期刊
POLYMERS
卷 13, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/polym13010009
关键词
microcrystalline cellulose; polyvinyl alcohol; quaternary ammonium salt; alkaline polyelectrolyte membrane; Zn-air battery
资金
- Natural Science Foundation of Shandong Province, China [ZR2019MEM002]
- China postdoctoral Science Foundation [2020M671980]
- Key R&D project of Shandong Province [2019JZZY010350, 2019JZZY010316]
- Young Doctoral Cooperation Funds of Qilu University of Technology (Shandong Academy of Sciences) [2018BSHZ0028, 2018BSHZ0020]
- Shandong Key Scientific and Technical Innovation Project [2018YFJH0902]
- International Scientific and Technical Cooperation Project of Shandong Academy of Sciences [2019GHZD06]
The study developed an alkaline solid polyelectrolyte (ASPE) membrane by introducing microcrystalline cellulose (MCC) and its modified product (QMCC) into the polyvinyl alcohol (PVA) matrix. The addition of QMCC improved conductivity, water retention, and tensile strength of the polymer electrolyte, showing promising potential in flexible electronic devices and Zn-air batteries.
In this study, a type of alkaline solid polyelectrolyte (ASPE) membrane was developed via the introduction of microcrystalline cellulose (MCC) and its modified product (QMCC) into the polyvinyl alcohol (PVA) matrix. In this process, green NaOH/urea-based solvent was used to achieve a good dispersion of MCC in the PVA matrix; meanwhile, the OH- groups in the NaOH/urea-based solvent provided an alkaline environment for good ion conductivity. Compared to the MCC-incorporated ASPE, further improved conductivity was achieved when the MCC was modified with quantitative quaternary ammonium salt. TGA showed that the addition of QMCC improved the water retention of the matrix, which was beneficial to the OH- conduction in the system. Compared to the control (50 mS cm(-1)), a maximum conductivity of 238 mS cm(-1) was obtained after the incorporation of QMCC in the PVA matrix. Moreover, the tensile strength of the polymer electrolyte were also significantly increased with the addition of QMCC. Finally, this developed ASPE membrane was used in assembling a flexible Zn-air battery and showed a promising potential in the development of flexible electronic devices.
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