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Improved Electrocatalytic Activity of Three-Dimensional Open-Structured Co3O4@MnO2 Bifunctional Catalysts of Li-O2 Batteries by Inducing the Oriented Growth of Li2O2
- Source :
- ACS Sustainable Chemistry & Engineering. 9:5334-5344
- Publication Year :
- 2021
- Publisher :
- American Chemical Society (ACS), 2021.
-
Abstract
- Rational structure and morphology design of catalytic cathode materials is the key to realize excellent performances of lithium-oxygen batteries (LOBs). Herein, a three-dimensional (3D) open-structured Co₃O₄@MnO₂ heteromatrix has been designed through a facile two-step hydrothermal method. Unexpectedly, when it serves as oxygen reduction reaction/oxygen evolution reaction bifunctional catalytic cathodes for lithium-oxygen cells, the 3D open-structured Co₃O₄@MnO₂ heteromatrix-catalyzed LOBs exhibit outstanding electrochemical performances (a high specific capacity of 12,980 mA h g–¹ during the initial discharge and long cycle life of 331, 197, and 14 times with specific capacities fixed at 500, 1000, and even 3000 mA h g–¹, respectively), obviously superior to reported batteries based on low-dimensional and closed-ended catalysts. We find that the enhanced electrochemical performances are ascribed to the bifunctional catalyst and the 3D open structure of the Co₃O₄@MnO₂ heteromatrix, which can guide the homogeneous and fluffy deposition of discharge products Li₂O₂, demonstrating a promising application in both LOBs and flexible/wearable Li-air batteries.
- Subjects :
- Long cycle
Materials science
Renewable Energy, Sustainability and the Environment
General Chemical Engineering
Oxygen evolution
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Hydrothermal circulation
Cathode
0104 chemical sciences
law.invention
Catalysis
Bifunctional catalyst
chemistry.chemical_compound
chemistry
Chemical engineering
law
Environmental Chemistry
0210 nano-technology
Bifunctional
Subjects
Details
- ISSN :
- 21680485
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- ACS Sustainable Chemistry & Engineering
- Accession number :
- edsair.doi...........bc2014bcd45f1ac41536e467e1c3f676