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dc.contributor.authorZhu, Yunpei
dc.contributor.authorYin, Jun
dc.contributor.authorEmwas, Abdul-Hamid
dc.contributor.authorMohammed, Omar F.
dc.contributor.authorAlshareef, Husam N.
dc.date.accessioned2021-09-14T11:32:22Z
dc.date.available2021-09-14T11:32:22Z
dc.date.issued2021-09-13
dc.date.submitted2021-08-01
dc.identifier.citationZhu, Y., Yin, J., Emwas, A., Mohammed, O. F., & Alshareef, H. N. (2021). An Aqueous Mg 2+ -Based Dual-Ion Battery with High Power Density. Advanced Functional Materials, 2107523. doi:10.1002/adfm.202107523
dc.identifier.issn1616-301X
dc.identifier.issn1616-3028
dc.identifier.doi10.1002/adfm.202107523
dc.identifier.urihttp://hdl.handle.net/10754/671208
dc.description.abstractRechargeable Mg batteries promise low-cost, safe, and high-energy alternatives to Li-ion batteries. However, the high polarization strength of Mg2+ leads to its strong interaction with electrode materials and electrolyte molecules, resulting in sluggish Mg2+ dissociation and diffusion as well as insufficient power density and cycling stability. Here an aqueous Mg2+-based dual-ion battery is reported to bypass the penalties of slow dissociation and solid-state diffusion. This battery chemistry utilizes fast redox reactions on the polymer electrodes, i.e., anion (de)doping on the polyaniline (PANI) cathode and (de)enolization upon incorporating Mg2+ on the polyimide anode. The kinetically favored and stable electrodes depend on designing a saturated aqueous electrolyte of 4.5 m Mg(NO3)2. The concentrated electrolyte suppresses the irreversible deprotonation reaction of the PANI cathode to enable excellent stability (a lifespan of over 10 000 cycles) and rate performance (33% capacity retention at 500 C) and avoids the anodic parasitic reaction of nitrate reduction to deliver the stable polyimide anode (86.2% capacity retention after 6000 cycles). The resultant full Mg2+-based dual-ion battery shows a high specific power of 10 826 W kg−1, competitive with electrochemical supercapacitors. The electrolyte and electrode chemistries elucidated in this study provide an alternative approach to developing better-performing Mg-based batteries.
dc.description.sponsorshipResearch reported in this work was supported by King Abdullah University of Science Technology (KAUST).
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/10.1002/adfm.202107523
dc.rightsArchived with thanks to Advanced Functional Materials
dc.titleAn Aqueous Mg 2+ -Based Dual-Ion Battery with High Power Density
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentCore Labs King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.identifier.journalAdvanced Functional Materials
dc.rights.embargodate2022-09-13
dc.eprint.versionPost-print
dc.identifier.pages2107523
kaust.personZhu, Yunpei
kaust.personYin, Jun
kaust.personEmwas, Abdul-Hamid
kaust.personMohammed, Omar F.
kaust.personAlshareef, Husam N.
dc.date.accepted2021-08-26


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