Synthesis of Co3o4/Nico2o4 Double-Shelled Nanocages with Enhanced Capacitive and Oxygen Evolution Reaction Properties in Battery-Supercapacitor Hybrid Devices

Liu, Jiaqi; Meng, Yanan; Yu, Deyang; Guo, Chuanbin; Liu, Liangyu; Liu, Xiaoyang

doi:10.2139/ssrn.4265572

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“…A bifunctional electrocatalyst, which is a mixture of Co3O4-NiCo2O4, has been used in various developments. It has been successfully applied as a cathode electrocatalyst for Zn-air batteries and shows superior activity and excellent stability [27,28]. Compared with pure Co3O4, the mixture of Co3O4-NiCo2O4 shows excellent ORR and OER performance [29].…”

Section: Figure 1 Schematic Illustration Of Rechargeable Metal-air Sy...mentioning

confidence: 99%

Investigation of Ni- and Co-Based Bifunctional Electrocatalysts for Carbon-Free Air Electrodes Designed for Zinc-Air Batteries

et al. 2023

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Ni- and Co-oxide materials have promising electrocatalytic properties towards the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR), and attract with low cost, availability, and environmental friendliness. The stability of these materials in alkaline media has made them the most studied candidates for practical applications such as a gas diffusion electrode (GDE) for rechargeable metal-air batteries. In this work, we propose a novel concept for a carbon-free gas GDE design. A mixture of catalyst (Co3O4, NiCo2O4) and polytetrafluoroethylene was hot pressed onto a stainless-steel mesh as the current collector. To enhance the electrical conductivity and, thus, increase ORR performances, up to 70 wt.% Ni powder was included. The GDEs produced in this way were examined in a half-cell configuration with a 6 M KOH electrolyte, stainless steel counter electrode, and hydrogen reference electrode at room temperature. Electrochemical tests were performed and coupled with microstructural observations to evaluate the properties of the present oxygen electrodes in terms of their bifunctionality and stability enhancement. The electrochemical behavior of the new types of gas-diffusion electrodes, Ni/Co3O4 and Ni/NiCo2O4, shows acceptable overpotentials for OER and ORR. Better mechanical and chemical stability of electrodes consisting of Ni/NiCo2O4 (70:30 wt.%) was registered. Doi: 10.28991/ESJ-2023-07-03-023 Full Text: PDF

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Section: Figure 1 Schematic Illustration Of Rechargeable Metal-air Sy...mentioning

confidence: 99%

Investigation of Ni- and Co-Based Bifunctional Electrocatalysts for Carbon-Free Air Electrodes Designed for Zinc-Air Batteries

et al. 2023

View full text Add to dashboard Cite

show abstract

Synthesis of Co3o4/Nico2o4 Double-Shelled Nanocages with Enhanced Capacitive and Oxygen Evolution Reaction Properties in Battery-Supercapacitor Hybrid Devices

Cited by 1 publication

References 0 publications

Investigation of Ni- and Co-Based Bifunctional Electrocatalysts for Carbon-Free Air Electrodes Designed for Zinc-Air Batteries

Investigation of Ni- and Co-Based Bifunctional Electrocatalysts for Carbon-Free Air Electrodes Designed for Zinc-Air Batteries

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