Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 선양국 | - |
dc.date.accessioned | 2020-03-25T02:46:26Z | - |
dc.date.available | 2020-03-25T02:46:26Z | - |
dc.date.issued | 2019-03 | - |
dc.identifier.citation | NATURE COMMUNICATIONS, v. 10, 1380 | en_US |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.uri | https://www.nature.com/articles/s41467-019-09399-0 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/139442 | - |
dc.description.abstract | Non-aqueous lithium-oxygen batteries cycle by forming lithium peroxide during discharge and oxidizing it during recharge. The significant problem of oxidizing the solid insulating lithium peroxide can greatly be facilitated by incorporating redox mediators that shuttle electron-holes between the porous substrate and lithium peroxide. Redox mediator stability is thus key for energy efficiency, reversibility, and cycle life. However, the gradual deactivation of redox mediators during repeated cycling has not conclusively been explained. Here, we show that organic redox mediators are predominantly decomposed by singlet oxygen that forms during cycling. Their reaction with superoxide, previously assumed to mainly trigger their degradation, peroxide, and dioxygen, is orders of magnitude slower in comparison. The reduced form of the mediator is markedly more reactive towards singlet oxygen than the oxidized form, from which we derive reaction mechanisms supported by density functional theory calculations. Redox mediators must thus be designed for stability against singlet oxygen. | en_US |
dc.description.sponsorship | This work was supported by a Human Resources Development program (No. 20184010201720) of a Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant, funded by the Ministry of Trade, Industry and Energy of the Korean government, and supported by National Research Foundation of Korea (NRF) grant funded by the Korea government Ministry of Education and Science Technology (MEST) (NRF-2018R1A2B3008794). S.A.F. is indebted to the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement no. 636069) and the Austrian Federal Ministry of Science, Research and Economy and the Austrian Research Promotion Agency (grant No. 845364) and initial funding from the Austrian Science Fund (FWF, Project No. P26870-N19). The work by L.A.C. and P.C.R. was supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office. | en_US |
dc.language.iso | en | en_US |
dc.publisher | NATURE PUBLISHING GROUP | en_US |
dc.subject | LI-O-2 BATTERIES | en_US |
dc.subject | ENE REACTIONS | en_US |
dc.subject | ELECTROLYTE | en_US |
dc.subject | SUPEROXIDE | en_US |
dc.subject | STABILITY | en_US |
dc.subject | CHARGE | en_US |
dc.subject | LI2O2 | en_US |
dc.subject | INTERMEDIATE | en_US |
dc.subject | DEGRADATION | en_US |
dc.subject | CHEMISTRY | en_US |
dc.title | Deactivation of redox mediators in lithium-oxygen batteries by singlet oxygen | en_US |
dc.type | Article | en_US |
dc.relation.volume | 10 | - |
dc.identifier.doi | 10.1038/s41467-019-09399-0 | - |
dc.relation.page | 1-8 | - |
dc.relation.journal | NATURE COMMUNICATIONS | - |
dc.contributor.googleauthor | Kwak, Won-Jin | - |
dc.contributor.googleauthor | Kim, Hun | - |
dc.contributor.googleauthor | Petit, Yann K. | - |
dc.contributor.googleauthor | Leypold, Christian | - |
dc.contributor.googleauthor | Nguyen, Trung Thien | - |
dc.contributor.googleauthor | Mahne, Nika | - |
dc.contributor.googleauthor | Redfern, Paul | - |
dc.contributor.googleauthor | Curtiss, Larry A. | - |
dc.contributor.googleauthor | Jung, Hun-Gi | - |
dc.contributor.googleauthor | Sun, Yang-Kook | - |
dc.relation.code | 2019042920 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ENERGY ENGINEERING | - |
dc.identifier.pid | yksun | - |
dc.identifier.orcid | https://orcid.org/0000-0002-0117-0170 | - |
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