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1D/2D hierarchical Co1-xFexO@N-doped carbon nanostructures for flexible zinc–air batteries
- Source :
- Electrochimica Acta. 363:137264
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Flexible zinc–air batteries (ZABs) are capable of powering the wearable electronic devices due to its high energy density and low cost. However, the sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) of the cathode materials greatly impede the practical application of ZABs. Here, we propose a synthetic strategy to prepare a unique 1D/2D hierarchical Co1-xFexO@NC nanostructures grown on flexible carbon cloth (Co1-xFexO@NC/CC), featuring enhanced OER and ORR reaction kinetics. The unique architecture is obtained from 1D Co1-xFex carbonate hydroxide hydrate nanowires grafted with 2D Co1-xFex-ZIF (ZIF = zeolitic imidazolate framework) nanosheets. For OER, the overpotential of Co0.68Fe0.32O@NC/CC is 260 mV. The half-wave potential of Co0.68Fe0.32O@NC/CC is 0.81 V for ORR. Moreover, the voltage gap is only 0.68 V. The assembled Co0.68Fe0.32O@NC/CC-based flexible ZABs exhibits a high open-circuit potential of 1.300 V, a high specific capacity of 673 mAh gZn−1, excellent cycling stability and outstanding flexibility, overwhelming the state-of-the-art Pt/C-based ZABs. The work will open up a new avenue for the development of the practical application of ZABs in wearable electronic devices.
- Subjects :
- Nanostructure
Materials science
General Chemical Engineering
Oxygen evolution
Nanowire
chemistry.chemical_element
Nanotechnology
02 engineering and technology
Overpotential
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Cathode
0104 chemical sciences
law.invention
chemistry.chemical_compound
chemistry
law
Imidazolate
Electrochemistry
Hydroxide
0210 nano-technology
Carbon
Subjects
Details
- ISSN :
- 00134686
- Volume :
- 363
- Database :
- OpenAIRE
- Journal :
- Electrochimica Acta
- Accession number :
- edsair.doi...........880d1e86db9fb63d0e5416efd22916ab