Preparation and properties of an amorphous MnO2/CNTs-OH catalyst with high dispersion and durability for magnesium-air fuel cells

Zhixu, Zhang; Liu, Guohong; Sun, Cheng; Zhang, Tingwei; Wang, Suwen

doi:10.1016/j.cattod.2017.04.001

Cited by 52 publications

(17 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4,8,9 ORR and OER, as core electrochemical processes, determine the perform-ance of MeABs. 10,11 In this case, exploiting high-performance electrocatalysts has become an all-important opportunity for accelerating the ORR and OER, finally boosting the overall performance of MeABs.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In response to the challenges of environment pollution and energy crisis, the immediate imperative is to develop renewable clean energy instead of using traditional fossil fuels. − Among these energies, metal–air batteries (MeABs) possess lower cost, higher power density, larger energy density, and better environmental compatibility, attracting tremendous interest. − However, their widespread application is still limited by their limitations in the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). ,, ORR and OER, as core electrochemical processes, determine the performance of MeABs. , In this case, exploiting high-performance electrocatalysts has become an all-important opportunity for accelerating the ORR and OER, finally boosting the overall performance of MeABs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Controllable Hortensia-like MnO₂ Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries

Nie

Luo

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The exploitation of a high-activity and low-cost bifunctional catalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) as the cathode catalyst is a research priority in metal−air batteries. Herein, a novel bifunctional hybrid catalyst of hortensia-like MnO 2 synergized with carbon nanotubes (CNTs) (MnO 2 /CNTs) is controllably synthesized by reasonably designing the crystal structure and morphology as well as electronic arrangement. On the basis of these strategies, the hybrid accelerates the reaction kinetics and avoids the change of structures. As expected, MnO 2 /CNTs exhibit a remarkable ORR and OER activity [low ORR Tafel slope: 71 mV dec −1 , low OER Tafel slope: 67 mV dec −1 , and small potential difference (ΔE): 0.85 V] and a long-term stability, which should be attributed to its unique morphology, K + ions in the 2 × 2 tunnels, and synergistic effect between MnO 2 and CNTs. Notably, in zinc−air batteries (ZABs), aluminum−air batteries (AABs), and magnesium−air batteries (MABs), the composite shows high power density (ZABs: 243 mW cm −2 , AABs: 530 mW cm −2 , and MABs: 614 mW cm −2 ) and large specific capacities (793 mA h g Zn −1 , 918 mA h g Al −1, and 878 mA h g Mg −1 ). Importantly, the rechargeable ZABs reveal small charge−discharge voltage drop (0.81 V) and strong cycle durability (500 h), which are better than the noble-metal Pt/C + IrO 2 mixture catalyst (the voltage drop: 1.15 V at first and 2 V after 100 h). These superior performances together with the simple synthetic method of the hybrid reveal great promise in large-power energy storage and conversion equipment.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Controllable Hortensia-like MnO₂ Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries

Nie

Luo

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…One of the key targets for the noble metal-based catalysts is to reduce their loading, and meanwhile, maintain or even increase the overall activities relative to ORR and OER by incorporation of non-precious metal or metal-free composition. Most of the transition metal-based materials (e. g., oxides, [9][10][11] sulfides, [12][13][14][15] spinels, [16][17][18][19] macrocyclic compounds, [20][21][22] perovskites, [23][24][25] metal-NC catalysts, [26][27][28] ) and metal-free materials feature are earth abundant and cheap in price, which can be easily scalable. However, the relatively inferior catalytic activity severely hindered their practical application in energy related devices.…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Electrodes for Oxygen Electrocatalysis

Xuan

et al. 2022

ChemElectroChem

View full text Add to dashboard Cite

in oxygen reduction/evolution reactions, mainly including the 3D electrode design, the electrocatalysis in oxygen reduction, oxygen evolution and the bi-functional activity of the two reactions. Besides, metal-air batteries facilitated with 3D electrodes are also fully discussed, including the mechanisms based on the aqueous and organic electrolytes. At the end, the existing challenges and perspectives of 3D electrodes are proposed for further development of the metal-air batteries and auxiliary generative ideas for the renewable energy development.

show abstract

“…Yuan 23 focused on how to overcome the magnesium corrosion properties caused by the deposition of Mg(OH) 2 by exploring Mg alloys with various combinations of elements. Yue 27 and Zhang 28 used different types of catalysts on the cathode, whereas Vardar 29 and Muldoon 30 investigated the properties of electrolytes to improve the system performance. Therefore, this study aimed to provide a general review of MAFC development focusing on anode and electrolyte component, summarized the performance of MAFC using different kinds of anode materials, and discussed briefly the other existing anode modification approaches following the effect of physical properties, such as the temperature and pH level of the typical saline electrolyte, that is, NaCl, on corrosion behavior.…”

Section: Introductionmentioning

confidence: 99%

Critical review on development of magnesium alloy as anode inMg‐Airfuel cell and additives in electrolyte

et al. 2021

View full text Add to dashboard Cite

Summary This study aimed to provide a critical review of the magnesium‐air fuel cell (MAFC) system to provide readers with an overall comprehension of MAFC, which focuses on the modification of the magnesium anode and properties of saltwater as an electrolyte. Although MAFC is benign to the environment, it is well‐known for its challenging corrosion issue and by‐product deposition that affect its durability for commercialization and long‐term application. Since that MAFC is able to use seawater as electrolyte, it has great potential to be used as an alternative energy option for the marine sector. This journal will dissect the ability of MAFC to be used as a competitive alternative energy. Over the years, researchers have adopted several approaches, such as experimenting with different types of magnesium alloy and anode fabrication techniques, to tackle corrosion problems to alter the microstructure and mechanical properties of the anode in addition to applying a coating protection and using Mg‐based composite material. Furthermore, studies intriguingly and gradually focused on electrolyte formulation with different types of additives to address the debilitating precipitation issue and improve the discharge performance. Given the problems that arise in the system, currently, MAFC commercial products are only suitable as emergency back‐up power. In future work, an improved storage system for MAFC should be built to accommodate the precipitation products while maintaining the desired cell performance.

show abstract

Preparation and properties of an amorphous MnO2/CNTs-OH catalyst with high dispersion and durability for magnesium-air fuel cells

Cited by 52 publications

References 33 publications

Controllable Hortensia-like MnO₂ Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries

Controllable Hortensia-like MnO₂ Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries

Three‐Dimensional Electrodes for Oxygen Electrocatalysis

Critical review on development of magnesium alloy as anode inMg‐Airfuel cell and additives in electrolyte

Contact Info

Product

Resources

About

Preparation and properties of an amorphous MnO2/CNTs-OH catalyst with high dispersion and durability for magnesium-air fuel cells

Cited by 52 publications

References 33 publications

Controllable Hortensia-like MnO2 Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries

Controllable Hortensia-like MnO2 Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries

Three‐Dimensional Electrodes for Oxygen Electrocatalysis

Critical review on development of magnesium alloy as anode inMg‐Airfuel cell and additives in electrolyte

Contact Info

Product

Resources

About

Controllable Hortensia-like MnO₂ Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries

Controllable Hortensia-like MnO₂ Synergized with Carbon Nanotubes as an Efficient Electrocatalyst for Long-Term Metal–Air Batteries