B Aziz Shujahadeen, H Hamsan Muhamad, M Nofal Muaffaq, San Saro, Abdulwahid Rebar T, Raza Saeed Salah, Brza Mohamad A, Kadir Mohd F Z, Mohammed Sewara J, Al-Zangana Shakhawan
Hameed Majid Advanced Polymeric Materials Research Lab., Department of 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, Kurdistan Regional Government, Iraq.
Polymers (Basel). 2020 Jul 9;12(7):1526. doi: 10.3390/polym12071526.
In this study, solid polymer blend electrolytes (SPBEs) based on chitosan (CS) and methylcellulose (MC) incorporated with different concentrations of ammonium fluoride (NHF) salt were synthesized using a solution cast technique. Both Fourier transformation infrared spectroscopy (FTIR) and X-ray diffraction (XRD) results confirmed a strong interaction and dispersion of the amorphous region within the CS:MC system in the presence of NHF. To gain better insights into the electrical properties of the samples, the results of electrochemical impedance spectroscopy (EIS) were analyzed by electrical equivalent circuit (EEC) modeling. The highest conductivity of 2.96 × 10 S cm was recorded for the sample incorporated with 40 wt.% of NHF. Through transference number measurement (TNM) analysis, the fraction of ions was specified. The electrochemical stability of the electrolyte sample was found to be up to 2.3 V via the linear sweep voltammetry (LSV) study. The value of specific capacitance was determined to be around 58.3 F/g. The stability test showed that the electrical double layer capacitor (EDLC) system can be recharged and discharged for up to 100 cycles with an average specific capacitance of 64.1 F/g. The synthesized EDLC cell was found to exhibit high efficiency (90%). In the 1st cycle, the values of internal resistance, energy density and power density of the EDLC cell were determined to be 65 Ω, 9.3 Wh/kg and 1282 W/kg, respectively.
在本研究中，采用溶液浇铸技术合成了基于壳聚糖（CS）和甲基纤维素（MC）并掺入不同浓度氟化铵（NHF）盐的固体聚合物共混电解质（SPBEs）。傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）结果均证实，在NHF存在下，CS:MC体系内非晶区存在强烈的相互作用和分散。为了更好地了解样品的电学性能，通过等效电路（EEC）建模对电化学阻抗谱（EIS）结果进行了分析。掺入40 wt.% NHF的样品记录到最高电导率为2.96×10 S cm。通过迁移数测量（TNM）分析确定了离子分数。通过线性扫描伏安法（LSV）研究发现电解质样品的电化学稳定性高达2.3 V。比电容值确定为约58.3 F/g。稳定性测试表明，双电层电容器（EDLC）系统可充电和放电达100次循环，平均比电容为64.1 F/g。发现合成的EDLC电池具有高效率（90%）。在第1个循环中，EDLC电池的内阻、能量密度和功率密度值分别确定为65 Ω、9.3 Wh/kg和1282 W/kg。
