Aziz Shujahadeen B, Asnawi Ahmad S F M, Kadir Mohd Fakhrul Zamani, Alshehri Saad M, Ahamad Tansir, Yusof Yuhanees M, Hadi Jihad M
Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46001, Iraq.
Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Kurdistan Regional Government, Sulaimani 46001, Iraq.
Polymers (Basel). 2021 Apr 7;13(8):1183. doi: 10.3390/polym13081183.
In this work, a pair of biopolymer materials has been used to prepare high ion-conducting electrolytes for energy storage application (ESA). The chitosan:methylcellulose (CS:MC) blend was selected as a host for the ammonium thiocyanate NHSCN dopant salt. Three different concentrations of glycerol was successfully incorporated as a plasticizer into the CS-MC-NHSCN electrolyte system. The structural, electrical, and ion transport properties were investigated. The highest conductivity of 2.29 × 10 S cm is recorded for the electrolyte incorporated 42 wt.% of plasticizer. The complexation and interaction of polymer electrolyte components are studied using the FTIR spectra. The deconvolution (DVN) of FTIR peaks as a sensitive method was used to calculate ion transport parameters. The percentage of free ions is found to influence the transport parameters of number density (), ionic mobility (), and diffusion coefficient (). All electrolytes in this work obey the non-Debye behavior. The highest conductivity electrolyte exhibits the dominancy of ions, where the ionic transference number, value of (0.976) is near to infinity with a voltage of breakdown of 2.11 V. The fabricated electrochemical double-layer capacitor (EDLC) achieves the highest specific capacitance, of 98.08 F/g at 10 mV/s by using the cyclic voltammetry (CV) technique.
在这项工作中，使用了一对生物聚合物材料来制备用于能量存储应用（ESA）的高离子传导电解质。选择壳聚糖：甲基纤维素（CS：MC）共混物作为硫氰酸铵NHSCN掺杂盐的主体。将三种不同浓度的甘油成功地作为增塑剂掺入CS-MC-NHSCN电解质体系中。研究了其结构、电学和离子传输性能。对于掺入42 wt.%增塑剂的电解质，记录到最高电导率为2.29×10 S cm。使用FTIR光谱研究了聚合物电解质组分的络合和相互作用。采用FTIR峰的去卷积（DVN）作为一种灵敏方法来计算离子传输参数。发现自由离子的百分比会影响数密度（）、离子迁移率（）和扩散系数（）的传输参数。这项工作中的所有电解质都服从非德拜行为。最高电导率的电解质表现出离子的主导性，其中离子迁移数，（0.976）的值接近无穷大，击穿电压为2.11 V。通过循环伏安法（CV）技术制备的电化学双层电容器（EDLC）在10 mV/s时实现了最高比电容，为98.08 F/g。
