Morphology Controlled Synthesis of SmMn₂O₅ Nanocrystals via a Surfactant-Free Route for Zn-Air Batteries

dc.contributor.authorYu, M.
dc.contributor.authorWei, Q.
dc.contributor.authorWu, M.
dc.contributor.authorWu, J.
dc.contributor.authorLiu, J.
dc.contributor.authorZhang, G.
dc.contributor.authorSun, S.
dc.contributor.authorWang, Weichao
dc.contributor.utdAuthorWang, Weichao
dc.date.accessioned2019-08-30T16:22:31Z
dc.date.available2019-08-30T16:22:31Z
dc.date.created2018-07-10
dc.description.abstractDeveloping earth abundant and highly active electrocatalysts to overcome the sluggish oxygen reduction kinetics is one of the key toward the practical applications of air batteries with economic efficiency and high energy density. Herein, a shape-controlled synthesis of mullite SmMn₂O₅ is achieved through a surfactant-free one-step hydrothermal method. SmMn₂O₅ nanoparticles (SmMn₂O₅-NPs) and nanorods (SmMn₂O₅-NRs) are successfully synthesized and in half-cell tests, SmMn₂O₅-NRs perform enhanced oxygen reduction activity relative to SmMn₂O₅-NPs in terms of a more positive half-wave potential and reduced peroxide yield. Importantly, rechargeable zinc-air batteries constructed with SmMn₂O₅-NRs exhibit not only higher peak power density (217 mW cm⁻²) over commercial Pt/C catalyst (190 mW cm⁻²) but also excellent cycling stability during long-term charging-discharging test over 170 h. The facile synthesis of SmMn₂O₅-NRs together with the remarkable electrocatalytic performance endows mullite SmMn₂O₅ with great promise in replacing the precious metal as future catalysts for air batteries.
dc.description.departmentErik Jonsson School of Engineering and Computer Science
dc.description.sponsorship"This work is supported by National Key Research and Development Program (Grant No. 2016YFB0901600), Tianjin City Fund for Distinguished Young Scholars, National Natural Science Foundation of China (21573117, and 11404172), 1000 Youth Talents Plan, the National Basic Research Program of China (973 Program with No. 2014CB931703), and Fundamental Research Funds for the Central Universities (Grant No. 63185015)."
dc.identifier.bibliographicCitationYu, M., Q. Wei, M. Wu, J. Wu, et al. 2018. "Morphology controlled synthesis of SmMn₂O₅ nanocrystals via a surfactant-free route for Zn-air batteries." Journal of Power Sources 396: 754-763, doi:10.1016/j.jpowsour.2018.06.095
dc.identifier.issn0378-7753
dc.identifier.urihttps://hdl.handle.net/10735.1/6799
dc.identifier.volume396
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.urihttp://dx.doi.org/10.1016/j.jpowsour.2018.06.095
dc.rights©2018 Elsevier B.V.
dc.source.journalJournal of Power Sources
dc.subjectMorphology
dc.subjectMullite
dc.subjectNanoparticles
dc.subjectPeroxides
dc.subjectElectric batteries
dc.titleMorphology Controlled Synthesis of SmMn₂O₅ Nanocrystals via a Surfactant-Free Route for Zn-Air Batteries
dc.type.genrearticle

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