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Na2SO4‐Polyacrylamide Electrolytes and Enabled Solid‐State Electrochemical Capacitors
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2019-11-14 , DOI: 10.1002/batt.201900127 Alvin Virya 1 , Justin Abella 1 , Andrew Grindal 1 , Keryn Lian 1
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2019-11-14 , DOI: 10.1002/batt.201900127 Alvin Virya 1 , Justin Abella 1 , Andrew Grindal 1 , Keryn Lian 1
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A highly ionic‐conductive and high‐performance neutral pH polymer electrolyte comprises of Na2SO4 and polyacrylamide (PAM) was developed for solid electrochemical double‐layer capacitors (EDLCs). Na2SO4 was compared with Li2SO4 baseline in liquid electrolyte and exhibited higher ionic conductivity and identical stability window. Na2SO4−PAM electrolytes were optimized by varying their salt‐to‐polymer ratio. While all compositions show excellent stability for over 30‐day tracking period, an ionic conductivity of ca. 30 mS cm−1 was attained at 10,000 : 1 molar ratio of Na2SO4:PAM, among the highest reported for neutral pH polymer electrolytes. Raman spectroscopy verified that the electrolyte maintained well‐hydrated ions throughout the 30 days monitoring period. Solid EDLCs were constructed using activated carbon electrodes and Na2SO4−PAM electrolyte. They exhibited a wide 1.9 V operating window at 50 mV s−1 CV scan rate, with comparable capacitance to its liquid baseline. The solid EDLCs outperformed many symmetric devices in terms of energy and power densities. They also displayed good rate capability (up to 500 mV s−1) and excellent cycle life (>8,000 cycles).
中文翻译：
Na2SO4聚丙烯酰胺电解质和启用的固态电化学电容器
开发了一种由Na 2 SO 4和聚丙烯酰胺（PAM）组成的高离子导电性和高性能中性pH聚合物电解质，用于固体电化学双层电容器（EDLC）。在液体电解质中将Na 2 SO 4与Li 2 SO 4基线进行比较，并显示出更高的离子电导率和相同的稳定性窗口。通过改变盐与聚合物的比例来优化Na 2 SO 4 -PAM电解质。尽管所有组合物在超过30天的跟踪时间内均显示出出色的稳定性，但离子电导率约为。Na 2 SO的摩尔比为10,000：1时达到30 mS cm -14：PAM，是中性pH聚合物电解质中报道的最高值。拉曼光谱法证实，在整个30天的监测期内，电解质均保持了水分充足的离子。固态EDLC使用活性炭电极和Na 2 SO 4 -PAM电解质构建。它们在50 mV s -1 CV扫描速率下表现出1.9 V的宽工作窗口，并且具有与其液体基线相当的电容。就能量和功率密度而言，固态EDLC优于许多对称设备。它们还显示出良好的速率能力（高达500 mV s -1）和出色的循环寿命（> 8,000个循环）。
更新日期：2019-11-14
中文翻译：
Na2SO4聚丙烯酰胺电解质和启用的固态电化学电容器
开发了一种由Na 2 SO 4和聚丙烯酰胺（PAM）组成的高离子导电性和高性能中性pH聚合物电解质，用于固体电化学双层电容器（EDLC）。在液体电解质中将Na 2 SO 4与Li 2 SO 4基线进行比较，并显示出更高的离子电导率和相同的稳定性窗口。通过改变盐与聚合物的比例来优化Na 2 SO 4 -PAM电解质。尽管所有组合物在超过30天的跟踪时间内均显示出出色的稳定性，但离子电导率约为。Na 2 SO的摩尔比为10,000：1时达到30 mS cm -14：PAM，是中性pH聚合物电解质中报道的最高值。拉曼光谱法证实，在整个30天的监测期内，电解质均保持了水分充足的离子。固态EDLC使用活性炭电极和Na 2 SO 4 -PAM电解质构建。它们在50 mV s -1 CV扫描速率下表现出1.9 V的宽工作窗口，并且具有与其液体基线相当的电容。就能量和功率密度而言，固态EDLC优于许多对称设备。它们还显示出良好的速率能力（高达500 mV s -1）和出色的循环寿命（> 8,000个循环）。
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