Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications
Lithium-air batteries exhibits high practical energy densities ranging from 1000 to 4000 Wh Kg ^−1 , rendering them appealing for applications in portable electronic devices and electric vehicles. Nevertheless, they grapple with challenges like low charge–discharge efficiency, limited stability over...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Nano Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2632-959X/acfe26 |
| _version_ | 1797634712335810560 |
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| author | R Prasada Rao B Ramasubramanian R Saritha S Ramakrishna |
| author_facet | R Prasada Rao B Ramasubramanian R Saritha S Ramakrishna |
| author_sort | R Prasada Rao |
| collection | DOAJ |
| description | Lithium-air batteries exhibits high practical energy densities ranging from 1000 to 4000 Wh Kg ^−1 , rendering them appealing for applications in portable electronic devices and electric vehicles. Nevertheless, they grapple with challenges like low charge–discharge efficiency, limited stability over multiple cycles, and electrode degradation stemming from undesirable side reactions, thus impeding their commercial market. In this study, ϵ-MnO _2 petal-like nanostructures were synthesized on Ni foam via simple, microwave-assisted synthesis approach. The resulting ϵ-MnO _2 /Ni electrode demonstrated storage capacities (1982 mAh g ^−1 discharge capacity at 200 mA g ^−1 ) alongside enhanced cyclability and stability over 100 cycles, independent of discharge depth. This electrochemical performance can be attributed to its 3D morphology, oxygen defects, and the absence of side reactions from carbon-based additives. Overall, ϵ-MnO _2 /Ni electrode catalysts hold potential for realizing cost-effective Li-O _2 based energy storage technologies. |
| first_indexed | 2024-03-11T12:11:25Z |
| format | Article |
| id | doaj.art-1ff6a06b5b4946fc8eca820983342776 |
| institution | Directory Open Access Journal |
| issn | 2632-959X |
| language | English |
| last_indexed | 2024-03-11T12:11:25Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nano Express |
| spelling | doaj.art-1ff6a06b5b4946fc8eca8209833427762023-11-07T11:39:11ZengIOP PublishingNano Express2632-959X2023-01-014404500410.1088/2632-959X/acfe26Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applicationsR Prasada Rao0https://orcid.org/0000-0002-4022-2340B Ramasubramanian1R Saritha2S Ramakrishna3https://orcid.org/0000-0001-8479-8686Centre for Nanofibers and Nanotechnology, Department of Mechanical Engineering, National University of Singapore , Singapore 117576, Singapore; Centre for Materials for Electronics Technology, MeitY, Pune, IndiaCentre for Nanofibers and Nanotechnology, Department of Mechanical Engineering, National University of Singapore , Singapore 117576, SingaporeCentre for Materials for Electronics Technology, MeitY, Pune, IndiaCentre for Nanofibers and Nanotechnology, Department of Mechanical Engineering, National University of Singapore , Singapore 117576, SingaporeLithium-air batteries exhibits high practical energy densities ranging from 1000 to 4000 Wh Kg ^−1 , rendering them appealing for applications in portable electronic devices and electric vehicles. Nevertheless, they grapple with challenges like low charge–discharge efficiency, limited stability over multiple cycles, and electrode degradation stemming from undesirable side reactions, thus impeding their commercial market. In this study, ϵ-MnO _2 petal-like nanostructures were synthesized on Ni foam via simple, microwave-assisted synthesis approach. The resulting ϵ-MnO _2 /Ni electrode demonstrated storage capacities (1982 mAh g ^−1 discharge capacity at 200 mA g ^−1 ) alongside enhanced cyclability and stability over 100 cycles, independent of discharge depth. This electrochemical performance can be attributed to its 3D morphology, oxygen defects, and the absence of side reactions from carbon-based additives. Overall, ϵ-MnO _2 /Ni electrode catalysts hold potential for realizing cost-effective Li-O _2 based energy storage technologies.https://doi.org/10.1088/2632-959X/acfe26diffusionvolume defectsMnO2/Ni electrodecathode catalystsbattery |
| spellingShingle | R Prasada Rao B Ramasubramanian R Saritha S Ramakrishna Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications Nano Express diffusion volume defects MnO2/Ni electrode cathode catalysts battery |
| title | Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications |
| title_full | Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications |
| title_fullStr | Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications |
| title_full_unstemmed | Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications |
| title_short | Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications |
| title_sort | microwave assisted synthesis for ϵ mno2 nanostructures on ni foam as for rechargeable li o2 battery applications |
| topic | diffusion volume defects MnO2/Ni electrode cathode catalysts battery |
| url | https://doi.org/10.1088/2632-959X/acfe26 |
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