Please use this identifier to cite or link to this item: https://doi.org/10.1038/nenergy.2017.74
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dc.titleReversible multi-electron redox chemistry of pi-conjugated N-containing heteroaromatic molecule-based organic cathodes
dc.contributor.authorPeng, Chengxin
dc.contributor.authorNing, Guo-Hong
dc.contributor.authorSu, Jie
dc.contributor.authorZhong, Guiming
dc.contributor.authorTang, Wei
dc.contributor.authorTian, Bingbing
dc.contributor.authorSu, Chenliang
dc.contributor.authorYu, Dingyi
dc.contributor.authorZu, Lianhai
dc.contributor.authorYang, Jinhu
dc.contributor.authorNg, Man-Fai
dc.contributor.authorHu, Yong-Sheng
dc.contributor.authorYang, Yong
dc.contributor.authorArmand, Michel
dc.contributor.authorLoh, Kian Ping
dc.date.accessioned2020-08-14T07:30:11Z
dc.date.available2020-08-14T07:30:11Z
dc.date.issued2017-07-01
dc.identifier.citationPeng, Chengxin, Ning, Guo-Hong, Su, Jie, Zhong, Guiming, Tang, Wei, Tian, Bingbing, Su, Chenliang, Yu, Dingyi, Zu, Lianhai, Yang, Jinhu, Ng, Man-Fai, Hu, Yong-Sheng, Yang, Yong, Armand, Michel, Loh, Kian Ping (2017-07-01). Reversible multi-electron redox chemistry of pi-conjugated N-containing heteroaromatic molecule-based organic cathodes. NATURE ENERGY 2 (7). ScholarBank@NUS Repository. https://doi.org/10.1038/nenergy.2017.74
dc.identifier.issn20587546
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/172634
dc.description.abstract© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Even though organic molecules with well-designed functional groups can be programmed to have high electron density per unit mass, their poor electrical conductivity and low cycle stability limit their applications in batteries. Here we report a facile synthesis of π-conjugated quinoxaline-based heteroaromatic molecules (3Q) by condensation of cyclic carbonyl molecules with o-phenylenediamine. 3Q features a number of electron-deficient pyrazine sites, where multiple redox reactions take place. When hybridized with graphene and coupled with an ether-based electrolyte, an organic cathode based on 3Q molecules displays a discharge capacity of 395 mAh g-1 at 400 mA g-1 (1C) in the voltage range of 1.2-3.9 V and a nearly 70% capacity retention after 10,000 cycles at 8 A g-1. It also exhibits a capacity of 222 mAh g-1 at 20C, which corresponds to 60% of the initial specific capacity. Our results offer evidence that heteroaromatic molecules with multiple redox sites are promising in developing high-energy-density, long-cycle-life organic rechargeable batteries.
dc.language.isoen
dc.publisherNATURE PUBLISHING GROUP
dc.sourceElements
dc.subjectScience & Technology
dc.subjectTechnology
dc.subjectEnergy & Fuels
dc.subjectMaterials Science, Multidisciplinary
dc.subjectMaterials Science
dc.subjectRAY PHOTOELECTRON-SPECTROSCOPY
dc.subjectLITHIUM-ION BATTERIES
dc.subjectHIGH-ENERGY DENSITY
dc.subjectORBITAL METHODS
dc.subjectLOW-COST
dc.subjectBASIS-SETS
dc.subjectPERFORMANCE
dc.subjectSURFACE
dc.subjectELECTROLYTE
dc.subjectSULFUR
dc.typeArticle
dc.date.updated2020-05-31T13:59:40Z
dc.contributor.departmentDEPT OF CHEMISTRY
dc.description.doi10.1038/nenergy.2017.74
dc.description.sourcetitleNATURE ENERGY
dc.description.volume2
dc.description.issue7
dc.published.statePublished
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