Enhanced sodium ion storage in MnO<sub>2</sub> through asymmetric orbital hybridization induced by spin-paired ion doping

Wang, Jinrui; Liu, Xia; Hou, Zishan; Wang, Shiyu; Yao, Shuyun; Gao, Xueying; Liu, Yuanming; Nie, Kaiqi; Xie, Jiangzhou; Yang, Zhiyu; Yan, Yi-Ming

doi:10.1039/d3ta06776a

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta06776a

|View full text |Cite

Enhanced sodium ion storage in MnO₂ through asymmetric orbital hybridization induced by spin-paired ion doping

Jinrui Wang,

Xia Liu,

Zishan Hou

et al.

Abstract: Manganese dioxide (MnO2), due to its considerable theoretical capacitance, is emerging as a promising contender in the search for effective electrode materials. However, its practical application is hampered by inherently...

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2024

Publication Types

Select...

Article5

Relationship

Self Cite0

Independent5

Authors

Journals

Cited by 5 publications

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Kim,

Sohn

et al. 2024

Advanced Energy Materials

View full text Add to dashboard Cite

Achieving a high storage capability while maintaining good rate performance using symmetric microsupercapacitors (MSCs) remains challenging. Herein, a 3D symmetric MSC based on interdigitated 3D bicontinuous pseudocapacitive electrodes is proposed to simultaneously attain ultrahigh energy density and ultrafast response. The 3D electrodes comprise electrolytically active MnO2 layers conformally coated onto a 3D periodic porous Ni current collector. In this architecture, the low conductivity of MnO2 can be compensated by efficient charge transport and facile charge transfer without compromising its high capacitance. The 3D MSC with a 1‐V window exhibits an ultrahigh volumetric energy density of 15.8 mWh cm−3 with a high power density of 4.95 W cm−3, outperforming all previously reported MnO2‐based symmetric MSCs. Benefitting from its ultrafast response, the 3D MSC exhibits superiority in terms of the phase angle (−66°), areal capacitance (1400 µF cm−2), and time constant (0.6 ms) at an alternating‐current (AC) frequency of 120 Hz. By using the 3D MSC as a line‐filtering capacitor in a real circuit, the AC signal is effectively smoothed with small residual ripples (≈1.35 mV). Additionally, the device achieves excellent performance in an all‐solid‐state form.

show abstract

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Kim,

Sohn

et al. 2024

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Qiu,

Wu,

Liu

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

γ‐Fe2O3 with the intrinsic cation vacancies is an ideal substrate for heteroatom doping into the highly active octahedral sites in spinel oxide catalysts. However, it is still a challenge to confirm the vacancy location of γ‐Fe2O3 through experiments and obtain enhanced catalytic performance by preferential occupation of octahedral sites for heteroatom doping. Here, a Mn‐doped γ‐Fe2O3 incorporated with carbon nanotubes catalyst was developed to successfully achieve preferential doping into highly active octahedral sites by employing γ‐Fe2O3 as the precursor. Further, the vacancy in γ‐Fe2O3 was only located on octahedral sites rather than tetrahedral ones, which was first proved by direct experimental evidence through the clarification doping sites of Mn. Notably, the catalyst shows outstanding activity towards oxygen reduction reaction with the half‐wave potential of 0.82 V and 0.64 V vs. reversible hydrogen electrode in alkaline and neutral electrolytes, respectively, as well as the maximum power density of 179 mWcm−2 and 403 mWcm−2 for Mg‐air batteries and Al‐air batteries, respectively. It could be attributed to the synergistic effect of the doping Mn on octahedral sites and the substrate γ‐Fe2O3 along with the modification of the adsorption/desorption properties for ORR oxygen‐containing intermediates as well as the optimization of the reaction energy barriers.

show abstract

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Qiu,

Wu,

Liu

et al. 2024

Angew Chem Int Ed

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Enhanced sodium ion storage in MnO₂ through asymmetric orbital hybridization induced by spin-paired ion doping

Abstract: Manganese dioxide (MnO2), due to its considerable theoretical capacitance, is emerging as a promising contender in the search for effective electrode materials. However, its practical application is hampered by inherently...

Cited by 5 publications

References 74 publications

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Contact Info

Product

Resources

About

Enhanced sodium ion storage in MnO2 through asymmetric orbital hybridization induced by spin-paired ion doping

Abstract: Manganese dioxide (MnO2), due to its considerable theoretical capacitance, is emerging as a promising contender in the search for effective electrode materials. However, its practical application is hampered by inherently...

Cited by 5 publications

References 74 publications

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe2O3 for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe2O3 for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Contact Info

Product

Resources

About

Enhanced sodium ion storage in MnO₂ through asymmetric orbital hybridization induced by spin-paired ion doping

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries