Journal
APPLIED SURFACE SCIENCE ADVANCES
Volume 6, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsadv.2021.100139
Keywords
Electrospinning; Electroactive, Amorphous gel polymer; electrolyte, Ionic conductivity, Sodium-ion cell
Categories
Funding
- Ministry of Road and Transport
- Ministry of Human Resource Development, India [7911]
- DST inspire fellowship, India
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In this study, an electrospun amorphous PVDF-co-HFP based separator was shown to be a superior gel electrolyte material suitable for sodium-ion batteries. The amorphous gel polymer electrolyte (AGPE) displayed high ionic conductivity and wide electrochemical stability, leading to excellent cycling performance in the sodium-ion cell system.
Y In this work electrospun amorphous polyvinylidene fluoride-co-hexafluoropropylene (PVDF-co-HFP) based separator is shown to have a superior gel electrolyte material suitable to the sodium-ion cell. The 16 wt.% polymer solution was electrospun under a voltage of 18 kV to get an amorphous electroactive beta-phase structure. The amorphous beta-phase is indexed by an X-ray diffractometer (XRD). The ionic conductivities, electrolyte uptakes, and linear sweep voltammetry (LSV) of the amorphous gel polymer electrolyte (AGPE) are investigated by saturating the separator membrane in a liquid electrolyte solution of 0.6 M sodium hexafluorophosphate (NaPF6) dissolved in ethylene carbonate (EC)/propylene carbonate (PC) (1:1, vol.%). The AGPE displayed a high ionic conductivity of 1.28 x 10(-3) S cm(-1) and wide electrochemical stability up to 4.6 V vs Na/Na+ at room temperature. Further, the cells Na/AGPE/Na0.66Fe0.5Mn0.5O2 displayed an excellent cycling performance with little capacity loss.
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