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首页> 美国卫生研究院文献>Materials >The Study of Structural Impedance and Energy Storage Behavior of Plasticized PVA:MC Based Proton Conducting Polymer Blend Electrolytes
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The Study of Structural Impedance and Energy Storage Behavior of Plasticized PVA:MC Based Proton Conducting Polymer Blend Electrolytes

机译：塑化PVA结构阻抗和能量储存行为的研究：基于MC的质子传导聚合物共混电解质

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In this study, structural characterization, electrical properties and energy storage performance of plasticized polymer electrolytes based on polyvinyl alcohol/methylcellulose/ammonium thiocyanate (PVA/MC-NH4SCN) were carried out. An X-ray diffraction (XRD) study displayed that the plasticized electrolyte system with the uppermost value of direct current (DC) ionic conductivity was the most amorphous system. The electrolyte in the present work realized an ionic conductivity of 2.903 × 10−3 Scm−1 at room temperature. The main charge carrier in the electrolyte was found to be the ions with the ionic transference number (tion) of 0.912, compared to only 0.088 for the electronic transference number (telec). The electrochemical stability potential window of the electrolyte is 2.1 V. The specific capacitance was found to reduce from 102.88 F/g to 28.58 F/g as the scan rate increased in cyclic voltammetry (CV) analysis. The fabricated electrochemical double layer capacitor (EDLC) was stable up to 200 cycles with high efficiency. The specific capacitance obtained for the EDLC by using charge–discharge analysis was 132.7 F/g at the first cycle, which is slightly higher compared to the CV plot. The equivalent series resistance (ESR) increased from 58 to 171 Ω throughout the cycles, which indicates a good electrolyte/electrode contact. Ions in the electrolyte were considered to have almost the same amount of energy during the conduction process as the energy density is approximately at 14.0 Wh/kg throughout the 200 cycles. The power density is stabilized at the range of 1444.3 to 467.6 W/kg as the EDLC completed the cycles.
机译：在该研究中，基于聚乙烯醇/甲基纤维素/硫氰酸铵（PVA / MC-NH4SCN）的塑化聚合物电解质的结构表征，电性能和能量储存性能进行了溶液。 X射线衍射（XRD）研究显示，具有直流电（DC）离子电导率最高值的增塑电解质系统是最无定形的系统。本作工作中的电解质在室温下实现了2.903×10-3 SCM-1的离子电导率。发现电解质中的主电荷载体是具有0.912的离子转移数（TiOC）的离子，而电子转移数（Telec）仅为0.088。电解质的电化学稳定性电位窗是2.1V。发现特定电容从102.88 f / g减少到28.58 f / g，因为循环伏安法（CV）分析中的扫描速率增加。制造的电化学双层电容器（EDLC）高达200个循环，效率高。通过使用电荷 - 放电分析获得的EDLC的特定电容在第一循环中为132.7f / g，与CV图相比略高。在整个循环中，等效串联电阻（ESR）从58增加到171Ω，表示良好的电解质/电极接触。当能量密度大约在200次循环期间，电解质中的电解质中的离子在导通过程中具有几乎相同的能量。当EDLC完成循环时，功率密度在1444.3至467.6W / kg的范围内稳定。

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