The Study of Plasticized Sodium Ion Conducting Polymer Blend Electrolyte Membranes Based on Chitosan/Dextran Biopolymers: Ion Transport, Structural, Morphological and Potential Stability

Polymers

卷:13

M.F.Z. Kadir¹  YuhaneesM. Yusof²  AhmadS.F.M. Asnawi²  SaadM. Alshehri³  Tansir Ahamad³  Iver Brevik⁴  ShujahadeenB. Aziz⁵  MohamadA. Brza⁵ 

[1] Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur 50603, Malaysia;

[2] Chemical Engineering Section, Universiti Kuala Lumpur Malaysian Institute of Chemical & Bioengineering Technology (UniKL MICET), Alor Gajah, Malacca 78000, Malaysia;

[3] Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;

[4] Department of Energy and Process Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway;

[5] Hameedmajid Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq;

关键词: Dextran-chitosan blend;    sodium triflate;    FTIR study;    impedance analysis;    circuit modeling;    transport properties;   

DOI  :  10.3390/polym13030383

来源: DOAJ

【 摘 要 】

The polymer electrolyte system of chitosan/dextran-NaTf with various glycerol concentrations is prepared in this study. The electrical impedance spectroscopy (EIS) study shows that the addition of glycerol increases the ionic conductivity of the electrolyte at room temperature. The highest conducting plasticized electrolyte shows the maximum DC ionic conductivity of 6.10 × 10⁻⁵ S/cm. Field emission scanning electron microscopy (FESEM) is used to investigate the effect of plasticizer on film morphology. The interaction between the electrolyte components is confirmed from the existence of the O–H, C–H, carboxamide, and amine groups. The XRD study is used to determine the degree of crystallinity. The transport parameters of number density (n), ionic mobility (µ), and diffusion coefficient (D) of ions are determined using the percentage of free ions, due to the asymmetric vibration (υas(SO₃)) and symmetric vibration (υs(SO₃)) bands. The dielectric property and relaxation time are proved the non-Debye behavior of the electrolyte system. This behavior model is further verified by the existence of the incomplete semicircle arc from the Argand plot. Transference numbers of ion (t_ion) and electron (t_e) for the highest conducting plasticized electrolyte are identified to be 0.988 and 0.012, respectively, confirming that the ions are the dominant charge carriers. The t_ion value are used to further examine the contribution of ions in the values of the diffusion coefficient and mobility of ions. Linear sweep voltammetry (LSV) shows the potential window for the electrolyte is 2.55 V, indicating it to be a promising electrolyte for application in electrochemical energy storage devices.

【 授权许可】

Unknown