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Published: Kem. Ind. 69 (9-10) (2020) 503–514
Paper reference number: KUI-47/2020
Paper type: Original scientific paper
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The Influence of Sodium Alginate on the Properties of Poly(ethylene oxide) as the Matrix for the Preparation of Solid Polymer Electrolyte

S. Perinović Jozić, A. Sesar, Z. Grubač and B. Andričić


Investigation of the influence of sodium alginate (NaAlg) on the structure and properties of poly(ethylene oxide) (PEO) films cast from aqueous solutions was performed by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), non-isothermal thermogravimetry (TG), and electrochemical impedance spectroscopy (EIS). The research aimed to find the optimal blend for the preparation of a solid polymer electrolyte (SPE) film for lithium-ion batteries (LIB). In PEO/NaAlg blend films, hydrogen bonds are formed between PEO and NaAlg, the blends are miscible, and have a lower content of crystalline phase compared to pure PEO film. The films of the blends are more thermally unstable than the film of pure PEO, and show dielectric properties, but the blend 80PEO/20NaAlg is suitable for the preparation of SPE by addition of lithium salt due to the lowest content of PEO crystalline phase.

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poly(ethylene oxide), sodium alginate, hydrogen bond, crystallinity, thermal stability, impedance