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dc.contributor.authorXiong, Qi
dc.contributor.authorHuang, Gang
dc.contributor.authorZhang, Xin Bo
dc.date.accessioned2020-09-07T13:02:22Z
dc.date.available2020-09-07T13:02:22Z
dc.date.issued2020-08-26
dc.date.submitted2020-06-30
dc.identifier.citationZhang, X. (2020). Trifunctional soluble redox mediator enabled high-capacity and stable Li-O2 batteries. Angewandte Chemie International Edition. doi:10.1002/anie.202009064
dc.identifier.issn1521-3773
dc.identifier.issn1433-7851
dc.identifier.doi10.1002/anie.202009064
dc.identifier.urihttp://hdl.handle.net/10754/664992
dc.description.abstractLi-O2 batteries with ultrahigh theoretical energy densities usually suffer from low practical discharge capacities and inferior cycling stability owing to the cathode passivation caused by insulating discharge products and by-products. Here, a trifunctional ether-based redox mediator, 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB), is introduced into the electrolyte to capture reactive O2− and alleviate the rigorous oxidative environment of Li-O2 batteries. Thanks to the strong solvation effect of DBDMB towards Li+ and O2−, it not only reduces the formation of by-products (a high Li2O2 yield of 96.6 %), but also promotes the solution growth of large-sized Li2O2 particles, avoiding the passivation of cathode as well as enabling a large discharge capacity. Moreover, DBDMB makes the oxidization of Li2O2 and the decomposition of main by-products (Li2CO3 and LiOH) proceed in a highly effective manner, prolonging the stability of Li-O2 batteries (243 cycles at 1000 mAh g−1 and 1000 mA g−1).
dc.description.sponsorshipThis work was financially supported by the National Key R&D Program of China (2017YFA0206700), the National Natural Science Foundation of China (21725103, 51702314), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA21010210), the Jilin Province Science and Technology Development Plan Funding Project (20180101203JC), the K. C. Wong Education Foundation (GJTD-2018-09), the Changchun Science and Technology Development Plan Funding Project (19SS010) and the National & local united engineering lab for power battery. The Supercomputing USTC is acknowledged for computational support.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202009064
dc.rightsArchived with thanks to Angewandte Chemie - International Edition
dc.titleHigh-Capacity and Stable Li-O2 Batteries Enabled by a Trifunctional Soluble Redox Mediator
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalAngewandte Chemie - International Edition
dc.rights.embargodate2021-07-21
dc.eprint.versionPost-print
dc.contributor.institutionState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
dc.contributor.institutionKey Laboratory of Automobile Materials, Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun, 130022, P. R. China
dc.contributor.institutionUniversity of Science and Technology of China, Hefei, 230026, P. R. China
kaust.personHuang, Gang
dc.date.accepted2020-07-21
dc.identifier.eid2-s2.0-85089864191
refterms.dateFOA2020-09-08T06:44:03Z
dc.date.published-online2020-08-26
dc.date.published-print2020-10-19


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