Abstract The transparent and renewable porous cellulose separators (ACR-3, ACR-5, ACR-7, ACR-9) with different concentration of cellulose solution (3 wt%, 5 wt%, 7 wt%, 9 wt%) were prepared via a phase-inversion process with 1-allyl-3-methylimidazolium chloride (AMIM-Cl) as the solvent. Cellulose separators displayed high thermal stability, strong mechanical properties and excellent apparent properties. ACR-7 separator showed a higher porosity of 74.90% and electrolyte uptake of 323.68% with a smaller pore size and a more uniform pore structure compared with the other cellulose separators. The assembled supercapacitors (electrode/separator/electrode, SCD-7) showed good electrochemical performances in many aspects, including a lower equivalent series resistance of 0.5Ω, a higher charge-discharge efficiency of 98.58% at 3 A/g and areal capacitance of 1.15 F cm−2 at 5 mV/s than the SCD-3, SCD-5, SCD-9 and the assembled SCDs with two commercial separators (TF4040 for SCD-40 and MPF30AC for SCD-30). SCD-7 showed a high retention of 81.99% after 4000 charge-discharge tests at 1 A/g, showing a good charge-discharge cycle stability. Compared with SCD-40 and SCD-30, SCD-7 showed a lower voltage drop below 0.03 V, a higher specific capacitance of 130 F/g, energy density of 25.94 Wh/kg and power density of 0.36 kW/kg at 0.5 A/g. Overall, ACR-7 is expected to be applied as a separator in the field of supercapacitors.

中文翻译：

---

相转化制备的环保热稳定纤维素薄膜作为超级电容器隔板

摘要 制备了不同浓度纤维素溶液（3 wt%、5 wt%、7 wt%、9 wt%）的透明可再生多孔纤维素隔膜（ACR-3、ACR-5、ACR-7、ACR-9）。通过以 1-烯丙基-3-甲基咪唑氯化物 (AMIM-Cl) 为溶剂的相转化过程。纤维素隔膜显示出高热稳定性、强机械性能和优异的表观性能。与其他纤维素隔膜相比，ACR-7 隔膜显示出更高的孔隙率和 323.68% 的孔隙率和 323.68% 的孔隙率，以及更小的孔径和更均匀的孔结构。组装的超级电容器（电极/隔膜/电极，SCD-7）在许多方面表现出良好的电化学性能，包括较低的等效串联电阻为0.5Ω，较高的充放电效率为98。与 SCD-3、SCD-5、SCD-9 和带有两个商用隔板的组装 SCD（用于 SCD-40 和 MPF30AC 的 TF4040）相比，在 3 A/g 和 5 mV/s 时的面积电容为 58% SCD-30）。SCD-7在1 A/g的4000次充放电测试后显示出81.99%的高保留率，显示出良好的充放电循环稳定性。与 SCD-40 和 SCD-30 相比，SCD-7 的电压降低于 0.03 V，比电容更高，为 130 F/g，能量密度为 25.94 Wh/kg，0.5 A 时的功率密度为 0.36 kW/kg /G。总体而言，ACR-7有望在超级电容器领域作为隔膜得到应用。显示出良好的充放电循环稳定性。与 SCD-40 和 SCD-30 相比，SCD-7 的电压降低于 0.03 V，比电容更高，为 130 F/g，能量密度为 25.94 Wh/kg，0.5 A 时的功率密度为 0.36 kW/kg /G。总体而言，ACR-7有望在超级电容器领域作为隔膜得到应用。显示出良好的充放电循环稳定性。与 SCD-40 和 SCD-30 相比，SCD-7 的电压降低于 0.03 V，比电容更高，为 130 F/g，能量密度为 25.94 Wh/kg，0.5 A 时的功率密度为 0.36 kW/kg /G。总体而言，ACR-7有望在超级电容器领域作为隔膜得到应用。