Abstract
One kind of PVA/PAA-based alkaline solid polyelectrolyte (ASPE) membrane with high conductivity and good mechanical property was prepared via the introduction of the micro-crystalline cellulose (MCC) as functional fillers. An ion conductivity of 95 mS cm−1 with high alkali resistance was achieved when the MCC content reached up to 5wt%, which is 4.5-fold higher than the control. SEM image showed a denser pore structure that is beneficial for the OH− conduction after MCC addition. X-ray diffraction further indicated a gradually decreased crystallinity of KOH with the addition of MCC. This means more content of KOH would exist in the ionic form in the remained water caused by the added MCC in the system. This leads to the increased content of OH− and the resulting ion conductivity. The window equals to 0.9 V and improved mechanical properties were observed after a 5wt% content of MCC was added in the ASPE membrane system.
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Acknowledgements
This work was financially supported by the Natural Science Foundation of Shandong Province, China (Grant No. ZR2019MEM002 and No. ZR2020ME078), China postdoctoral Science Foundation (Grant No. 2020M671980),the Key R&D project of Shandong Province (grant no. 2019JZZY010350 and no. 2019JZZY010316) , the Foundation of State Key Laboratory of Biobased Material and Green Papermaking,Qilu University of Technology,Shandong Academy of Sciences(No. ZZ20200120 and ZR20190205) and Outstanding Youth Innovation Team Project of Shandong Provincial University (2019KJC014).
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Cai, X., You, X., Wang, F. et al. Performance improvement of PVA-based alkaline polymer electrolyte membrane using micro-crystalline cellulose as functional filler. Appl. Phys. A 127, 357 (2021). https://doi.org/10.1007/s00339-021-04487-9
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DOI: https://doi.org/10.1007/s00339-021-04487-9