Chemical Society
Citation
ACS Applied Energy Materials, v. 2, No. 3, Page. 1747-1755
Abstract
Developing low-cost and high-performance bifunctional oxygen electrocatalysts is essential for commercial realization of regenerative fuel cells and rechargeable metal air batteries. Iron carbide (Fe3C) is an ideal electrocatalyst candidate; however, its poor oxygen evolution reaction (OER) activity and stability make it serve only as a unifunctional oxygen reduction reaction (ORR) electrocatalyst. Here, we report a robust bifunctional electrocatalyst consisting of manganese–iron binary carbide (MnxFe3–xC) nanoparticles armored by nitrogen-doped graphitic carbon (MnxFe3–xC/NC). Synthesis involved facile pyrolysis of a trimetallic (Fe, Mn, Zn) zeolitic imidazolate framework. Incorporation of Mn modulated the electronic properties of Fe3C and the surrounding carbon, enhancing ORR and OER activities. MnxFe3–xC, well-armored by carbon layers, displayed high resistance to oxidation and corrosion. The assembled Zn-air battery (ZAB) exhibited a large peak power density (160 mW cm–2 at 250 mA cm–2) with an energy density of up to 762 mWh gZn–1, high open-circuit voltage of 1.5 V, and impressive long-term stability over 1000 cycles, indicating that MnxFe3–xC is one of the most stable earth abundant (cobalt-free) bifunctional electrocatalysts for rechargeable ZABs currently available.
URI
https://pubs.acs.org/doi/abs/10.1021/acsaem.8b01865https://repository.hanyang.ac.kr/handle/20.500.11754/112158
ISSN
2574-0962
DOI
10.1021/acsaem.8b01865
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE