Dannoun Elham M A, Aziz Shujahadeen B, Abdulwahid Rebar T, Al-Saeedi Sameerah I, Nofal Muaffaq M, Sadiq Niyaz M, Hadi Jihad M
Associate Chair of the Department of Mathematics and Science, Woman Campus, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia.
Hameed Majid Advanced Polymeric Materials Research Laboratory, Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46001, Iraq.
Membranes (Basel). 2022 Aug 8;12(8):769. doi: 10.3390/membranes12080769.
Stable and ionic conducting electrolytes are needed to make supercapacitors more feasible, because liquid electrolytes have leakage problems and easily undergo solvent evaporation. Polymer-based electrolytes meet the criteria, yet they lack good efficiency due to limited segmental motion. Since metal complexes have crosslinking centers that can be coordinated with the polymer segments, they are regarded as an adequate method to improve the performance of the polymer-based electrolytes. To prepare plasticized proton conducting polymer composite (PPC), a simple and successful process was used. Using a solution casting process, methylcellulose and dextran were blended and impregnated with ammonium thiocyanate and zinc metal complex. A range of electrochemical techniques were used to analyze the PPC, including transference number measurement (TNM), linear sweep voltammetry (LSV), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The ionic conductivity of the prepared system was found to be 3.59 × 10 S/cm using the EIS method. The use of glycerol plasticizer improves the transport characteristics, according to the findings. The carrier species is found to have ionic mobility of 5.77 × 10 cm V s and diffusion coefficient of 1.48 × 10 cm s for the carrier density 3.4 × 10 cm. The TNM revealed that anions and cations were the predominant carriers in electrolyte systems, with an ionic transference value of 0.972. The LSV approach demonstrated that, up to 2.05 V, the film was stable, which is sufficient for energy device applications. The prepared PPC was used to create an electrical double-layer capacitor (EDLC) device. The CV plot exhibited the absence of Faradaic peaks in the CV plot, making it practically have a rectangular form. Using the GCD experiment, the EDLC exhibited low equivalence series resistance of only 65 Ω at the first cycle. The average energy density, power density, and specific capacitance values were determined to be 15 Wh/kg, 350 W/kg, and 128 F/g, respectively.
为了使超级电容器更具可行性，需要稳定且离子导电的电解质，因为液体电解质存在泄漏问题且容易发生溶剂蒸发。基于聚合物的电解质符合这些标准，但由于链段运动受限，它们缺乏良好的效率。由于金属配合物具有可与聚合物链段配位的交联中心，因此它们被视为提高基于聚合物的电解质性能的一种适当方法。为了制备增塑质子传导聚合物复合材料（PPC），采用了一种简单且成功的工艺。通过溶液浇铸工艺，将甲基纤维素和葡聚糖混合并用硫氰酸铵和锌金属配合物浸渍。使用了一系列电化学技术来分析PPC，包括迁移数测量（TNM）、线性扫描伏安法（LSV）、循环伏安法（CV）、恒电流充放电（GCD）和电化学阻抗谱（EIS）。使用EIS方法测得所制备体系的离子电导率为3.59×10 S/cm。研究结果表明，甘油增塑剂的使用改善了传输特性。对于载流子密度为3.4×10 cm的情况，发现载流子物种的离子迁移率为5.77×10 cm V s，扩散系数为1.48×10 cm s。TNM表明阴离子和阳离子是电解质体系中的主要载流子，离子迁移值为0.972。LSV方法表明，该薄膜在高达2.05 V时是稳定的，这对于能量装置应用来说是足够的。所制备的PPC用于制造双电层电容器（EDLC）装置。CV曲线显示CV曲线中没有法拉第峰，使其实际上具有矩形形状。通过GCD实验，EDLC在第一个循环时表现出仅65Ω的低等效串联电阻。平均能量密度、功率密度和比电容值分别确定为15 Wh/kg、350 W/kg和128 F/g。
