Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 선양국 | - |
dc.date.accessioned | 2019-11-25T04:18:32Z | - |
dc.date.available | 2019-11-25T04:18:32Z | - |
dc.date.issued | 2017-05 | - |
dc.identifier.citation | ADVANCED ENERGY MATERIALS, v. 7, no. 18, Article no. 1602417 | en_US |
dc.identifier.issn | 1614-6832 | - |
dc.identifier.issn | 1614-6840 | - |
dc.identifier.uri | https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201602417 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/114049 | - |
dc.description.abstract | Although Li-O-2 batteries are promising next-generation energy storage systems with superior theoretical capacities, they have a serious limitation regarding the large overpotential upon charging that results from the low conductivity of the discharge product. Thus, various redox mediators (RMs) have been widely studied to reduce the overpotential in the charging process, which should promote the oxidation of Li2O2. However, RMs degrade the Li metal anode through a parasitic reaction between the RM and the Li metal, and a solution for this phenomenon is necessary. In this study, an effective method is proposed to prevent the migration of the RM toward the anode side of the lithium using a separator that is modified with a negatively charged polymer. When DMPZ (5,10-dihydro-5,10-dimethylphenazine) is used as an RM, it is found that the modified separator suppresses the migration of DMPZ toward the counter electrode of the Li metal anode. This is investigated by a visual redox couple diffusion test, a morphological investigation, and an X-ray diffraction study. This advanced separator effectively maximizes the catalytic activity of the redox mediator. Li-O-2 batteries using both a highly concentrated DMPZ and the modified separator exhibit improved performance and maintained 90% round-trip efficiency up to the 20th cycle. | en_US |
dc.description.sponsorship | This work was supported by the Human Resources Development program (No. 20154010200840) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) by a grant funded by the Korean government Ministry of Trade, Industry and Energy, and also by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) ( No. 2014R1A2A1A13050479). | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | WILEY-V C H VERLAG GMBH | en_US |
dc.subject | 5,10-dihydro-5,10-dimethylphenazine | en_US |
dc.subject | lithium oxygen batteries | en_US |
dc.subject | poly(3,4-ethylenedioxythiophene) polystyrene sulfonate | en_US |
dc.subject | redox mediators | en_US |
dc.subject | separators | en_US |
dc.title | An Advanced Separator for Li-O-2 Batteries: Maximizing the Effect of Redox Mediators | en_US |
dc.type | Article | en_US |
dc.relation.no | 18 | - |
dc.relation.volume | 7 | - |
dc.identifier.doi | 10.1002/aenm.201602417 | - |
dc.relation.page | 1-6 | - |
dc.relation.journal | ADVANCED ENERGY MATERIALS | - |
dc.contributor.googleauthor | Lee, Seon Hwa | - |
dc.contributor.googleauthor | Park, Jin-Bum | - |
dc.contributor.googleauthor | Lim, Hyung-Seok | - |
dc.contributor.googleauthor | Sun, Yang-Kook | - |
dc.relation.code | 2017010545 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ENERGY ENGINEERING | - |
dc.identifier.pid | yksun | - |
dc.identifier.researcherID | B-9157-2013 | - |
dc.identifier.orcid | http://orcid.org/0000-0002-0117-0170 | - |
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