Aziz Shujahadeen B, Brevik Iver, Hamsan Muhamad H, Brza M A, M Nofal Muaffaq, Abdullah Aziz M, Rostam Sarkawt, Al-Zangana Shakhawan, Muzakir Saiful K, Kadir Mohd F Z
Hameed majid Advanced Polymeric Materials Research Lab., Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq.
Department of Civil engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Iraq.
Polymers (Basel). 2020 Oct 1;12(10):2257. doi: 10.3390/polym12102257.
Compatible green polymer electrolytes based on methyl cellulose (MC) were prepared for energy storage electrochemical double-layer capacitor (EDLC) application. X-ray diffraction (XRD) was conducted for structural investigation. The reduction in the intensity of crystalline peaks of MC upon the addition of sodium iodide (NaI) salt discloses the growth of the amorphous area in solid polymer electrolytes (SPEs). Impedance plots show that the uppermost conducting electrolyte had a smaller bulk resistance. The highest attained direct current DC conductivity was 3.01 × 10 S/cm for the sample integrated with 50 wt.% of NaI. The dielectric analysis suggests that samples in this study showed non-Debye behavior. The electron transference number was found to be lower than the ion transference number, thus it can be concluded that ions are the primary charge carriers in the MC-NaI system. The addition of a relatively high concentration of salt into the MC matrix changed the ion transfer number from 0.75 to 0.93. From linear sweep voltammetry (LSV), the green polymer electrolyte in this work was actually stable up to 1.7 V. The consequence of the cyclic voltammetry (CV) plot suggests that the nature of charge storage at the electrode-electrolyte interfaces is a non-Faradaic process and specific capacitance is subjective by scan rates. The relatively high capacitance of 94.7 F/g at a sweep rate of 10 mV/s was achieved for EDLC assembly containing a MC-NaI system.
制备了基于甲基纤维素（MC）的适用于储能电化学双层电容器（EDLC）的绿色聚合物电解质。进行了X射线衍射（XRD）以进行结构研究。添加碘化钠（NaI）盐后MC结晶峰强度的降低揭示了固体聚合物电解质（SPEs）中非晶区的生长。阻抗图表明，最上层的导电电解质具有较小的体电阻。对于含有50 wt.% NaI的样品，最高达到的直流电导率为3.01×10 S/cm。介电分析表明，本研究中的样品表现出非德拜行为。发现电子转移数低于离子转移数，因此可以得出结论，离子是MC-NaI体系中的主要电荷载流子。向MC基质中添加相对高浓度的盐将离子转移数从0.75改变为0.93。通过线性扫描伏安法（LSV），本工作中的绿色聚合物电解质实际上在高达1.7 V时是稳定的。循环伏安法（CV）图的结果表明，电极-电解质界面处的电荷存储性质是非法拉第过程，比电容受扫描速率影响。对于包含MC-NaI体系的EDLC组件，在扫描速率为10 mV/s时实现了相对较高的94.7 F/g的电容。
