Structural, electrical, and electrochemical properties of PVA-based biodegradable gel polymer electrolyte membranes for Mg-ion battery applications
| Autor: | Ravi Muchakayala, Jingwei Wang, Xingcheng Hu, Renchen Liu, Shenhua Song |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Vinyl alcohol Materials science General Chemical Engineering General Engineering General Physics and Astronomy 02 engineering and technology Polymer Electrolyte Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Membrane chemistry Chemical engineering Polymer chemistry Ionic conductivity General Materials Science Thermal stability 0210 nano-technology Trifluoromethanesulfonate |
| Zdroj: | Ionics. 23:1759-1769 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-017-1988-y |
| Popis: | Ionic liquid-doped biodegradable gel polymer electrolyte membranes are currently new opportunities for rechargeable magnesium-ion batteries. In this work, poly(vinyl alcohol)/magnesium trifluoromethanesulfonate/1-ethyl-3-methylimidazolium trifluoromethanesulfonate (PVA/Mg(Tf)2/EMITf) membranes of different compositions are prepared by solution casting. The crystalline structure, morphology, ionic conductivity, electrochemical stability window, and thermal stability of the membranes are analyzed by various techniques. It is found that the pristine PVA membrane possesses a semi-crystalline structure and its degree of crystallinity declines with augmenting EMITf concentration. The room-temperature ion conductivity of the 85PVA:15Mg(Tf)2:15EMITf gel polymer electrolyte membrane exhibits a high value of 2.10 × 10−4 S cm−1. Meanwhile, this gel polymer electrolyte membrane shows a wide electrochemical stability window (~5 V) and the temperature dependence of ionic conductivity obeys the Arrhenius rule (E a = 0.25 eV). Additionally, the mechanical properties of the electrolyte membrane are sufficiently high for its applications, being the following values: Young’s modulus = 33 MPa; breaking strain = 452%; yield strength = 4.8 MPa. This inexpensive and environment-friendly gel polymer electrolyte membrane could be a promising potential electrolyte material for Mg-ion battery applications. |
| Databáze: | OpenAIRE |
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