還原氧化石墨烯-聚苯胺超級電容於含鋰電解液之性能比較

Abstract

本研究使用氮氣常壓噴射式電漿（Atmospheri Pressure Plasma Jet, APPJ）對碳布進行表面改質作為電極基材，接著網印上還原氧化石墨烯（rGO）-聚苯胺（PANI）漿料作為活性材料並烤乾製成還原氧化石墨烯-聚苯胺（rGO-PANI）超級電容電極，以銀/氯化銀電極（Ag/AgCl）作為參考電極和使用白金作為對電極，並分別使用了氯化鋰（LiCl）溶液、硫酸鋰（Li2SO4）溶液和硫酸（H2SO4）作為電解液對rGO-PANI電極進行三電極系統電化學分析。 為了評估rGO-PANI超級電容器的性能，運用了電化學阻抗譜（EIS）、循環伏安法（CV）和恆電流充放電法（GCD）等多種方法進行性能量測。電化學實驗结果表明，使用含鋰離子溶液作為電解液的rGO-PANI超級電容器表現出顯著的擬電容（PC）效應，而使用H2SO4電解液的超級電容器則表現出較大的電雙層電容（EDLC）效應。使用H2SO4電解液的超級電容器有最大的面積比電容，在三電極系統量測下為48.83 mF/cm2。在進行了10,000次循環伏安法的穩定性測試後，使用Li2SO4溶液電解液的rGO-PANI超級電容器表現出比使用LiCl溶液和H2SO4作為電解液的超級電容器更好的循環穩定性。

In this study, atmospheric pressure plasma jet (APPJ) was utilized to modify the surface of carbon cloth as an electrode substrate. Then, the reduced graphene oxide (rGO) and polyaniline (PANI) slurry was screen-printed and dried to form a rGO-PANI supercapacitor electrode. Three-electrode system electrochemical analysis of the rGO-PANI electrode was tested with Ag/AgCl electrode as reference electrode and platinum as counter electrode in LiCl solution, Li2SO4 solution, and H2SO4 electrolytes. The results of the electrochemical experiments showed that the rGO-PANI supercapacitors with lithium salt solution electrolytes exhibited a significant pseudocapacitance (PC) effect, whereas the supercapacitor with H2SO4 electrolytes had a large electrical double-layer capacitance (EDLC) effect. The supercapacitor using H2SO4 electrolyte exhibited the highest areal capacitance, measuring at 48.83 mF/cm2 in three-electrode system measurements. Furthermore, after conducting a 10,000-cycle CV stability test, the rGO-PANI supercapacitor using Li2SO4 solution electrolyte showed better cycling stability than those with LiCl solution and H2SO4 electrolytes.