From Cellulose, Shrimp and Crab Shells to Energy Storage EDLC Cells: The Study of Structural and Electrochemical Properties of Proton Conducting Chitosan-Based Biopolymer Blend Electrolytes
From Cellulose, Shrimp and Crab Shells to Energy Storage EDLC Cells: The Study of Structural and Electrochemical Properties of Proton Conducting Chitosan-Based Biopolymer Blend Electrolytes
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DOI：
10.3390/polym12071526
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发表时间：
2020-07-01
期刊：
影响因子：
5
通讯作者：
Al-Zangana, Shakhawan
中科院分区：
文献类型：
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作者：
Aziz, Shujahadeen B.;Hamsan, Muhamad H.;Al-Zangana, Shakhawan
本研究采用溶液浇铸技术合成了基于壳聚糖（CS）和甲基纤维素（MC）并掺入不同浓度的氟化铵（NH 4F）盐的固体聚合物共混电解质（SPBE）。傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）的结果证实了强烈的相互作用和分散的CS：MC系统内的非晶区在NH 4F的存在下。为了更好地了解样品的电性能，电化学阻抗谱（EIS）的结果进行了分析，通过电气等效电路（EEC）建模。对于掺入40 wt.%的样品，记录了2.96 × 10（-3）S cm（-1）的最高电导率。NH4F。通过迁移数测量（TNM）分析，确定了离子的分数。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。比电容的值被确定为约58.3F/g。稳定性测试表明，双电层电容器（EDLC）系统可以充电和放电高达100个循环，平均比电容为64.1 F/g。发现合成的EDLC电池表现出高效率（90%）。在第一次循环中，EDLC电池的内阻、能量密度和功率密度的值分别测定为65 Ω、9.3Wh/kg和1282 W/kg。
In this study, solid polymer blend electrolytes (SPBEs) based on chitosan (CS) and methylcellulose (MC) incorporated with different concentrations of ammonium fluoride (NH4F) 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 NH4F. 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 x 10(-3)S cm(-1)was recorded for the sample incorporated with 40 wt.% of NH4F. 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 omega, 9.3 Wh/kg and 1282 W/kg, respectively.