Faculty of Chemistry, Materials and Bioengineering, Kansai University, Osaka 564-8680, Japan.
Faculty of Chemistry, Materials and Bioengineering, Kansai University, Osaka 564-8680, Japan.
Int J Biol Macromol. 2019 Mar 1;124:1274-1280. doi: 10.1016/j.ijbiomac.2018.12.006. Epub 2018 Dec 3.
A novel thin-film electrolyte (TFE) based on chitosan (CS) with 1‑ethyl‑3‑methylimidazolium tetrafluoroborate (EMImBF) was prepared by a new procedure for use as a solid electrolyte in electric double-layer capacitors (EDLCs). In this system, EMImBF plays important roles as both a dissolving solution and a charge carrier for EDLC application. By analyzing and characterizing the obtained products, the CS-TFEs showed a surface without CS/EMImBF phase separation and with high thermal stability and good tensile properties. The electrochemical properties were measured as the charge-discharge performance, the discharge capacitance, and alternating-current impedance. A test cell with CS-TFE with a calculated dry thin-film content of 80 wt% EMImBF showed a comparable IR drop and higher discharge capacitance than a liquid-phase EMImBF system and also showed low electrode/electrolyte interfacial resistance. Consequently, this novel CS-TFE is suitable for high-performance EDLCs and improves the safety of such devices.
一种新型的基于壳聚糖（CS）的薄膜电解质（TFE）与 1-乙基-3-甲基咪唑四氟硼酸盐（EMImBF）结合，通过一种新的方法制备，可作为电双层电容器（EDLCs）的固体电解质。在该体系中，EMImBF 作为溶解溶液和 EDLC 应用的载流子发挥着重要作用。通过对所得到的产物进行分析和表征，CS-TFEs 表现出表面没有 CS/EMImBF 相分离，具有高热稳定性和良好的拉伸性能。电化学性能通过充放电性能、放电电容和交流阻抗进行测量。具有计算的干薄膜含量为 80wt% EMImBF 的 CS-TFE 的测试单元显示出可比较的 IR 降和比液相 EMImBF 体系更高的放电电容，并且还显示出低的电极/电解质界面电阻。因此，这种新型的 CS-TFE 适用于高性能的 EDLCs 并提高了这些器件的安全性。
