Efficiently optimizing the oxygen catalytic properties of the birnessite type manganese dioxide for zinc-air batteries

Chen, Bin; Miao, He; Hu, Ruigan; Yin, Mingming; Wu, Xuyang; Sun, Shanshan; Wang, Qin; Li, Shihua; Yuan, Jinliang

doi:10.1016/j.jallcom.2020.157012

Cited by 32 publications

(12 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This enhanced ORR catalytic capability also makes Ag-MnO 2 -H-1.53 outstanding among the reported Mn-based catalysts (Table S2). ,− A peak around 0.5 V may be the redox peak of Mn-based catalysts. This atmosphere also can be seen from the reported non precious metal catalysts. ,,− Tafel plots (Figure S9c and Figure c) indicate that Ag-MnO 2 -H-1.53 (92 mV/dec) has a lower Tafel slope than Pt/C (99 mV/dec), implying faster catalytic ORR kinetics .…”

Section: Results and Discussionmentioning

confidence: 99%

Strongly Coupled MnO₂ Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

et al. 2021

View full text Add to dashboard Cite

Manganese dioxide (MnO2) represents a promising oxygen reduction reaction (ORR) electrocatalyst, but its catalytic activity is largely limited by the essentially low electronic conductivity and large geometric size. Herein, hierarchical ε-MnO2 nanosheets (MnO2-H) strongly coupled with silver nanoparticle spheres (Ag NPs) were developed. The introduced Ag NPs can not only enhance the electronic transfer but also tune the electronic structure of MnO2 and act as active sites for ORR. Owing to the large electrochemically active surface area, good mass/electronic transfer, and a strong coupled interface between MnO2-H and Ag NPs, the optimal Ag-MnO2-H-1.53 showed much higher catalytic activity than MnO2-H, Ag microparticles, and commercial Pt/C catalyst for ORR. Moreover, Ag-MnO2-H-1.53 displayed robust catalytic stability with negligible shift in the half-wave potential after 5000 cycles. As a cathode catalyst, a homemade zinc–air battery (ZAB) based on Ag-MnO2-H-1.53 showed a high open circuit voltage (1.52 V), maximum peak power density (120.2 mW/cm2), and specific capacity (646 mAh/g) superior to those of Pt/C-based ZAB (1.48 V, 82.3 mW/cm2, and 612 mAh/g), along with a long lifetime. This work highlights the significance of strong interface coupling between MnO2-H and Ag NPs for boosting the ORR electrocatalysis, which will inspire more work for the rational design of efficient carbon-free transition metal electrocatalysts for energy conversion.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Strongly Coupled MnO₂ Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The ORR/OER activities depend strongly on the crystallographic structure. Among the family of manganese oxides, α-MnO 2 has shown the greatest promise as electrocatalysts, which are mainly attributed to the large tunnel structure and high Mn 3+ content accompanied by enriched oxygen vacancies. , The following trend was found: β-MnO 2 < λ-MnO 2 < γ-MnO 2 < δ-MnO 2 ≈ α-MnO 2 for ORR activities and δ-MnO 2 < β-MnO 2 < amorphous MnO 2 < α-MnO 2 for OER activities. , According to Gu et al’s study, high crystallinity of α-MnO 2 can further enhance ORR activity, and this is more determinative than specific surface area . Many factors contribute to the superior electrocatalytic performance of α-MnO 2 .…”

Section: Green Energy Storage Systemsmentioning

confidence: 97%

“…101,102 The following trend was found: β-MnO 2 < λ-MnO 2 < γ-MnO 2 < δ-MnO 2 ≈ α-MnO 2 for ORR activities and δ-MnO 2 < β-MnO 2 < amorphous MnO 2 < α-MnO 2 for OER activities. 103,104 According to Gu et al's study, high crystallinity of α-MnO 2 can further enhance ORR activity, and this is more determinative than specific surface area. 105 Many factors contribute to the superior electrocatalytic performance of α-MnO 2 .…”

Section: Green Energy Storage Systemsmentioning

confidence: 99%

Green Electrochemical Energy Storage Devices Based on Sustainable Manganese Dioxides

et al. 2021

View full text Add to dashboard Cite

Green and sustainable electrochemical energy storage (EES) devices are critical for addressing the problem of limited energy resources and environmental pollution. A series of rechargeable batteries, metal−air cells, and supercapacitors have been widely studied because of their high energy densities and considerable cycle retention. Emerging as a promising electrode material for these devices, MnO 2 has drawn great attention due to its abundance, environmental sustainability, low cost, and high activity. This review provides a systematic overview of environmentally benign MnO 2 syntheses and representative applications in various electrochemical storage devices including metal-ion batteries, Zn−air batteries, and supercapacitors. A major emphasis is placed on ameliorating the environmental impact of MnO 2 materials via green syntheses and the eco-friendly and safe properties of advanced aqueous energy storage devices with MnO 2based electrodes. This review should provide insights into how intrinsic structure, modification of compositions or facets, and morphology influence the electrochemical performance of MnO 2 electrodes. Additionally, current challenges and future research opportunities are also discussed to facilitate further improvements in this field.

show abstract

“…25 Some metal atoms (Cu 2+ , Fe 3+ , K + , etc. ) and non-metallic atoms (C, N) have been incorporated into manganese oxides for the obtained defects; 26–29 however, there are few reports about defects obtained through p-doped manganese dioxides. Furthermore, many metal phosphide materials have been used as electrodes, which have good cycling performance and rate capability.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical manganese valence gradient MnO₂via phosphorus doping for cathode materials with improved stability

Zhao

et al. 2023

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Efficiently optimizing the oxygen catalytic properties of the birnessite type manganese dioxide for zinc-air batteries

Cited by 32 publications

References 53 publications

Strongly Coupled MnO₂ Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

Strongly Coupled MnO₂ Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

Green Electrochemical Energy Storage Devices Based on Sustainable Manganese Dioxides

Hierarchical manganese valence gradient MnO₂via phosphorus doping for cathode materials with improved stability

Contact Info

Product

Resources

About

Efficiently optimizing the oxygen catalytic properties of the birnessite type manganese dioxide for zinc-air batteries

Cited by 32 publications

References 53 publications

Strongly Coupled MnO2 Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

Strongly Coupled MnO2 Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

Green Electrochemical Energy Storage Devices Based on Sustainable Manganese Dioxides

Hierarchical manganese valence gradient MnO2via phosphorus doping for cathode materials with improved stability

Contact Info

Product

Resources

About

Strongly Coupled MnO₂ Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

Strongly Coupled MnO₂ Nanosheets/Silver Nanoparticles Hierarchical Spheres for Efficient Oxygen Reduction Reaction Electrocatalysis

Hierarchical manganese valence gradient MnO₂via phosphorus doping for cathode materials with improved stability