Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 장진호 | - |
dc.date.accessioned | 2020-10-30T06:55:53Z | - |
dc.date.available | 2020-10-30T06:55:53Z | - |
dc.date.issued | 2019-11 | - |
dc.identifier.citation | ACS APPLIED MATERIALS & INTERFACES, v. 11, no. 46, Page. 43659-43670 | en_US |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.issn | 1944-8252 | - |
dc.identifier.uri | https://pubs.acs.org/doi/10.1021/acsami.9b13985 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/155119 | - |
dc.description.abstract | The inhibition of self-discharge in a redox-enhanced electrochemical capacitor (Redox-EC) is crucial for excellent energy retention. Heptyl viologen dibromide (HVBr2) was chosen as a strong candidate of a dual-redox species in Redox-EC due to its solid complexations during the charging process, at which HV2+ is electrochemically reduced to HV+center dot and form a solid complex, [HV+center dot center dot Br-], on an anode while Br- is electro-oxidized to Br-3(-) and renders [HV2+center dot 2Br(3)(-)] on a cathode. The solid complexes could not transfer across the separator, resulting in significant diminution of the self-discharge. In this Article, we present detailed electrochemical studies of formation of [HV2+center dot 2Br(3)(-)] and [HV+center dot center dot Br-], their redox features, and galvanic exchange reactions between the two types of dual-redox ionic solids on a Pt ultra-microelectrode (UME) in neutral (0.33 M Na2SO4) and acidic (1 M H2SO4) solutions. Most importantly, through voltammetric and particle-impact electrochemical analyses, we found that the redox and galvanic exchange reactions of the two dual-redox ionic solid complexes involve H+ transfer, which is the key process to limit the overall kinetics of the electrochemical reactions. We also rationalize the proton-accompanied galvanic exchange reaction based on computational simulation. | en_US |
dc.description.sponsorship | This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Bio & Medical Technology Development Program (2017M3A9G8084539) and the NRF funded by the Ministry of Education (2018R1D1A1B07044990). J.T.M. thanks the Korea Research Fellowship program funded by the Ministry of Science and ICT through the National Research Foundation of Korea (NRF-2015H1D3A1062502) for financial support. This work was also supported by the Korea Institute of Energy Research (Project B9-2434-02) and the research fund of Hanyang University (HY-201900000001679). | en_US |
dc.language.iso | en | en_US |
dc.publisher | AMER CHEMICAL SOC | en_US |
dc.subject | redox-enhanced electrochemical capacitor | en_US |
dc.subject | dual-redox ionic solid complexation | en_US |
dc.subject | proton-accompanied redox chemistry | en_US |
dc.subject | particle-impact electrochemistry | en_US |
dc.subject | galvanic exchange reaction | en_US |
dc.title | Viologen-Bromide Dual-Redox Ionic Solid Complexes: Understanding Their Electrochemical Formation and Proton-Accompanied Redox Chemistry | en_US |
dc.type | Article | en_US |
dc.relation.no | 46 | - |
dc.relation.volume | 11 | - |
dc.identifier.doi | 10.1021/acsami.9b13985 | - |
dc.relation.page | 43659-43670 | - |
dc.relation.journal | ACS APPLIED MATERIALS & INTERFACES | - |
dc.contributor.googleauthor | Lee, Semi | - |
dc.contributor.googleauthor | Muya, Jules Tshishimbi | - |
dc.contributor.googleauthor | Chung, Hoeil | - |
dc.contributor.googleauthor | Chang, Jinho | - |
dc.relation.code | 2019002549 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
dc.sector.department | DEPARTMENT OF CHEMISTRY | - |
dc.identifier.pid | jhcechem | - |
dc.identifier.researcherID | AAV-3344-2020 | - |
dc.identifier.orcid | https://orcid.org/0000-0002-5572-2364 | - |
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