A novel PEO-based blends solid polymer electrolytes doping liquid crystalline ionomers

作者：Zhang, Ai-ling^*; Cao, Fei-yu; Na, Gui-zhou; Wang, Song; Li, San-xi; Liu, Ji-chi

来源：Ionics, 2016, 22(11): 2103-2112.

DOI：10.1007/s11581-016-1732-z

• Conductivity
• Ion transference number
• PEO/PMMA blends
• LCI
• Polymer electrolytes

A novel PEO-based blends solid polymer electrolytes doping liquid crystalline ionomers (LCI), PEO/PMMA/LiClO4/LCI, and PEO/LiClO4/LCI were prepared by solution casting technology. Scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS) analysis proved that LCI uniformly dispersed into the solid electrolytes and restrained phase separation of PEO and PMMA. Differential scanning calorimetry (DSC) results showed that LCI decreases the crystallinity of blends solid polymer electrolytes. Thermogravimetric analysis (TGA) proved LCI not only improved thermal stability of PEO/PMMA/LiClO4 blends but also prevent PEO/PMMA from phase separation. Infrared spectra results illustrated that there exists interaction among Li+ and O, and LCI that promotes the synergistic effects between PEO and PMMA. The EIS result revealed that the conductivity of the electrolytes increases with LiClO4 concentration in PEO/PMMA blends, but it increases at first and reaches maximum value of 2.53 x 10(-4) S/cm at 1.0 % of LCI. The addition of 1.0 % LCI increases the conductivity of the electrolytes due to that LCl promoting compatibility and interaction of PEO and PMMA. Under the combined action of rigidity induced crystal unit, soft segment and the terminal ionic groups in LCI, PEO/PMMA interfacial interaction are improved, the reduction of crystallinity degree of PEO leads Li+ migration more freely.

• 出版日期2016-11
• 单位沈阳工业大学