کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6472457 | 1424137 | 2016 | 8 صفحه PDF | دانلود رایگان |
LiCl/DMAc (dimethylacetamide) solution dissolved microcrystalline cellulose (LD-MCC) showed potential benefits to the alkaline solid polymer electrolyte (ASPE). High alkali tolerance (up to 70Â wt% KOH loading), remarkable improvements in ionic conductivity (from 0.018Â SÂ cmâ1 to 0.153Â SÂ cmâ1) and mechanical properties (3-fold increase in tensile strength from 0.28Â MPa to 0.76Â MPa) were achieved just via an incorporation of 5Â wt% of LD-MCC into the ASPE matrix. Wide-angle X-ray diffraction indicated that LD-MCC entrapped KOH and hindered its aggregation. X-ray Energy Dispersive Spectrometer revealed that K+ was preferentially located on the LD-MCC surfaces rather than the polymeric matrix. Scanning Electron Microscopy of freeze-dry sample demonstrated a submicro-porous morphology with reduced average pore size (175Â nm) after the incorporation of LD-MCC in ASPE matrix. The incorporated LD-MCC acted as KOH stabilizer, hydrophilicity agent and OHâ transport media. Distinct micro-structures before and after the incorporation of LD-MCC were investigated to reveal the special role of LD-MCC in the performance improvement of ASPE membrane.
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Journal: Electrochimica Acta - Volume 220, 1 December 2016, Pages 635-642