Na⁺ transport and structural evolution in NaTFSI-Doped PMMA gel polymer electrolytes
In this work, poly(methyl methacrylate) (PMMA) was incorporated with sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) and processed under vacuum to form GPE membranes. Structural interactions between Na⁺ ions and the PMMA host were confirmed by Fourier transform infrared (FTIR) analysis, while dif...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Springer Berlin Heidelberg
2026
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| Subjects: | |
| Online Access: | https://umpir.ump.edu.my/id/eprint/47422/1/Na%E2%81%BA%20transport%20and%20structural%20evolution%20in%20NaTFSI-Doped.pdf https://doi.org/10.1007/s00289-026-06307-7 https://umpir.ump.edu.my/id/eprint/47422/ |
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| Summary: | In this work, poly(methyl methacrylate) (PMMA) was incorporated with sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) and processed under vacuum to form GPE membranes. Structural interactions between Na⁺ ions and the PMMA host were confirmed by Fourier transform infrared (FTIR) analysis, while differential scanning calorimetry (DSC) showed a noticeable reduction in both the glass transition and crystallization temperatures, indicating enhanced chain flexibility and reduced crystallinity. Electrochemical impedance spectroscopy revealed that the sample with 20 wt% NaTFSI exhibited the highest ionic conductivity, reaching 3.65 × 10⁻⁴ S cm⁻¹ at room temperature. Additionally, a sodium-ion transference number of 0.50 was recorded, indicating selective and efficient Na⁺ transport through the polymer matrix. These results highlight the suitability of NaTFSI-doped PMMA GPEs for advanced sodium-ion devices where ionic mobility and polymer dynamics are crucial for performance. |
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