Preparation and Electrochemical Performance of Chitosan-based Gel Polymer Electrolyte Containing Ionic Liquid for Non-aqueous Electric Double Layer Capacitor

Abstract

A novel gel polymer electrolyte based on chitosan with 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF 4) is prepared with a new procedure and applied to electric double layer capacitors (EDLCs). The chitosan-based gel polymer electrolyte causes less liquid leakage than the previous one. In this electrolyte system, EMImBF 4 plays the roles of both a solvent for dissolving chitosan and a charge carrier ion for EDLC application. The present chitosan solution for gel polymer electrolytes shows acidity, and its acidity is raised by increasing the amount of EMImBF 4 and the preparation temperature. The electrochemical stability of the electrolyte is decreased as the acidity of its chitosan solution increases. At 25°C, an EDLC cell with the electrolyte containing 70 wt.% EMImBF 4 showed good charge-discharge performance and lower electrode/electrolyte interfacial resistance than those of a liquid-phase EMImBF 4 system.

Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution

“…However, the dye molecules dispersed, trapped inside the adsorbent, and became a (water-soluble) gel. These phenomena were due to the strong ionic interaction between the amino groups (–NH 2 ) of ZL–CH hydrogel and AR88 through hydrogen bonding (H bond) [ 31 , 32 , 33 ]. However, even more so under acidic conditions, sulfonic acid groups still exhibit a pKa value below zero [ 34 ].…”

Micron-sized SiOx/N-doped carbon composite spheres fabricated with biomass chitosan for high-performance lithium-ion battery anodes

“…38,39 Recently, CS has been used to develop CS-based binders and gel polymer electrolytes for LIBs and Li-ion capacitors (LICs). [40][41][42][43][44][45] Because of its high nitrogen content, CS is also a favored precursor for electrode materials such as N-doped activated carbon or nano-composites composed of metal oxides and N-doped carbon (NC). [46][47][48] N-doping can effectively enhance electronic conductivity and contributes extra pseudocapacitive capacity, thus improving electrochemical performance.…”