Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, Iran; Institute of Polymeric Materials, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, Iran.
Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, Iran; Institute of Polymeric Materials, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, Iran.
Int J Biol Macromol. 2024 Sep;276(Pt 1):133893. doi: 10.1016/j.ijbiomac.2024.133893. Epub 2024 Jul 15.
The idea of replacing liquid electrolytes with polymer electrolytes has been successful and the development of these electrolytes has provided acceptable results. With the start of using natural polymers in the polymer industry, as well as starch, these materials can be one of the most important candidates for the polymer matrix in electrolytes. In this study, starch has been investigated as a polymer electrolyte, poly[poly(ethylene glycol) methacrylate] (PEGMA) is grafted to the starch by radical polymerization, and synthesized copolymers are used as solid polymer electrolytes (SPEs). Furthermore, by adding N,N'-methylenebisacrylamide (MBA) as a cross-linking agent, gel polymer electrolytes (GPEs) are produced after swelling in the liquid electrolyte. After characterization, the synthesized polymer electrolytes are investigated in terms of electrochemical properties. The best ionic conductivity of 3.8 × 10 S cm is obtained for SPEs whereas it is obtained 4.3 × 10 S cm for GPEs at room temperature. The ion transfer number in the range of 0.47-0.91 confirms the compatibility between the electrolytes and electrode. Also, the prepared polymer electrolytes present excellent electrochemical properties, including, a wide electrochemical stability window above 4.7 V, good specific capacities in the range of 170-200 mAh g with a storage capacity of more than 92 %, and Coulombic efficiency of about 98 % after 100 cycles at 0.2 C.
用聚合物电解质替代液体电解质的想法已经取得了成功，这些电解质的发展提供了可以接受的结果。随着天然聚合物在聚合物工业中的应用以及淀粉的开始使用，这些材料可以成为电解质聚合物基质的最重要候选材料之一。在这项研究中，淀粉被研究作为聚合物电解质，通过自由基聚合将聚[聚（乙二醇）甲基丙烯酸酯]（PEGMA）接枝到淀粉上，合成的共聚物用作固体聚合物电解质（SPE）。此外，通过添加 N,N'-亚甲基双丙烯酰胺（MBA）作为交联剂，在液体电解质中溶胀后生成凝胶聚合物电解质（GPE）。经过表征后，研究了合成聚合物电解质的电化学性能。SPE 的最佳离子电导率为 3.8×10 S cm，而 GPE 的最佳离子电导率为 4.3×10 S cm，均在室温下获得。离子迁移数在 0.47-0.91 范围内，证实了电解质和电极之间的兼容性。此外，所制备的聚合物电解质具有优异的电化学性能，包括宽电化学稳定窗口超过 4.7 V，在 170-200 mAh g 的范围内具有良好的比容量，存储容量超过 92%，在 0.2 C 下 100 次循环后库仑效率约为 98%。
