Filter paper derived three-dimensional mesoporous carbon with Co3O4 loaded on surface: An excellent binder-free air-cathode for rechargeable Zinc-air battery

An, Kaili; Zheng, Yang; Xu, Xinxin; Wang, Yi

doi:10.1016/j.jssc.2018.12.021

Cited by 8 publications

(5 citation statements)

References 46 publications

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“…The operation of a fuel cell with a flowing electrolyte has many benefits such as: (i) a flowing 165 electrolyte can exclude away discharge products in the fuel cells without affecting the electrochemical 166 reactions, and (ii) it may also reduce the heat and wash away the gas bubbles generated by the 167 reactions and will manage the battery thermal system [14]. Power performance of the ZAFCs with 168 respect to all the above-mentioned parameters were significantly analyzed by the polarization curves.…”

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confidence: 99%

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

et al. 2019

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Zinc (Zn)-air fuel cells (ZAFC) are a widely-acknowledged type of metal air fuel cells, but optimization of several operational parameters and components will facilitate enhanced power performance. This research study has been focused on the investigation of ZAFC Zn particle fuel with flowing potassium hydroxide (KOH) electrolyte. Parameters like optimum electrolyte concentration, temperature, and flow velocity were optimized. Moreover, ZAFC components like anode current collector and cathode conductor material were varied and the appropriate materials were designated. Power performance was analyzed in terms of open circuit voltage (OCV), power, and current density production and were used to justify the results of the study. The flow rate of the electrolyte was determined as 150 mL/min in the self-designed configuration. KOH electrolyte of 40 wt% concentration, at a temperature of 55 to 65 ℃, and with a flow velocity of 0.12 m/s was considered to be beneficial for the ZAFCs operated in this study. Nickel mesh with a surface area of 400 cm2 was chosen as anode current collector and copper plate was considered as cathode conductor material in the fuel cells designed and operated in this study. The power production of this study was better compared to some previously published works. Thus, effective enhancement and upgrading process of the ZAFCs will definitely provide great opportunities for their applications in the future.

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confidence: 99%

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

et al. 2019

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“…The performance of CMO-U@CC in the rechargeable ZAB was compared with those of recently reported oxide-based rechargeable ZABs (Figure 8h). [71][72][73][74][75][76][77][79][80][81][82]106,107] Notably, this activity was also superior to those of recently reported oxide-based electrocatalysts for EWS and rechargeable ZAB (Tables S4 and S5, Supporting Information).…”

Section: Aqueous Rechargeable Zinc-air Battery-driven Electrochemical Water Splittingmentioning

confidence: 90%

“…Figure 3f shows the comparison between the ORR activity of the CMO-U@CC electrode and those of reported oxide-based electrocatalysts in an alkaline solution. [20,45,[66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82] The post ORR high-resolution XPS results (Figure S5a-c, Supporting Information) indicate the compositional changes on the surface of electrocatalyst after the ORR electrocatalytic activity. The deconvoluted Co 2p and Mn 2p XPS spectra reveal a slight increase in Co 3+ , Mn 3+ , Mn 4+ , and surface oxygen peaks indicating the oxidation of surface metal sites during ORR.…”

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confidence: 99%

In Situ Grown CoMn₂O₄ 3D‐Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc–Air Battery Powered Water Splitting Systems

Janani

Surendran

Choi

et al. 2021

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oxygen evolution reaction and oxygen reduction reaction (OER and ORR) play important roles in rechargeable zinc-air battery (ZAB), whereas OER and hydrogen evolution reaction (HER) are the core reactions in EWS. [4,5] These electrochemical reactions exhibit sluggish kinetics because they require multistep protoncoupled electron transfers, which increase the overpotentials of the systems, thus causing the losses of considerable energy and long-term electrocatalytic activity. [6][7][8][9] Multifunctional electrocatalysts that efficiently catalyzes diverse electrochemical reactions (OER, HER, and ORR) have recently attracted considerable attention. Multifunctional electrocatalysts can reduce the manufacturing cost of the specific electrocatalysts for various electrochemical systems. The state-of-the-art catalysts such as Pt-based electrocatalysts (ORR and HER), IrO 2 and RuO 2 (OER) could not meet the characteristics of ideal multifunctional electrocatalysts because of high cost, non-abundancy, and non-multifunctional electrocatalytic activity. [10] Moreover, there are limited reports on the strategies for synthesizing multi functional electrocatalysts with intense activity, stability, and selectivity; [11][12][13] and this has necessitated the development of inexpensive, abundant, efficient, and stable multifunctional electrocatalysts to substitute the noble metal-based electrocatalysts.Transition metal oxides (TMOs) have been recently identified as the most promising alternatives to noble metal-based electrocatalysts because of their natural abundance, environmental sustainability, and superior thermal and chemical stabilities under different operating conditions. [14][15][16][17][18] A few promising TMOs exhibit spinel structures, especially cobalt oxide, because Co in its d 7 state with unpaired electrons enhances the activation and polarization of media and the presence of different valences encourage electron transfer during ORR, OER, and HER. Similarly, manganese oxides are inexpensive and abundant materials that promote natural OER in plants, as well as the desired four-electron pathway toward ORR; however, the poor electronic conductivity of manganese oxides limits their electrocatalytic activity. To overcome these limitations, manganese oxide can be combined with cobalt as a co-metal in the spinel structure. Further, increasing the surface area and amounts of Mn 3+ and Mn 2+ can considerably enhance the The integration of energy conversion and storage systems such as electrochemical water splitting (EWS) and rechargeable zinc-air battery (ZAB) is on the vision to provide a sustainable future with green energy resources. Herein, a unique strategy for decorating 3D tetragonal CoMn 2 O 4 on carbon cloth (CMO-U@CC) via a facile one-pot in situ hydrothermal process, is reported. The highly exposed morphology of 3D tetragons enhances the electrocatalytic activity of CMO-U@CC. This is the first demonstration of such a bifunctional activity of CMO-U@CC in an EWS system; it achieves a nominal cell voltage of 1.610 ...

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“…Zn is abundant on earth, and the reaction products of ZAFC do not cause any pollution. Several technological breakthroughs have been achieved in anode and cathode fabrication . In recent times, ZAFC discharge performance has been further improved rapidly .…”

Section: Introductionmentioning

confidence: 99%

“…Several technological breakthroughs have been achieved in anode 7-10 and cathode fabrication. [11][12][13][14] In recent times, ZAFC discharge performance has been further improved rapidly. 15,16 Furthermore, unlike other rechargeable batteries, ZAFCs can be classified as fuel cells and are used for not only energy storage but also power generation in some fields.…”

Section: Introductionmentioning

confidence: 99%

The optimization of electrolyte flow management to increase the performance of Zn–air fuel cells

2020

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Summary Zinc (Zn)–air fuel cells (ZAFCs) are one of the potential alternatives to fossil fuels. Because a flowing electrolyte can directly affect cell performance, we focused on the electrolyte management of a ZAFC. The ZAFC galvanostatic discharge was examined to determine its performance. The electrolyte concentration, temperature, and circulation rate were used as the operating parameters for discharge tests, and the relationship between electrolyte and cell performance was discussed based on the experimental results. To elucidate the effect of electrolyte‐flow, the computation fluid dynamic simulations have been first performed. The results revealed that the cell performance associating the remnant oxygen in the electrolyte channel

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Filter paper derived three-dimensional mesoporous carbon with Co3O4 loaded on surface: An excellent binder-free air-cathode for rechargeable Zinc-air battery

Cited by 8 publications

References 46 publications

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

In Situ Grown CoMn₂O₄ 3D‐Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc–Air Battery Powered Water Splitting Systems

The optimization of electrolyte flow management to increase the performance of Zn–air fuel cells

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Filter paper derived three-dimensional mesoporous carbon with Co3O4 loaded on surface: An excellent binder-free air-cathode for rechargeable Zinc-air battery

Cited by 8 publications

References 46 publications

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

Optimization of the Electrolyte Parameters and Components in Zinc Particle Fuel Cells

In Situ Grown CoMn2O4 3D‐Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc–Air Battery Powered Water Splitting Systems

The optimization of electrolyte flow management to increase the performance of Zn–air fuel cells

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In Situ Grown CoMn₂O₄ 3D‐Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc–Air Battery Powered Water Splitting Systems