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A concentrated poly(ethylene carbonate)/poly(trimethylene carbonate) blend electrolyte for all-solid-state Li battery
Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Tokyo 1848588, Japan.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.ORCID iD: 0000-0002-9862-7375
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.ORCID iD: 0000-0002-8019-2801
Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Tokyo 1848588, Japan.
2019 (English)In: Polymer journal, ISSN 0032-3896, E-ISSN 1349-0540, Vol. 51, no 8, p. 753-760Article in journal (Refereed) Published
Abstract [en]

Electrochemical and ion-transport properties of polymer blend electrolytes comprising poly(ethylene carbonate) (PEC), poly (trimethylene carbonate) (PTMC) and lithium bis(fluorosulfonyl) imide (LiFSI) were studied in this work, and the electrolyte with the best blend composition was applied in all-solid-state Li batteries. The ionic conductivity of both PEC and PTMC single-polymer electrolytes increased with increasing Li salt concentration. All PEC and PTMC blend electrolytes show ionic conductivities on the order of 10(-5) S cm(-1) at 50 degrees C, and the ionic conductivities increase slightly with increasing PEC contents. The PEC6PTMC4-LiFSI 150 mol% electrolyte demonstrated better Li/electrolyte electrochemical and interfacial stability than that of PEC and PTMC single-polymer electrolytes and maintained a polarization as low as 5 mV for up to 200 h during Li metal plating and stripping. A Li vertical bar SPE vertical bar LFP cell with the PEC6PTMC4-LiFSI 150 mol% electrolyte exhibited reversible charge/discharge capacities close to 150 mAh g(-1) at 50 degrees C and a C/10 rate, which is 88% of the theoretical value (170 mAh g(-1)).

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2019. Vol. 51, no 8, p. 753-760
National Category
Inorganic Chemistry
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URN: urn:nbn:se:uu:diva-392567DOI: 10.1038/s41428-019-0184-5ISI: 000478790200005OAI: oai:DiVA.org:uu-392567DiVA, id: diva2:1350015
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StandUpAvailable from: 2019-09-10 Created: 2019-09-10 Last updated: 2019-09-10Bibliographically approved

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Mindemark, JonasBrandell, Daniel

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